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#76 2019-01-17 13:15:55

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 7,298

Re: Holidays

Today's Twitter feed included a link to a NASA feature:

go.nasa.gov/2FEG02h

That link translated to:
https://apod.nasa.gov/apod/ap190117.html

Astronomy Picture of the Day

The scene on offer is from Sweden, and it features a skyscape set against a cabin in a remote location.

This picture inspired the thought that similar views of the night sky on Mars should be spectacular.

No doubt the Moon would be a similarly advantageous location for spectacular photography, beyond the examples already provided by the Apollo expeditions.

(th)

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#77 2019-01-17 17:49:04

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,078

Re: Holidays

Depends on what is working still, new machines being sent and what sort of qualifies for a discovery...

The JPL site has a selector to narrow up what you would like to see
https://www.jpl.nasa.gov/news/

Mission details and more is available
https://mars.nasa.gov/news/

Of course from the top of the page is the http://www.marsnews.com/

http://www.marsdaily.com/

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#78 2019-01-18 21:55:13

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 7,298

Re: Holidays

2019/01/18 Today on Mars Post

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html

Martian Year: 34        Martian Month in 12 month format: 11
Solar Longitude: 325.9    Sol Number: 606

Previous SL: 325.3        Previous Sol: 605

Note that Solar Longitude measurement varies as a function of location in orbit.

Sol 606 is in Month 22 of a Proposed 24 month calendar.  See Post 19 for a summary.
Month 22 extends from Sol 586 through 613

Candidate names for this month are: Wisdom, Wallaby

Note that the Martian Sol will repeat in this report every 36 (Days or Sols – not sure)

1440 minutes in Terran day / 39 minutes longer on Mars >> 36 and change

The purpose of this series is to try out a concept for a reliable, practical business calendar.

A reliable, practical calendar is helpful for scheduling non-business group activities.

This morning I joined other volunteers for a work session that is scheduled for weeks in advance for regular participants, and as little as a day in advance for last minute help.

It seems likely to me that associations of persons deployed on Mars will likewise schedule volunteer activities to support the community in a variety of ways.

(th)

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#79 2019-01-19 18:31:55

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 7,298

Re: Holidays

2019/01/19 Today on Mars Post

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html

Martian Year: 34        Martian Month in 12 month format: 11
Solar Longitude: 326.4    Sol Number: 607

Previous SL: 325.9        Previous Sol: 606

Note that Solar Longitude measurement varies as a function of location in orbit.

Sol 607 is in Month 22 of a Proposed 24 month calendar.  See Post 19 for a summary.
Month 22 extends from Sol 586 through 613

Candidate names for this month are: Wisdom, Wallaby

Note that the Martian Sol will repeat in this report every 36 (Days or Sols – not sure)

1440 minutes in Terran day / 39 minutes longer on Mars >> 36 and change

The purpose of this series is to try out a concept for a reliable, practical business calendar.

A reliable, practical calendar is helpful for reporting weather trends and forecasts.

While weather on Mars is distinctly different from that on Earth, forecasts will be important for planning, whether of business, government, or social activities.

(th)

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#80 2019-01-19 19:52:42

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,078

Re: Holidays

As much as we use a calendar to keep dates and schedules there are not all that many holidays that are observed but here is a list that contains others.

https://www.timeanddate.com/holidays/us/

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#81 2019-01-20 10:43:52

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 7,298

Re: Holidays

SpaceNut ... Your ability to find interesting articles related to a discussion is remarkable every day, but on THIS occasion it is  like a fly fisherman who lands a 42 pound trout in this find!

I am surprised to discover that January 20th is one of the FEW days without a holiday of some kind!

Carrying that thought further ... EVERY day is a birthday, and thus a special day to millions of people, their relatives and friends.

And THAT leads me to the realization that a reliable, understandable calendar will be necessary for recording births and deaths on Mars, marriages and divorces, and other events which are date related for legal purposes.

(th)

SpaceNut wrote:

As much as we use a calendar to keep dates and schedules there are not all that many holidays that are observed but here is a list that contains others.

https://www.timeanddate.com/holidays/us/

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#82 2019-01-20 12:30:12

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 7,298

Re: Holidays

SearchTerm:TodayOnMars
SearchTerm:CalendarForMars

Today on Mars: 0036/08/26  Thursday <<-- Days of the week are not in alignment with Earth. 

Today on Earth: 2021/09/22 Wednesday (Earth Date) Post Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html

Martian Year: 36  Martian Month in 12 month format: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

Solar Longitude: 102.3  Sol Number: 221  Change in degrees is +.4
Previous SL:      101.9  Previous Sol:220

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion occurred on Sol 152 at 71 degrees Ls.
Aphelion occurred near 70 degrees Ls on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Distance: Mars >> Sun per theskylive.com:   245,497,935 km [22.3 km/s] Difference is -099345 <= 4227 km/hour at 8.0 on 09/22 (time:8:00)
Distance: Mars >> Sun per theskylive.com:   245,597,280 km [22.3 km/s] Difference is -102285 <= 4175 km/hour at 8.5 on 09/21 (time:8:30)
Distance: Mars >> Sun per theskylive.com:   245,699,565 km [22.3 km/s] Difference is -094746 <= 4119 km/hour at 8.0 on 09/20 (time:8:00)

Next up: Star TYC 4940-264-1 Magnitude 11.20 below path Day 0 about 11 hours ahead
Next up: Galaxy PGC 1124430 RA 12h 19m 46.6s above path Day 0 about 15 hours ahead
Two galaxies just below path: PGC 1127204 RA 12h 17m 32.0s and PGC 1126921 Day 0 about 15 hours ahead - Day 1 about 5 hours behind
There are ** way ** more galaxies than I care to count.  NGC 4202 is close enough to have a clear shape. Magnitude is given as 14.50.

As a general observation ... In recent days I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view.
Update 2021/07/30 I wrote to an astronomer to ask if there might be a web site with a view showing the galaxy in context of a given view.

Note: The curve of the path of Mars as seen against the background of stars is now a line trending noticeably down and East as seen from Earth
In recent days, the curve has been slowly bending down through horizontal.  Earth Distance at last update here) was km 394,640,041
Mars and Earth are approaching opposition.  The two planets will soon be on opposite sides of the Sun. Earth Distance will reach a maximum.
Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Light travel time today is between 21 and 22 minutes. Communications delay would be 42+ minutes round trip. [21:390,000,000] [22:420,000,000]

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 221 is in Month 08 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 08 extends from Sol 196 through 223. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 08
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 221 is Thursday  in the Proposed Business calendar for Mars.  <<== Skip day occurred August 25th the next skip day is expected October 1 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year is 36.

The next Skip Day will occur in October (1st on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

Also notable in October (on Earth) will be the conjunction of the Sun with Mars. That event ** should ** be visible in the daily theskylive.com display.
The date I am watching for is October 7th, 2021.

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insights weather info has been suspended and now is directing to msl***

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 8 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 days)

Day-of-Week  1     8    15   22
Sunday        196 203 210 217
Monday        197 204 211 218
Tuesday       198 205 212 219
Wednesday   199 206 213 220
Thursday      200 207 214 221
Friday          201 208 215 222
Saturday      202 209 216 223

Month 7 of 24: - Quarter 2 of 4 [Month 7-12] (This month has 28 days)

Day-of-Week  1     8    15   22
Sunday        168  175   182  189
Monday        169  176   183  190
Tuesday       170  177   184  191
Wednesday   171  178  185  192
Thursday      172   179  186  193 <<== skip day 2021
Friday          173   180  187  194
Saturday      174   181  188  195

Month 6 of 24 - Quarter 1 of 4 [Month 1-6]  (This month has 27 days)

Day-of-Week   1     8    15   22
Sunday         141   148  155  162
Monday        142   149  156  163
Tuesday       143   150  157  164
Wednesday   144   151  158  165
Thursday      145    152  159  166
Friday          146    153  160         <<== skipped Friday in last week of a quarter
Saturday      147    154  161  167

Month 5 of 24 - Quarter 1 of 4 [Month 1-6]

Day-of-Week  1      8     15   22
Sunday        113   120  127 134
Monday        114   121  128 135
Tuesday       115   122  129 136
Wednesday   116  123  130 137
Thursday     117    124  131 138
Friday          118    125  132 139 << Not skipped because not last month of quarter
Saturday      119    126  133 140

Month 4 of 24 Quarter 1 of 4 [Month 1-6]

Day-of-Week  1     8    15   22
Sunday         85 92  99 106
Monday        86 93 100 107
Tuesday       87 94 101 108
Wednesday  88 95 102 109
Thursday      89 96 103 110
Friday           90 97 104 111
Saturday       91 98 105 112 << 28*4 >> 32+80

Month 3 of 24  Quarter 1 of 4

Day-of-Week  1    8   15   22
Sunday        57  64   71   78
Monday       58   65   72  79
Tuesday      59   66   73  80
Wednesday 60   67   74  81
Thursday     61   68   75  82
Friday          62   69   76  83
Saturday      63   70   77  84 << 28*3 >> 24+60

Month 2 of 24: Month 2 of Quarter 1 Year 36
Day-of-Week  1     8    15   22
Sunday        29   36   43    50
Monday       30    37   44   51
Tuesday      31    38   45    52
Wednesday  32    39   46   53
Thursday      33   40    47   54
Friday          34   41     48   55 Friday is skipped last month of quarter
Saturday      35   42     49   56

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 36
Day-of-Week  1     8    15   22
Sunday        1   8 15 22 
Monday        2  9 16 23
Tuesday       3 10 17 24
Wednesday   4 11 18 25
Thursday      5 12 19 26
Friday          6 13 20 27 Friday is skipped last month of quarter
Saturday      7 14 21 28

Month 24 of 24: Last month of Quarter 4 and Last month of Mars year

Day-of-Week  1     8    15   22
Sunday         642 649 656 663
Monday        643 650 657 664
Tuesday       644 651 658 665
Wednesday  645 652 659 666
Thursday      646 653 660 667
Friday          647 654 661 <<== Skipping Friday because Last Week of Quarter 4
Saturday      648 655 662 668 <<== This day will be extended in length to complete the year

Month 23 of 24: <<== Fifth month of Quarter 4

Day-of-Week  1     8    15   22
Sunday         614 621 628 635
Monday        615 622 629 636
Tuesday       616 623 630 637
Wednesday  617 624 631 638
Thursday      618 625 632 639
Friday          619 626 633 640
Saturday      620 627 634 641 <<== there are 28 days in Month 23

Month 22 of 24: <<== Fourth month of Quarter 4

Day-of-Week  1     8    15   22
Sunday        586 593 600 607
Monday       587 594 601 608
Tuesday      588 595 602 609
Wednesday 589 596 603 610
Thursday     590 597 604 611
Friday         591 598 605 612
Saturday     592 599 606 613 <<== there are 28 days in Month 22

Month 21 of 24: <<== Third month of Quarter 4

Day-of-Week  1     8    15   22
Sunday        558 565 572 579
Monday       559 566 573 580
Tuesday      560 567 574 581
Wednesday 561 568 575 582
Thursday     562 569 576 583
Friday         563 570 577 584
Saturday     564 571 578 585 <<28 days in Month 21

Month 20 of 24: <<== Second month of Quarter 4

Day-of-Week  1     8    15   22
Sunday        530 537 544 551
Monday        531 538 545 552
Tuesday       532 539 546 553
Wednesday  533 540 547 554
Thursday      534 541 548 555
Friday          535 542 549 556 <<== Skip Day in Year 35
Saturday      536 543 550 557 <<== 28 days in Month 20

Month 19 of 24: <<== First month of Quarter 4

Day-of-Week  1     8    15   22
Sunday         502 509 516 523
Monday        503 510 517 524
Tuesday       504 511 518 525
Wednesday   505 512 519 526
Thursday      506 513 520 527
Friday          507 514 521 528
Saturday      508 515 522 529 <<== 28 days in Month 19

Month 18 of 24: Last month of Quarter 3 << There are 27 days in Month 18 <<== Proposed name: Perihelion

Day-of-Week  1     8    15   22
Sunday         475 482 489 496
Monday        476 483 490 497
Tuesday       477 484 491 498
Wednesday  478 485 492 499
Thursday      479 486 493 500
Friday          480 487 494       <<== Skipped Friday in Last month of Quarter
Saturday      481 488 495 501

Month 17 of 24: << There are 28 days in Month 17. Fifth month of Q3

Day-of-Week  1     8    15   22
Sunday         447 454 461 468
Monday        448 455 462 469
Tuesday       449 456 463 470
Wednesday  450 457 464 471
Thursday      451 458 465 472
Friday          452 459 466 473
Saturday      453 460 467 474
     
Month 16 of 24: Fourth month of the 3rd Quarter and Second Half

Day-of-Week  1     8    15   22
Sunday         419 426 433 440
Monday        420 427 434 441
Tuesday       421 428 435 442
Wednesday  422 429 436 443
Thursday      423 430 437 444
Friday           424 431 438 445
Saturday      425 432 439 446

Month 15 of 24: Third month of the 3rd Quarter and Second Half

Day-of-Week  1     8    15   22
Sunday         391 398 405 412
Monday        392 399 406 413
Tuesday       393 400 407 414
Wednesday  394 401 408 415
Thursday      395 402 409 416
Friday           396 403 410 417
Saturday      397 404 411 418

Month 14 of 24: Second month of the 3rd Quarter and 2nd Half

Day-of-Week  1     8    15   22
Sunday         363 370 377 384
Monday        364 371 378 385
Tuesday       365 372 379 386
Wednesday  366 373 380 387
Thursday      367 374 381 388
Friday           368 375 382 389
Saturday      369 376 383 390

Month 13 of 24: This is the first month of the 3rd Quarter and 2nd Half

Day-of-Week  1     8    15   22
Sunday         335 342 349 356
Monday        336 343 350 357
Tuesday       337 344 351 358
Wednesday  338 345 352 359
Thursday      339 346 353 360
Friday           340 347 354 361
Saturday      341 348 355 362

Month 12 of 24: This is the last month of the Second Quarter.

Day-of-Week  1     8    15   22
Sunday         308 315 322 329
Monday        309 316 323 330
Tuesday       310 317 324 331
Wednesday  311 318 325 332
Thursday      312 319 326 333
Friday           313 320 327 <<==skip Friday due to end of Quarter
Saturday      314 321 328 334

Month 11 of 24: Quarter 2 of 4 [Months 7-12] (This month has 28 days)  <<==Last Sol of Month 11

Day-of-Week  1     8    15   22
Sunday         280 287 294 301
Monday        281 288 295 302 <<== skip day on Earth
Tuesday       282 289 296 303
Wednesday  283 290 297 304
Thursday      284 291 298 305
Friday           285 292 299 306
Saturday      286 293 300 307

Month 10 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 days)

Day-of-Week  1     8    15   22
Sunday         252 259 266 273
Monday        253 260 267 274
Tuesday       254 261 268 275
Wednesday  255 262 269 276
Thursday      256 263 270 277
Friday           257 264 271 278
Saturday      258 265 272 279

Month 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 days)

Day-of-Week  1     8    15   22
Sunday         224 231 238 245
Monday        225 232 239 246
Tuesday       226 233 240 247
Wednesday  227 234 241 248
Thursday      228 235 242 249
Friday           229 236 243 250
Saturday      230 237 244 251

The Earth weekday and the Mars weekday synchronize every 36*7 Earth days (252)

Mars Calendar Spreadsheet: Summary for One Mars Year
Plan: 24 months of 28 days each less 1 day per quarter
      and an extended day on New Year's Eve                       
Month Days  Sum  First Day Last Day Quarter
1        28    28    1    28    1
2        28    56    29    56   
3        28    84    57    84   
4        28    112    85    112   
5        28    140    113    140   
6        27    167    141    167   
7        28    195    168    195    2
8        28    223    196    223   
9        28    251    224    251   
10        28    279    252    279   
11        28    307    280    307   
12        27    334    308    334   
13        28    362    335    362    3
14        28    390    363    390   
15        28    418    391    418   
16        28    446    419    446   
17        28    474    447    474   
18        27    501    475    501   
19        28    529    502    529    4
20        28    557    530    557   
21        28    585    558    585   
22        28    613    586    613   
23        28    641    614    641   
24        27    668    642    668   

Candidate names for month 1 are: Asimov (biographical) Aquarius (Zodiac) Aries (Zodiac)
Candidate names for month 2 are:  Bradbury and Burroughs; Barsoom (created by Burroughs)

Note: There is at least one alternative 24 month calendar published on the Internet, and it includes name suggestions.

Perihelion occurred on 2020/08/03 (Earth Calendar) as predicted.

Edit 2020/07/24:

August 3, 2020 (on Earth)
Mars' perihelion is a once-in-two-Earth-years event. Mars came to perihelion last on October 29, 2016. Its next perihelion will be August 3, 2020. None of the planets have exactly circular orbits, but most, like Earth, have orbits around the sun that are nearly circular. Sep 16, 2018
From: earthsky.org › mars-perihelion-closest-to-sun

From Google search: A Martian Sol lasts 24 Earth hours, 39 Earth minutes and 35.244 Earth Seconds.
Given 24 hours in an Earth day, and 60 Earth minutes in an Earth hour, a "skip day" will occur every 36.9+ Earth days.
1440 minutes divided by 39 is 36.9  To estimate skip day, use 37 days in date calculator. Note occasional 38 day difference.

Note that the Martian Sol will repeat in this report every 36+ (Days or Sols – not sure)

Repeat occurred on Earth day 2019/03/20  (Sol 11) [Sunday=Sunday] Next occurrence ** should ** be (near) 2019/04/04
Repeat occurred on Earth day 2019/05/11 (Sol 47) The next occurrence ** should ** be (near) 2019/06/15 (actual 6/16)
Repeat occurred on Earth day 2019/06/16 (Sol 83)  The next occurrence ** should** be (near) 2019/07/20 (actual 7/25)
Repeat occurred on Earth day 2019/07/25 (Sol 120) the next occurrence ** should ** be (near) 2019/08/30 (actual 8/31)
Repeat occurred on Earth day 2019/08/31 (Sol 156) the next occurrence ** should ** be (near) 2019/10/06  (actual 10/07)
Repeat occurred on Earth day 2019/10/07 (Sol 192) the next occurrence ** should ** be (near) 2019/11/12 (actual 11/14)
Repeat occurred on Earth day 2019/11/14 (Sol 229) the next occurrence ** should ** be (near) 2019/12/22 (actual 12/21)
Repeat occurred on Earth day 2019/12/21 (Sol 265) Days of Week are aligned      ** be (near) 2020/01/27 (actual 01/27)
Repeat occurred on Earth day 2020/01/27 (Sol 302) the next occurrence ** should ** be (near) 2020/03/04 (actual 03/05)
Repeat occurred on Earth day 2020/03/05 (Sol 338) the next occurrence ** should ** be (near) 2020/04/11 (actual 04/11)
Repeat occurred on Earth day 2020/04/11 (Sol 374) the next occurrence ** should ** be (near) 2020/05/17 (actual 05/19) 38 days
Repeat occurred on Earth day 2020/05/19 (Sol 411) the next occurrence ** should ** be (near) 2020/06/26 (actual 06/25) 37 days
Repeat occurred on Earth day 2020/06/25 (Sol 447) the next occurrence ** should ** be (near) 2020/08/01 (actual 08/01) 37 days
Repeat occurred on Earth day 2020/08/01 (Sol 483) the next occurrence ** should ** be (near) 2020/09/07 (actual 09/08) 38 days
Repeat occurred on Earth day 2020/09/08 (Sol 520) the next occurrence ** should ** be (near) 2020/10/15 (actual 10/15) 37 days
Repeat occurred on Earth day 2020/10/15 (Sol 556) the next occurrence ** should ** be (near) 2020/11/21 (actual 11/22) 38 days
Repeat occurred on Earth day 2020/11/22 (Sol 593) Days of Week are aligned    ** be (near) 2020/12/29 (actual 12/30) 39 days
Repeat occurred on Earth day 2020/12/30 (Sol 630) the next occurrence ** should ** be (near) 2021/02/05 (actual 02/04) 36 days
Repeat occurred on Earth day 2021/02/04 (Sol 665) the next occurrence ** should ** be (near) 2021/03/15 (actual 02/19) 15 days
Repeat occurred on Earth day 2021/03/30 (Sol 049) the next occurrence ** should ** be (near) 2021/03/15 (actual 03/30) 39 days
Repeat occurred on Earth day 2021/03/30 (Sol 049) the next occurrence ** should ** be (near) 2021/05/06 (actual 05/05) 36 days
Repeat occurred on Earth day 2021/05/05 (Sol 084) the next occurrence ** should ** be (near) 2021/06/10 (actual 06/11) 37 days
Repeat occurred on Earth day 2021/06/11 (Sol 120) the next occurrence ** should ** be (near) 2021/07/21 (actual 07/21) 40 days
Repeat occurred on Earth day 2021/07/21 (Sol 159) the next occurrence ** should ** be (near) 2021/08/27 (actual 08/25) 35 days
Repeat occurred on Earth day 2021/08/25 (Sol 163) the next occurrence ** should ** be (near) 2021/09/02 (actual mm/dd) ## days

The transition from Mars year 35 to 36 occurred on February 7, 2021 Earth time. A new skip day schedule started.

Repeat occurred on Earth day 2021/02/19 (Sol 011) the next occurrence ** should ** be (near) 2021/03/30 (actual) ???


***Anomaly: The Sol number computed for Mars at midnight on Earth was 11, when it ** should ** have been 12
***Anomaly: By advancing the UTC time to + 1:0:0, the Sol number advanced to 12

1440 minutes in Terran day / 39 minutes longer on Mars >> 37 and change

The recruiting text below will no longer be included in the day post, as of 2020/03/17

The topic My Hacienda is set up to encourage up to 2750 forum members to build a virtual community.
Each participant "claims" a square kilometer of surface, and shares below surface with the community.
Each Hacienda is a participant in the economy of a thriving interdependent free market.
Each Hacienda provides at least one product or service, and multiple products or services are welcome.

As of this Sol, the number of plots established in Sagan City (2018) is: > 1 (inventory pending) [Thanks to everyone who registered!]

Recruiting Announcement: People are needed to participate in the Sagan City (2018) Virtual Community

The concept is to imagine life on Mars at the level of current 1st Tier civilization on Earth.  This community is assumed well past startup phases.

The objective is to gain a clear understanding of the operation of market forces in a community of 2750 plots.  Community members have needs.

The market is there to meet those needs.  The first step is to identify the needs.

I'd like to thank the members of the Mars Society whose financial support allows the NewMars forum database to flourish.

Recruiting Section for NewMars Forum:

Several initiatives are underway, and opportunities exist for volunteers with appropriate education, skills, talent, motivation and generosity of spirit:

1) kbd512 recently initiated a proposal to launch a vehicle from Earth using US Navy style electromagnetic acceleration
The discussion is progressing after moving from Human Systems to Science and Technology
  kbd512 is holding to the position that the launch should deliver velocity of Mach 5 or 6 at the surface of the Earth
2) Calliban has been working for some time on an outreach goal of capturing/mining an asteroid. Recent activity includes cocoon wrapping.
There are a number of possible approaches to the challenge of wrapping an asteroid in basalt thread.
3) Calliban has also proposed the use of electromagnetic acceleration of mass from the Moon. This is NOT the Gerard O'Neill mass launcher.
  There may be some overlap for a Moon launcher with discussion of an Earth based launcher. Both would use sled based launch vehicles.

[Synchronization of Week days]

37 * 7 is 259.  However, 687/4 is 171+, so at least one End of Quarter will occur during a given rotation of Week Days.

The effect of an End of Quarter event in the proposed Mars Calendar is to increase the effective count of Earth days between Synchronization events to:

Note: the above statement could be incorrect.  Verification is needed.

37*8 or 296 days between Synchronization events if there is only one End of Quarter during a rotation of week days.

However, ** two ** End of Quarter events can occur in a given rotation of Week Days, so the total elapsed count could reach 37*9, or 333

[/Synchronization of Week days]

[Automation of Preparation of Today on Mars]

Automation of the process of creating the daily report "Today on Mars" is possible, but it will require development of capabilities in software not currently available to NewMars.com/forums.  The process of creating the daily post includes updating the primary post (this one #82) and that involves performing two lookups of reference web sites.  The daily post is then prepared by performing a copy and paste operation, using text from the primary post and inserting it into a new empty post in the Today on Mars series.

The French reference web site provides the four data points that are at the heart of the report ... the Sol number on Mars, location in it's orbit, and the Year

The Sky Live web site provides precise Sun Distance, Earth Distance and precise location information as seen from Earth.

An automation would be able to collect the data from the two web sites and blend it into the Primary Today on Mars record, and then create the extract for the daily post itself.  That would be a nice piece of work.

Edit_20210327: The process of automation of the preparation of TodayOnMars begins earlier than reported in the opening summary above. The first step is to establish a connection to the NewMars server.  The procedure to do that is well established, but it requires adding functionality called Oauth, which is a way to connect to an online resource without storing the logon password in the application.

After that, the first step is to find the record to be updated (ie, this post #82 in the Holidays topic)

Details to be added; specific lines in Post #82 that are modified each day.

Update daily:
Today on Mars: 0036/02/18 Wednesday <<-- Days of the week are not in alignment with Earth. 
Update daily:
Today on Earth: 2021/03/26 Friday (Earth Date) Post Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]
Check daily - update every astronomical month
Martian Year: 36  Martian Month in 1 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees
Update daily:
Solar Longitude: 022.3  Sol Number: 46  Change in degrees is +.4
Previous SL:      021.9  Previous Sol: 45
Update daily:
Distance: Mars >> Sun per theskylive.com:   240,864,478 km [22.8 km/s] Difference is +140694 <= 6117 km/hour at 7.5 on 03/26 (time:7:30)
Distance: Mars >> Sun per theskylive.com:   240,723,784 km [22.8 km/s] Difference is +144725 <= 6159 km/hour at 8.5 on 03/25 (time:8:30)
Distance: Mars >> Sun per theskylive.com:   240,579,059 km [22.8 km/s] Difference is +151936 <= 6201 km/hour at 9.0 on 03/24 (time:9:00)
Update daily:
Next up: Star TYC 1831-1062-1 Magnitude 9.66 above path Day 0 about 10 hours ahead
Next up: Galaxy PGC 1696189 RA 4h 45m 41.8s above path Day 0 about 6 hours ahead
TYC 1830-1893-1 Magnitude 11.86 Day 1 above and about 8 hours behind - likely last day for 1893
Bright TYC 1830-2110-1 Magnitude 9.55 Above path Day 1 - at edge of view - last day for 2110
Update daily:
However, in recent days, the curve has been slowly bending down toward horizontal.  Earth Distance at last update (here) was km 255,818,745
Update at minute delay changes:
Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ minutes round trip. [14:252,000,000] [15:270,000,000]
Update daily:
Sol 046 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Check daily, update monthly:
Month 02 extends from Sol 029 through 56. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Update daily:
Sol 046 is Wednesday  in the Proposed calendar for Mars.  <<== Skip day occurred February 4, 2021 on Earth and again on February 11, 2021
Check daily, update annually.
The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year is 36.

[/Automation of Preparation of Today on Mars]

The purpose of this series is to try out a concept for a reliable, practical business calendar.

A reliable, practical calendar is essential for a civilization on Mars.

(th)

Last edited by tahanson43206 (2020-09-20 06:12:46)

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#83 2019-01-20 13:26:38

RobertDyck
Moderator
From: Winnipeg, Canada
Registered: 2002-08-20
Posts: 6,742
Website

Re: Holidays

This thread was started to talk about holidays, not a calendar. I pointed out Christmas as we know it has only existed for a very short time. Christmas is blatantly commercial, an attempt to sell crap that people don't need to fleece them for money. And no, it isn't the birth of Christ, because Christ was born some time in spring. It was originally a celebration of the winter solstice, an attempt to lift spirits so people don't get depressed over the bitter cold, short days, and lack of any green plant life. Saint Nicholas was bishop of Myra, lived 270-343 AD, and gave warm winter clothing and food to the poor, he didn't give toys to anyone. Europe had a celebration of "Father Christmas" in the 16th century, but the character was quite different. North American only started to celebrate Christmas in the 1800s, and "Santa Claus" was an advertising gimmick created in 1931 to sell Coca-Cola. I suppose you could go back to the originals: Roman Saturnalia, Celtic Yule. But the commercial "Christmas" is ridiculously wasteful, with an emphasis on giving expensive toys that Martians will not be able to afford for many generations.

Halloween was created to end "Gate night". Young people committed vandalism, causing massive property damage. Again, it has become excessively offensively commercial. We could talk of the Celtic tradition of Samhain (pronounced saw-win), the original it's based on. But Halloween has become training to teach young people to become door-to-door salesmen. When was the last time anyone saw a door-to-door salesman?

Mars will have it's own holidays. Yes, one problem is calendar based holidays don't fit on a planet with radically different length of year and seasons. That's how this became a calendar discussion.

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#84 2019-01-20 15:30:26

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 7,298

Re: Holidays

For RobertDyck ... Thanks for the course correction!  It was clearly needed. (th)

RobertDyck wrote:

This thread was started to talk about holidays, not a calendar.
...
Mars will have it's own holidays. Yes, one problem is calendar based holidays don't fit on a planet with radically different length of year and seasons. That's how this became a calendar discussion.

The daily calendar update was moved to an already existing topic.

Edit#1 on 2020/11/16:

Checklist for Daily Mars Calendar update

1) Open 82 for edit, using Search for s e a r c h t e r m: and :t o d a y o n m a r s by tahanson43206
2) Update field: Today on Earth:
3) Update field: Today on Mars:
4) Update One day note:
5) Copy Longitude and Sol from current line to previous line
6) Update Longitude and Sol # using web site: Convert Earth Date to Martian Solar Longitude
7) Advance to line: Sol ### is in Month ## ... update this line as needed
8) Advance to Month ## line ... update this line as needed
9) Advance to Sol ### is aaaaaaaa ... update this line as needed
10) Advance to current month array to verify day of the week
11) Return to Star/Galaxy section ... Open theskylive.com to Mars
12) Update Star/Galaxy section as needed
13) Return to Distance of Mars section and update as needed
14) Delete oldest Distance of Mars line
15) Select text for next daily post and copy
16) Save 82
17) locate yesterday's daily post
18) Post new daily
19) Confirm
20) Log out


(th)

Last edited by tahanson43206 (2019-06-01 07:21:07)

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#85 2019-01-20 16:04:58

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,078

Re: Holidays

As Robert is point out in holidays the history plus its distortion of its means over time have created under commercialism what we now observe are more of a fake than what really happend or what was being done.

As much as we would think, that what we celerbrate is seperate from a calendar we have been the ones which can not live without a date book now.

Which is the information in post 80 links.

I also see that religion also is playing a part in celebrations as well for christmas.

The mars calendar and celebrations there in have yet to be created for State, Federal designations for what they would have for days to behappy about.

Even TAX day is maked as an observable but no one has it as a holiday.

Will mars use a daylight saving shift of time?

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#86 2019-01-20 21:49:26

IanM
Banned
From: Chicago
Registered: 2015-12-14
Posts: 276

Re: Holidays

I agree that holidays have been quite commercialized here on Earth, and I expect a similar process, if not nearly as intense, to happen on Mars over time as well. That said, holidays in general are a crucial part of a society. I'm not sure if I said this earlier, but I'd expect the solstices and equinoxes to be prime candidates for holidays on Mars. I would rather Mars not use Daylight Savings Time, I think it's a rather needless complication.


The Earth is the cradle of the mind, but one cannot live in a cradle forever. -Paraphrased from Tsiolkovsky

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#87 2019-01-27 17:17:08

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,078

Re: Holidays

The other day I was shopping in a local Dollar Tree store and noticed as I proceeded down the aisle just browsing that the first one has Saint Patties day items, in the next was Valentines day chocolates and in the next was Easter stuff for you to buy. With just as soon we will be into others as soon as one passes by. With the seasons changing and another shelf is yesterdays junk...

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#88 2019-01-28 20:21:46

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,078

Re: Holidays

I know this topic started out complaining about the commercializing of Earth holidays and went to the future state of mars with would could be...
This forum topic does have a couple of article in explorations to write cover stories to which I think could be done.

1 How would a mars settlement or colony develop a tradition of holidays and how would they relate to Earths?
2 Definitely how would Mars society like to celebrate a new year for Mars?
3 There are several calendars out there as it would seem but it would seem there are no holidays to the structures of them.
4 The contest art and creation of a 2 year calendar by kids all over would be an interesting out come as to what they think mars is.
5 If Mars society would want to celebrate with a mars city or towns there seems to be several to consider even with Marvin the martian and aliens aside or change to celebration format.
6 My final thought would be to look at the holiday and future state of mars commerce once we are there for an article.

Myself I think the change might come from the movie the martian instead of the aliens or marvin the martian for something that we could focus on. It could come from the many rovers, satelites probes and so forth for targeted writing of articles.

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#89 2019-01-28 20:40:39

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,078

Re: Holidays

Mars celebrations...
Residents of the city of Mars, Pennsylvania, celebrate the Martian New Year with a two-day science, technology, engineering and math festival, ...

Nasa did not seem to mind the aliens
https://www.nasa.gov/press-release/nasa … nnsylvania

https://www.youtube.com/watch?v=FF8k9NWaRuw

I think this page has the mayor information
http://marsborough.com/gearing-up-to-pr … r-in-2019/

http://marsnewyear.com/

Seems the school waits until its a bit warmer..
https://www.marsk12.org/apps/events/201 … 079/?id=10
6/1/2019
https://www.marsk12.org/ourpages/auto/2 … 202019.pdf

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#90 2019-01-29 18:25:09

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,078

Re: Holidays

List of topics which are impacted by time decisions, a desire to stay to create a new home and how it will be safe.

Naming the first city on Mars really is the mark of a calendar of life.

Where that first city might be called Sagan City - what will be there? Which sort of starts us down the path of wanting to do what we do here on Earth but only on Mars as we live and breath.

That brings up how will we start to make First settlements come to be aMars City - Your visionor for how  A City Rises on the Plain as we will see the effects of seasons on those that are there with more longing for home for some. The total picture of how we will get there as a Human Business plus flight plan for mars and why we will be there will come from the means whether this be from a Mars exploration consortium or from Space X to Lead Mars Consortium plan, an agency or partnerships or from a corporate Government method to self fund your ticket there when Elon Musk: ticket to Mars for $500,000. Of course there will be more activity to do beyound science and it could be Mars revenue raising activity or some other entrepreneur - funding ....

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#91 2019-01-29 20:12:25

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,078

Re: Holidays

A lot of people think of Antartica as being simular to what Mars would be in terms of isolation, not nature ability to grow food in the open, a crazy time schedule for day and night; so for those that have been there how would they handle doing holidays?

Do they have a time schedule clock issue?

How would items made for the holidays on Earth arrive in time to not be yesterdays junk from Mars...

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#92 2019-01-29 22:28:14

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 7,298

Re: Holidays

SpaceNut, your mention of Antartica led me to look for write-ups on the bases.

https://en.wikipedia.org/wiki/Amundsen% … le_Station

The information about time is at the very bottom, just before references.  The base uses New Zealand Time, primarily (I gather) because air schedules are scheduled with Christchurch.

The article mentions efforts to grow plants, which may be a luxury there but which would seem (to me at least) essential for a Mars settlement.

I met a gent who spent at least one year serving as an IT specialist in Antarctica.  He is currently working for Redhat, as a consultant. 

He is rarely back in town, due to his travel schedule, but if I ever see him again at a monthly meeting he runs, I'll ask him about how his experiences might inform his projection of what a Mars base might be like.  Most months he asks a local member to fill in for him.

(th)

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#93 2019-02-02 09:41:56

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 7,298

Re: Holidays

In recognition of Holidays ...

In the United States, today is widely celebrated as Groundhog's Day.  The day has an astronomical origin, since it marks the midpoint of the winter quarter, when the worst of winter weather is likely to be depressing spirits.  I would like to think that the concept of celebrating the equivalent point in the winter quarter of the Mars orbit might become popular, but the nature of the celebration is likely to differ from the terrestrial model.

In the United States, Groundhog's Day is generally celebrated in a spirit of good humor.  There is very little commercial exploitation of the day, although there is certainly a certain amount of self-promotion of various communities.

(th)

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#94 2019-02-02 17:27:14

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,078

Re: Holidays

It is marked with a shadow 6 more weeks or winter snow and cold or a coming of spring early if not seen. Febuary is usually one of the coldest wind chill months for this state of NH.

I think that you are right in that the day for mars will be different from the earthly one but it still will be placed in the winter for mars months.

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#95 2019-02-13 19:37:56

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 7,298

Re: Holidays

Update regarding gent who worked in Antarctica ...

The gent who worked in Antarctica was in town for the monthly meeting today (2019/02/13)  He agreed to respond to questions from Forum members, and submitted an application for membership in the forum. 

He reminded me that his experience was ten years ago.  My guess is that not much would have changed.  He did agree that the Antarctica station is a good model for what might be expected on Mars in early years.  He also said that (if I heard correctly) NASA has deployed at least one person to study the Antarctic station for a number of years.

I assume there is a delay for review of applications, since the application did not show up immediately.

(th)

tahanson43206 wrote:

SpaceNut, your mention of Antartica led me to look for write-ups on the bases.

https://en.wikipedia.org/wiki/Amundsen% … le_Station

The information about time is at the very bottom, just before references.  The base uses New Zealand Time, primarily (I gather) because air schedules are scheduled with Christchurch.

The article mentions efforts to grow plants, which may be a luxury there but which would seem (to me at least) essential for a Mars settlement.

I met a gent who spent at least one year serving as an IT specialist in Antarctica.  He is currently working for Redhat, as a consultant. 

He is rarely back in town, due to his travel schedule, but if I ever see him again at a monthly meeting he runs, I'll ask him about how his experiences might inform his projection of what a Mars base might be like.  Most months he asks a local member to fill in for him.

(th)

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#96 2019-02-13 20:45:07

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,078

Re: Holidays

That sounds good and hope that Antartica information will help to inform us all.

It will be nice to see how the life of a member works to do the science and still enjoys being there.

I had a post to add but have forgotten it for now.

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#97 2019-04-27 11:24:38

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,078

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#98 2019-05-27 06:19:25

SpaceNut
Administrator
From: New Hampshire
Registered: 2004-07-22
Posts: 23,078

Re: Holidays

Today is the Memorial day celebration on Earth with the official day on the calendar holiday is observed on the last Monday of May but will those which go to mars feel the remembrance is warranted on mars still?

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#99 2019-05-27 07:16:17

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 7,298

Re: Holidays

For SpaceNut ...

Is it possible Martians may set up an Earth Remembrance Sol?    That way, they could pack all the holidays celebrated on Earth into a single day.

That day might arise naturally from First Landing Sol.

Best wishes to everyone who lost a family member to military service.

(th)

SpaceNut wrote:

Today is the Memorial day celebration on Earth with the official day on the calendar holiday is observed on the last Monday of May but will those which go to mars feel the remembrance is warranted on mars still?

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#100 2019-05-27 14:54:44

Terraformer
Member
From: Logres
Registered: 2007-08-27
Posts: 3,362
Website

Re: Holidays

Isn't that an American holiday, not an Earth holiday?

Will they mark Armstice Day? I suppose it depends on who settles Mars. China declared war very late and didn't actually fight in WWI.


"I guarantee you that at some point, everything's going to go south on you, and you're going to say, 'This is it, this is how I end.' Now you can either accept that, or you can get to work." - Mark Watney

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