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2021 Lunar X Predictions (start times)

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#1 67champ

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Posted 31 October 2020 - 09:46 AM

2021 Lunar X Start Times using -.90 Sun alt over the “X” location (LAT -24.9/LONG .9)

 

Jan 20 1831 UT
Feb 19 0830 UT
Mar 20 2209 UT
Apr 19 1115 UT
May 18 2341 UT
Jun 17 1133 UT
Jul 16 2302 UT
Aug 15 1028 UT
Sep 13 2208 UT
Oct 13 1016 UT
Nov 11 2303 UT
Dec 11 1230 UT


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#2 Astroman007

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Posted 31 October 2020 - 10:04 AM

Thank you for sharing.



#3 67champ

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Posted 22 November 2020 - 09:11 AM

Thanks Martin.  It's one of the few astronomical things I do these days (make these predictions and promote Lunar X and Curtiss Cross viewing)..  

 

I beat beggarly to the punch this year.  LOL

beggarly, if you have time maybe you could post your timings for a fully formed "X" and see what the difference in time is...

 

dana t



#4 Dave Mitsky

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Posted 22 November 2020 - 12:27 PM

Thanks, Dana!



#5 beggarly

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Posted 24 November 2020 - 05:02 AM

Predictions calculated with LTVT. https://github.com/f...i/LTVT Download

 

Searching for Sun Angle = -0.9000° over feature at 0.900°E   25.300°S
Moon librations, elongation and percent illumination calculated for a geocentric observer

                           Sun Angle       Sub-Solar Point     Librations                 Phase  
   Date      Time UT   Altitude  Azimuth    Colong    Lat.    Long.    Lat.     Elong.   %Illum.    Age
20/01/2021  18:26:01   -0.9000   91.5976   357.603  -1.059    1.476   5.101     88.832   49.118    7.560  *+
19/02/2021  08:22:53   -0.9000   92.0856   357.395  -1.500   -1.874   2.325     85.309   46.047    7.554  *+
20/03/2021  22:01:49   -0.9000   92.0915   357.392  -1.506   -4.941  -1.016     82.329   43.458    7.487  *+
19/04/2021  11:07:44   -0.9000   91.6331   357.588  -1.092   -7.057  -4.157     80.489   41.866    7.359  *+
18/05/2021  23:34:50   -0.9000   90.8568   357.920  -0.390   -7.717  -6.299     80.161   41.581    7.191  *+
17/06/2021  11:27:56   -0.9000   89.9794   358.295   0.403   -6.757  -6.754     81.408   42.652    7.024  *+
16/07/2021  23:00:01   -0.9000   89.2284   358.616   1.082   -4.429  -5.202     83.973   44.872    6.905  *+
15/08/2021  10:28:05   -0.9000   88.7962   358.801   1.473   -1.273  -1.960     87.340   47.801    6.860  *+
13/09/2021  22:09:09   -0.9000   88.8023   358.798   1.467    2.110   1.965     90.816   50.835    6.887  *+
13/10/2021  10:17:39   -0.9000   89.2616   358.602   1.052    5.136   5.233     93.674   53.329    6.967  *+
11/11/2021  23:03:10   -0.9000   90.0647   358.259   0.326    7.192   6.777     95.304   54.749    7.075  *+
11/12/2021  12:28:11   -0.9000   90.9893   357.864  -0.510    7.741   6.239     95.365   54.806    7.198  *+

  * = Target feature on visible disk
  + = Azimuth of Sun within 5.00° of target (= 90.000°)

                      *** search completed ***

 

Attached File  LunarX 2021txt.txt   10.87KB   26 downloads

 

Earth viewed from Moon at the time when Sun angle is -1.0°:

 

 

Attached Thumbnails

  • Earth View0.jpg

Edited by beggarly, 24 November 2020 - 05:14 AM.

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