2025 Lunar X Predicted Start Times

[67champ]

2025 Lunar X Start Times using -.90 Sun alt over the “X” location.

Jan 06 1714 UT
Feb 05 0813 UT
Mar 06 2254 UT
Apr 05 1247 UT
May 05 0135 UT
Jun 03 1320 UT
Jul 03 0015 UT
Aug 01 1047 UT
Aug 30 2126 UT
Sep 29 0846 UT
Oct 28 2109 UT
Nov 27 1045 UT
Dec 27 0123 UT

Dana T

[Matthieu (Matt)]

Thanks Dana!

I observed it twice over the last few months (I think September and November). It seems to alternate hemisphere each month. I missed the sweet spot both times so only had 75% of the x illuminated.

To work out VIC/NSW times, it’s +10 hours for AEST and +11 hours for AEDT.

[Stonius (Markus)]

Originally Posted by Matthieu

Thanks Dana!

I observed it twice over the last few months (I think September and November). It seems to alternate hemisphere each month. I missed the sweet spot both times so only had 75% of the x illuminated.

To work out VIC/NSW times, it’s +10 hours for AEST and +11 hours for AEDT.

How does it alternate hemispheres each month? Isn't it a fixed geographic feature?

[EpickCrom (Joe)]

Great info here guys.

I love observing lunar X and lunar V simultaneously. Always a treat!

Clear Skies
Joe

[Matthieu (Matt)]

Originally Posted by Stonius

How does it alternate hemispheres each month? Isn't it a fixed geographic feature?

Hey Stonius,
Good question, I had guessed wrongly that visibility changed based on the hemisphere of the observer because I knew that when the Actual Astronomy podcast guys see it in Canada, we don't see it here. But it would make more sense for it to be an outcome of the moon's full orbit not quite aligning with the same time of day on earth. So it would be more of a longitude issue then.