Lunar X and V – Terminator Shadow formation Timetable


Lunar X and V

Lunar X and V
These are famous optical features on the moon, visible through telescopes.
When the terminator or line between light and dark on the moon,
which is located in just the right place, it appears as the letter X and V
on the moon’s surface.

2024 Lunar X and V
Seven months of 2024 when the X and V are visible. However, as stated above, Clair Obscur effects are difficult to observe on a daytime Moon, but they are also harder to observe when the Moon is very low because of atmospheric disturbances.
(Thanks to Mary McIntyre FRAS for her blog.)


2024 Timetable – Visibility Timetable

  • Wednesday 18th January  –  09: 00am UT
  • Sunday 17th March  –  14:00 / 2pm UT
  • Tuesday 15th May  –  15:00 / 5pm BST
  • Friday 13th July  –  16:00 / 4pm BST
  • Monday 10th September  –  13:00 / 1pm BST
  • Wednesday 10th October  –  10:00 / 10am BST
  • Thursday 8th November  –  13:00 / 1pm UT


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