On the evening of Wednesday the 20th of January at 19.00 hrs,

there are 2 Clair Obscur effects visible on the first quarter Moon,

the lunar X is formed by the rims of 3 craters:-

la Caille, Purbach, & Blanchinus,

and the lunar V is near the crater Ukert

both of these effects will be visible along the lunar Terminator

if you plan to observe / image this event remember to dress for the conditions