By Patricio Leon | 2024-10-09
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“X” (and “V”) marks the spot!
On 10/09/2024 08:13 pm by Lisa Ann Fanning| Monmouth County, NJ
Two of my favorites (okay, I have many) - but these are a treat to spot - Lunar X and Lunar V.
Per Wikipedia: “The Lunar X (also known as the Werner X) is a clair-obscur effect in which light and shadow creates the appearance of a letter ‘X’ on the rim of the Blanchinus, La Caille and Purbach craters.”
“The X is visible only for a few hours before the first quarter, slightly below the lunar terminator. Near to the X, the Lunar V is also visible, formed by Ukert crater and several other small craters.”