Lunar X is a “clair-obscur effect” where light and shadow creates the illusion of the letter ‘X’ on the rim of the Blanchinus, La Caille and Purbach craters.

Also visible is Lunar “V”, formed by Ukert crater and several other small craters.

Moon Phase: First Quarter 53%

iPhone 13 through Swarovski Optik Spotting Scope.