Tuesday, April 4, 2017

Lunar X

Last night I finally got to see my first Lunar X. I've heard about it several years ago but never got around to try to see it or take photos of it. The weather was very frustrating with clouds constantly passing in front of the Moon, but I managed to get some shots of the X after it appeared. The X was such a beautiful sight through my viewfinder, it was more prominent than I ever would have thought.

This feature is actually the overlapping convergence of the rims of Blanchinus, La Caille and Purbach craters and there's only a small window in time where in Lunar X is visible. It's visible about six hours before 1st Quarter phase (Depending on the lunar libration), and for about an hour, the silver-white X will appear to float just beyond the lunar terminator as in this photo. So I'm really glad I got the chance to get this X on photo and to see it.

Nikon D500, Nikon AF-S 600 mm f/4 with 1.7X converter
Exposure: 0.4 sec. ISO 100 at f/8.0



















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