Monday, 18 February 2013

Lunar X

I've wanted to sketch the lunar X for a while now so last night I set my 4" Lyra up with plenty of time to spare.
The position of the X was easy to find even early in the evening before it showed, Werner crater is directly below the X with Aliacensis below that again, the large crater to the side is Playfair G.
The actual X is made by sunlight falling on the crater ridges of La Caille, Blanchinus and Purbach.

Telescope / 4" f/11 Lyra
EP / 3-6mm Nagler zoom at 5mm x220
2140 UT - 2235 UT
Temp 3˚C
Transparency / Excellent
Antoniadi III
Colongitude 357˚
Phase 90˚
Lunation 7.53 days

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