July 17, 2011

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A Morning Observation And a New Problem

LPOD-Jul17-11.jpg

left image by Maurice Collins, New Zealand, and right one from Eric Roel, Mexico

I observed the Moon this morning (Saturday) at 5:30 AM and immediately noticed a long crater
at the terminator. What was intriguing was that a massive central mountain stuck up into the
setting Sun while the rest of the crater, except the rim crests, were shadowed. And the large
peak complex wasn't centered, it extended a considerable distance to the north. From its size
and position I knew that the shadowed crater was Humboldt but I didn't know why the peak
was so "uncentral". Fortunately, Maurice Collins captured an image (left above) early Saturday
morning too, so I had his view to confrim my observations. And his image looks very much
like my view for he used a Meade 3" ETX and I obseserved with a 3" Orion Mak-Cass. And
then I found Eric Roel's image (right) from a 2006 Chuck Wood

Technical Details
Maurice's image: July 16, 2011, 1002-1031 UT. ETX-90 + LPI.
Eric;s image: March 3, 2006. 10″ f/20 TEC Maksutov + LU-075M camera, 100 frames from 3000.
Related Links
Rükl plate 60

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