February 15, 2011

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Wallology

LPOD-Feb15-11.jpg

image by Damian Peach, U.K.

A strong libration lets us peek around to the farside, and rotates craters Earth-ward so we can see more of their floors.
But as Damian's image of Humboldt shows, an unfavorable libration presents a nearly profile view of crater walls. We
see the scarp-like wall on the right without vertical exaggeration and realize that is is an imposing feature. In fact, it
would be a great obstacle if you happened to be on the floor of the crater and needed to get out. But the left wall is
lower and the wall between seems very much lower and probably full of passes that would permit entry and exist. An
oblique perspective Chuck Wood

Technical Details
Feb 8, 2011, 17:55 UTC.

Related Links
Rükl plate 60
The Lunar Orbiter mosaic of this area is poor - I await an LRO WAC mosaic to decide if the low spot is due to an
overlapped crater or some other oddity - it doesn't look like an oblique impact.

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