July 31, 2012
Ghost with Color
image by Yuri Goryachko, Mikhail Abgarian, Konstantin Morozov, Minsk, Belarus.
Like a ghost in a sheet, a vague grey marking seems to flow in from the southeast across Lamont. The bottom
side of the sheet marks the boundary with smaller mare ridges although the massive ridge near Sabine extends
beyond it. Bending to north the brightness edge follows an inflection point in the surface topography; to the west
the land slopes downward to the east and levels out at the bright area. On the opposite, northeast side of Lamont
the boundary is much sharper under high illumination, looking more ragged when the Sun is low. All of the ridges
on this northeast side cross through the albedo boundary. On the south and southwest side it looks like the darker
mare lavas are imposed on lighter ones and thus the darks would be younger lavas. This would mean that the
brightness variation isn't due to ray-like material. An old Clementine color mosaic shows that the light and dark
lavas have different colors and hence compositions.
Chuck Wood
Technical Details
Low SUn view: July 9, 2012 02:12UT. Maksutov-Cassegrain Santel D=230mm F=3000mm, Mount WS-180GT,
Filter: Baader IR-pass 685nm+, Unibrain Fire-i 702 CCD b/w camera (IEEE-1394, 1388x1040),
Processing in AutoDtakkert!2. Deconvolution in Astra Image. Seeing 6/10, Trans 5/5.
High Sun view: July 7, 2012.
Related Links
Rükl plate 35
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