August 24, 2018
Peaking Over the Limb
Originally published June 11, 2009
image by Mikhail Abgarian, Yuri Goryachko & Konstantin Morozov, Minsk, Belarus
Last week, LPOD featured a closeup view of the Humboldtianum Basin taken on May 29, 2009. The Minsk Miracle Imagers captured the same limb area two nights later when the libration was better. Their startling discovery is of a massive peak on the horizon. Yuri proposes that the mountain is the central peak of the farside crater Compton, and he estimates that the peak rises at least 2 km above the lunar horizon. I think Yuri's identification is correct because there is nothing else at that orientation beyond Humboldtianum, and the Minsk profile view matches the Clementine spacecraft plan view. It is remarkable, first of all, to be able to see this feature at 104° east longitude. And it is remarkable that the peak is so tall - it must rise significantly above its crater rim. Compton is actually not a normal impact crater, it is transitional to impact basins; a landform type that Bill Hartmann and I named central peak basins. I would not expect the peak to rise so high, but we have never had topography for Compton so we never guessed that it might be so tall. I am amazed!
UPDATE: Kostas Kalimaftsis wrote in the Comment section of this page that an earlier image he submitted to the LPOD Photo Gallery shows the peak and that he stated then that it was Compton, perhaps a high rim segment. Kostas was apparently the first to notice and identify this peak.
May 31, 2009 15:46UT. Maksutov-Cassegrain Santel D=230mm F=3000mm, barlow 1.9x + Astronomik Red filter + Unibrain Fire-i 702 CCD b/w camera (IEEE-1394, 1388x1040), Processing in Avistack and Maxim DL; Postprocessing in Photoshop. Seeing 7-8/10, Trans 5/5.
Rükl plate 7
NOTE - Visit the special LPOD Kaguya Impact page from yesterday afternoon!
Yesterday's LPOD: Color of History
Tomorrow's LPOD: Butterfly Wings & Railway Tracks