October 15, 2020
Originally published April 10, 2011
image by Bob Pilz
Do you see three basin rings here? Look closer. And step back for a more synoptic stretching from Theophilus to Fracastorius. In fact, if this ridge ring is the boundary of an inner area of collapse to a lower level (as at Crisium) it might explain what happened to the missing northern arc of Fracastorius' rim.
UD: 2008/08/19, UT: ~07:45. 200mm f/6 Newtonian, Televue 3X Barlow, DMK 31 camera, Green Filter; 15 fps, Exposure 1/38sec, 400/9000 frames. Reprocessed by Registax V6, PS CS4, FocusMagic. Taken from Lat: 35 degrees 36 minutes N, Long: 82 degrees 33 minutes W, Elev: ~850m
Rükl plate 59
Yesterday's LPOD: Panorama
Tomorrow's LPOD: Inspired To Go Ot