This is a low quality, poor seeing image of a crater ray entering C. Babbage, a 143km dia. northwest limb crater, taken 5/17/2008, 5:30UT. C. Babbage http://gallery.utahastronomy.com/main.php?g2_itemId=11281 Reference image - USGS shadow relief (LTVT aerial) http://gallery.utahastronomy.com/main.php?g2_itemId=11283 Misc. raw image 1 http://gallery.utahastronomy.com/main.php?g2_itemId=11285 Misc. raw image 2 http://gallery.utahastronomy.com/main.php?g2_itemId=11287 About three hours after this image was taken, Babbage looked more like Colin Evan's image, below, except that Babbage A (dia. 32km, depth 1.4km) occulted the Sun, casting a dark bar shadow across the crater's floor. This created an analogous inverse light-shadow pattern seen in my image above. The height of Babbage A's rim is not known. No high-skill amateur image of Babbage in a crater ray event was found in LPOD or Coppermine. Crater rays - that result from lunar sunrise piercing through gaps in crater rim walls - are some of the most visually dramatic events to observe on the Moon. A crater ray opportunity database, prepared by the Robinson Lunar Observatory (Kansas, USA) can be found at: http://www.lunar-occultations.com/rlo/rays/rays.htm - Kurt Fiducial amateur images By Mark Crossely 4/2006 http://lpod.org/coppermine/displayimage.php?album=4&pos=3 By Colin Evans 1/2007 http://lpod.org/coppermine/displayimage.php?album=4&pos=2 P.P.S. - Around 2:00am at a near full Moon, as I was closing the Ealing SPOC up, there was knock at the door with the voice - "Is the observatory open?" Turned out to be three Argentinian's with a Christmas Bushnell GOTO Northstar 90mm Mak and a copy of Skywatch. Good group of young guys in their mid-20s. They showed up intending to look for galaxies. Spent a couple of hours showing them the basics of GOTO scope setup, visual limiting magnitude vs. magnification and sky brightness. They intend to show up for next Saturday's SPOC public star party. If someone sees them, please take them under your wing.