The Lunar "Doughnut"

The Lunar Doughnut is a rare shadow feature that looks like a grey crater with a dark center, in an area without any significant crater feature. This sketch shows the crater Janssen near the south-eastern limb at the top of the sketch.(South is up). Below Janssen are the craters Steinheil and Watt, and the eastern rim of Fabricius. Vallis Rheita and Metius are next, then the lunar doughnut feature flanked by Rheita "E" and Neander. Below these are craters Reichenbach "C", Reichenbach and Stevinus. (RUKL 68, 69 and 76) Telescope: 10-inch f/7.3 reflector, 132x 01/06/03 5:50 PST. 01:50 UT 1/7/03, a four-day old waxing crescent moon.

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