Hi all, Rima Hyginus coming into view a couple of nights back. The rima or rille is 219km long and the crater, Hyginus, lies in the middle of the rille. It is 9km wide and thought to be a collapse pit rather than an impact crater, as are the other smaller pits along the length of the rille. The prominent crater to the right of the picture is the 38km wide Manilius. The 48km wide crater, Agrippa, only gets half it head into the shot at lower left. The dark expanses top left are Sinus Medii and top right is Mare Vaporum..
Hyginus was a Roman intellectual appointed by Augustus as librarian to the Palatine library and author on many topics including astronomy (of course!).
Manilius was a Roman astrologer who is thought to be the first recorder of the notion of zodiacal "houses".
Agrippa was an ancient Greek astronomer whose claim to fame is that Ptolemy gives him a guernsey as an observer of the occultation of the Pleiades by the moon.
22" F4.5 Newtonian, DMK21 camera, stack of approximately 500 images of 2,000
