Observing Log for Mike Durkin 12/12/2010 about 11:00PM-2:00AM Locust Valley, NY Transparency: ?/10, Seeing ?/5 Equipment: Hutech modified DSLR camera Took some pictures of the stars in Ursa Major to try to calculate extinction coefficient and also to see if magnitude measurements wouldmatch up with some of the catalog values I found. Other Log Entries <-- 2009 Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec   2011 -->