Jonathan - You asked: >Does anyone know the apparent magnitude of Comet Wirtanen? According to the 'Comet Comments' newsletter put out by Don Machholz, on February 21st, the mag. of Wirtanen will be about 10.6 By the way, Machholz now has a web site, where his monthly newsletter is posted: http://members.aol.com/cometcom/index.html - Cathy