Paul, I'm at about the same stage as you in relation to double/binary observations. I stumbled on to a great group of doubles observers who crank out a fine little newsletter dedicated to all aspects of doubles. It's cheap too. You will find them at <A HREF="http://www.chara.gsu.edu/DoubleStars/tanguay.html"> The Double Star Library: Newsletter</A>. Good luck. Chuck Layton Laytz@aol.com