>> Tau Canis Majoris is composed of the >> longest period spectroscopic binary and the shortest period eclipsing >> binary known. This claim must be just for O-type stars, since there are plenty of other sorts of stars with periods longer/shorter than the values given. In re NGC 2527, I have a file of the 45 or so stars in the area that have been observed photometrically here: ftp://ftp.lowell.edu/pub/bas/ocpos/n2527.pos This includes accurate coordinates for all the stars and BV photometry, so one could make a plot from these to show the asterism Bill mentions. Apparently the group is not a physical cluster. \Brian -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.