On Sun, 2014-06-22 at 08:32 -0700, Bernard Miller wrote: > Tom, > > Thanks. I wonder why a "knot" got its own NGC number? NGC 5906 is simply the part of the galaxy on the west side of the dust lane. The proper name for the galaxy used throughout the amateur and professional literature is NGC 5907. See the notes section for NGC/IC objects at Harold Corwin's Web site, which was updated last month: http://haroldcorwin.net/ngcic \Brian -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.