Object name: NGC7686
NGC 7686 is an open star cluster in Andromeda. It was discovered by William Herschel on December 3, 1787. Its Trumpler class is IV1p. That translates into a star cluster of widely scattered stars of fairly even brightness with a low star count. For those not familiar with this classification scheme the Roman numerals range from I to IV indicating how concentrated and easy it is to separate the cluster from the background. With I being a very obvious cluster that stands out with a high concentration of stars to IV which is scattered and difficult to tell cluster stars from background stars. The numeral ranges from 1 to 3 indicating how similar in brightness the stars are with 1 being very similar to 3 being a wide variation. The last letter tells if the cluster is (p)oor, (m)edium or (r)ich in stars. The cluster is listed as being 15 minutes of arc across so all of it is in the image.