Thank you Brian, I shall append my notes. I notice that even though Megastar calls the association an OC, NGC2467, it also calls it Cr 164. That's more like it, when Collinder of 'Coathanger' fame, claims it. Jack > >> ...what is Sh2-311 referring to? Uranometria says 'Sh' > >> means the Sher catalog... > >> Megastar says it means Sharpless Bright Nebulae catalog... > >> Lorenzin says no, neither, NGC2467 is a Diff Neb and the OC is Haffner 18! > > NGC 2467 is just the large nebula and is the same as Sh2-311. The > original description just mentions the nebula. Visually there isn't any > real cluster here, though various stars around the bright one are part > of an association. Haffner 18 is not this cluster but instead a small > string off to the east side of the nebula. Very close is Haffner 19, > just northeast, a compact object that has a small nebula surrounding it > as well. 'Sh' = Sharpless, not Sher. I think there is perhaps a single > far-southern cluster reported by Sher, but that is all. > > \Brian -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.