Evidently, M102 is the last possibly `missing', or doubty, Messier object. This means that two opinions on the identity of this object are common:

1. M102 may be a duplication of the Spiral Galaxy M101 (NGC 5457) in Ursa Major, due to an error of either the catalog author Messier, or its `discoverer' Mechain.
2. M102 may be the Lenticular Galaxy NGC 5866 in Draco, also sometimes called the Spindle Galaxy, as Messier's catalog description indicates, together with the position he added later by hand.

The authors of this page think that there is enough evidence that both Mechain and Messier have probably observed NGC 5866 in context of this catalog entry. Therefore, it should be considered to take this last missing object back into the catalog.

Please note our discussion of more details on this topic.

Last Modification: 7 Apr 1999, 12:32 MET