(M101 or NGC 5866)
Evidently, Messier 102 (M102) is the last possibly "missing", or doubty, Messier object. This means that, based on the observation record of his friend, Pierre Méchain, Charles Messier included this object in his catalog without verifying before publication, and it happens that Méchain's published position is erroneous. Two opinions on the identity of this object are common:
The authors of this page think that there is sufficient evidence that both Méchain 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: August 30, 2007