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IC 5000 = NGC 6901. Since Marth's position for N6901 (which see) is off, Bigourdan did not find it at the NGC place. Near that place, however, he did find a nebula that he entered as B335 in his list of novae. Dreyer listed this as IC 5000 in the second IC. In fact, there is only one galaxy in the area, and Marth's and Bigourdan's descriptions make it clear that they both saw this same galaxy. My supposition in RC2 that this object is also = IC 1316 is incorrect; Bigourdan "saw" both IC 1316 (which see) and IC 5000 on the same nights. He also measured a star which he took to be N6901 (which see) on those same nights.
Lacaille's catalogue
The Messier objects
Dunlop's catalogue
The Bennett objects
The Caldwell list
Named DSOs
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