Harold Corwin

IC 5191, IC 5192, and IC 5193. These are three nebulae credited to Barnard (in AN 4136). Dreyer did not give individual positions to them as Barnard did not provide them, either. Instead, Barnard merely published a sketch of six nebulae (two being NGC 7240 and NGC 7242, four being "new") along with the claim that he made the observations in 1888. Dreyer, realizing that IC 1441 must be among the six, only listed three as new. One other new object was found here by Bigourdan, and this has received the number IC 5195 (which see).

To sort out which numbers apply to which objects here, we need to identify the previously known nebulae. The two NGC objects are no problem, nor are Bigourdan's two "novae" (IC 1441 and IC 5195). Having pinned these down, and noting that IC 5195 was not seen by Barnard, we are left with the other three objects in Barnard's sketch. I've assigned the three IC numbers as Dreyer would have, in RA order.

The only remaining question concerns the nature of IC 5192. On the Palomar Sky Survey, it looks like three or four faint stars plus a galaxy (MCG calls it a "group"). The less deeply exposed CCD image in John Vicker's northern Deep Space CCD Atlas also suggests that the object is a galaxy surrounded by three or four stars. Steve Gottlieb's observation of the group confirms this. So, I'm inclined at the moment to say that IC 5192 is a galaxy plus the stars, as Barnard's sketch shows only a nebula in this position.

― IC Notes by Harold Corwin

Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.

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