Harold Corwin

These are two galaxies near Royal Frost's positions and matching his descriptions. They were, however, misidentified in CGCG and that confusion has carried on into the more recent catalogues and databases.

CGCG picked up a pair of galaxies in the area. It mistakenly called the brighter galaxy (CGCG 1439.3+1846) IC 4486, leaving IC 4487 to go on their other galaxy (CGCG 1439.5+1847). Frost's description of the southwestern object, however, "vF and dif[fuse], R, 0'.2" makes clear which object he was seeing on his 4-hour Bruce plate. His description of the northeastern galaxy of his pair, "F, R, lbM, d 0'.1" is also appropriate. I think that he missed the brighter CGCG galaxy southwest of IC 4486 because it appeared stellar on his plate.

In short, there are three galaxies here. The northeastern pair is included in the IC, the southwestern pair in the CGCG.

This is another set of identification problems kindly sent to me by Courtney Seligman.

[As Corwin warns SIMBAD equates IC 4486 to PGC 52481 not to the correct PGC 52496]

― IC Notes by Harold Corwin

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