Harold Corwin

Kobold's original observation was not a careful micrometric offset, but an estimate appended to his description of NGC 3937: 12.7 seconds preceding, 16 arcsec south (the actual offsets are 12.1 seconds preceding, 21 arcsec south, based on Guide Star Catalogue positions for the two galaxies). Nevertheless, his offsets are good enough to unambiguously identify the galaxy.

How Vorontsov missed it is a mystery to me. He lists the galaxy in the MCG notes (without the IC number, of course), yet -- in spite of the explicit note in the IC description -- he incorrectly makes it identical to NGC 3937. RNGC, UGC, NGC 2000.0, and PGC all copied his incorrect identification. The CGCG misidentification of IC 2968 as IC 2958 (either a copying error or a typo) is an unfortunate coincidence: this led to Nilson's giving that number to the galaxy in the UGC notes, and undoubtedly reinforced in his mind the incorrect MCG identification which he repeated, albeit with a query. The UZC, of course, also copied the incorrect IC number from CGCG.

― IC Notes by Harold Corwin

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