Harold Corwin

IC 652 = NGC 3421. Even though these numbers refer to the same galaxy, the nominal positions are 25 arcmin apart on the sky. Common's position for the NGC number is 13.5 arcmin too far north (and is actually a mean position for this and its companion, NGC 3422), while Javelle's is 11.5 arcmin too far south. Common's position is a crude estimate from his setting circles, while Javelle's is, like all of his, micrometrically measured.

Unfortunately, as he sometimes did, Javelle misidentified his comparison star. Rather than being BD-11 2960 as he claims, it is actually BD-11 2959. Once the right star is used for the reduction, Javelle's position falls within five arcsec of the nucleus of the galaxy. The identity is certain.

― 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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