Harold Corwin

IC 1671 = IC 93. Here is a galaxy that Swift found twice, once in September of 1889, and again in December of 1895. His positions are far enough apart (35 seconds of time, and 1.8 arcmin) that he and Dreyer thought that the two objects were different. On the second night, Swift also found two other galaxies nearby (IC 1667 and IC 1670), reinforcing his belief that he had not seen IC 1671 before.

However, both of his descriptions mention the 7th or 8th magnitude star 47 seconds following and an arcmin north (the first IC has this as 14 seconds, but Swift's 9th list has it correctly printed as "46 seconds"). This star alone secures the identity of Swift's two objects.

Swift has some further confusion in his description, however. He calls this the "p of 2", while it is clearly the "f of 2" by the numbering and RA's in his 9th list. He calls IC 1670 the other member of the pair, but that is 15 arcmin north. I think that he meant to have IC 1667 as the actual preceding of the pair, as that is just 5 arcmin west-northwest of IC 1671.

― 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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