Harold Corwin

IC 2167 = IC 446. The same two objects were apparently discovered twice by Barnard (the second is IC 2169 = IC 447, which see). In this case, there is no question about the correct object even though neither of Barnard's positions is particularly good -- it is a star immersed in diffuse nebulosity. Barnard notes this star both times around, and I've adopted its position for the table. The apparent size of the nebula is about 5 x 5 arcmin.

One thing I find puzzling is that Barnard does not mention the line of stars just south of the bright central star. Perhaps they are not eye-catching enough at the eyepiece, or perhaps they are lost in nebulosity on Barnard's plates (if he in fact found the nebula photographically). Whatever happened, these stars show well on the DSS.

A few years after I wrote the paragraph just above, I was directed back to this field by Dave Riddle (his question actually involved IC 443 and IC 444, which see). He was kind enough to send a copy of Barnard's first discovery note published in "Astronomy and Astro-Physics", Vol. 8, No. 3. There, Barnard clearly describes not only NGC 2245 and NGC 2247, but also IC 446 and IC 447 as seen on a plate taken with a 6-inch Willard lens. Barnard later published the plate in Lick Publications, Vol. 11 as Plate 28 (the region was also covered by Plate 29).

― IC Notes by Harold Corwin

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