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IC 11

IC 11

History and Accurate Positions for the NGC/IC Objects (Corwin 2004)

IC 11 = NGC 281. IC 11 is one of Barnard's discoveries that he sent directly to Dreyer; it is not, so far as I know, in any of Barnard's published papers. Though included in Cederblad's catalogue of bright diffuse nebulae (and thus plotted in several atlases), it is not on the sky in Barnard's position. I have not found it on the POSS, nor on plate 89 of Barnard's own collection of comet and Milky Way photographs (Lick Publ. XI; 1913).

However, the triple star mentioned in the description suggests the identity with NGC 281, and makes the RA just 30 minutes of time too small. I suspect a simple transcription error on Barnard's part.

Historical observations

NGC/IC Dreyer (1888, 1895, 1908)

Given as "vF, L, triple * on np corner" with RA 00:13:00 approx. and NPD 34:11. The source is listed as only "Barnard."

Barnard, E.E. (1884)

New nebulae - Small black hole in the milky way - Duplicity of beta-1 Capricorni. Astron. Nachrichten, 108, 369-372. Bibcode: [1884AN....108..369B]

Object "a" at RA 00:46:30, Dec 55:58:00: "Large faint nebula, very diffuse, not less than 10' diameter. A peculiar object with a small triple star on its n.p. border."

Note the large RA difference between it, and IC 11.

Published comments

Cederblad, S. (1946) [VII/231]

Ced 2 (IC 11)

Position (1900): RA 0 15, Dec :+ 56 2

Star: ?

Spectrum of nebula: (not classified)

Classification: Nebulae without definite relation to certain stars - Background veil of a nebulous region (eg. the Taurus veil)

Size: (not given)

Notes: "IC 11. Disc. Barnard. R. Not identified. Probably of class C.2."

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