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RA: 04h 57m 44s
Dec: −66° 27′ 48″
Ch: MSA:485, U2:444, SA:24
Ref: SIMBAD, Corwin (2004)
Type: association of stars
Mag: B=?, V=?
John Herschel recorded it as "bright, irregularly round; 2'; has a 10th mag star in centre." The next observation reads: "very bright; very suddenly much brighter in the middle to a 10th mag star which is double or triple. Other clusters and nebulae in field." His third observation saw it as "a star in the centre of a bright, large, round nebula." The next observation also saw it as "a star 10th mag involved in faint nebulosity 2' diameter." The final observation recorded it as "pretty bright, pretty large, with one conspicuous star."
According to Henize, it measures 3.2' east-west and 2.6' north-south. It has a slightly irregular outline, is slightly elongated and shows appreciable structure. The 11.1 mag B-type star HD 268743 is the exciting star.
Hinks, A. R. (1911) On the galactic distribution of gaseous nebulae and of star clusters. MNRAS, 71(8), 693-701.
IC 2116 (Harvard List 88) = NGC 1769 B, L, iR, vsm bM.
[Harvard list = Stewart, D. (1908) Nebulae discovered at the Harvard College Observatory. Annals of Harvard College Observatory, 60(6), 147-194.]
"cluster, a few stars apparently involved in nebulosity; LMC."
Bailey, S.I. (1908) A catalogue of bright stars and nebulae. Ann.Harv.Coll.Obs., 60(8), 199.
The RNGC (Sulentic and Tifft 1973) notes that this is a cluster+nebulosity in the LMC.
15cm - consp circ neb @ 80x w/strong UHC and wk [OIII] enhancement. 3' diam,
reaching to m13 * SW. m11.5 cen * plus a few others much fntr in arc
running SE-NW across center. f pair 2' S. BS, 11Nov1993, LCO.
The Messier objects
The Bennett objects
The Caldwell list
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