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Type: open cluster
Mag: B=13.14, V=12.87
Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "an irregular train of stars and nebulosity in the Nubecula Minor." He notes that it may be equivalent to Dunlop 2.
Dunlop, J. (1828) A Catalogue of Nebulae and Clusters of Stars in the Southern Hemisphere, Observed at Paramatta in New South Wales. Phil. Trans. Roy. Soc., 118, 113-151. [1828RSPT..118..113D]
Dunlop 2 was discovered by James Dunlop from Paramatta, New South Wales, and included in his catalogue of 1827. Using a 9-inch f/12 telescope, he described it as "a faint nebula, about 1.5' long, irregular figure, rather branched. This is involved in the margin of the Nebula minor."
Kron, G. E. (1956) Star Clusters in the Small Magellanic Cloud: I. Identification of 69 Clusters. PASP, Vol. 68. [1956PASP...68..125K]
Describes it as a blue cluster, noting the presence of bright blue giant stars. He notes that it is concentrated towards the centre, has a star nearby and exhibits emission nebulosity. Lindsay ("Clusters in the Small Magellanic Cloud", Irish Astronomical Journal, Vol. 4, 1956) classifies it as an open cluster.
The RNGC (Sulentic and Tifft 1973) notes that this is a 12.0 mag open cluster in the SMC.
15cm - lgr dispersed cl w/o concen NE of N220/22 pair. 2' diam w/15 *s m14+
@ 140x. BS, 9Nov1993, LCO.
11x80: 1997-10-09, 02:30, Jonkershoek, seeing 3, transparency 3, darkness 3 "Not found."
The Messier objects
The Bennett objects
The Caldwell list
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