sponsored by psychohistorian.org
Type: globular cluster
Mag: B=10.9, V=10.93
Select a sketch and click the button to view
John Herschel recorded it as "pB, L, R, gbM, 2'." On a second occasion he called it "B, L, R, vgpmbM, resolvable 3'."
Harvard Circular 271, "The Magellanic Clouds, IV."
(p.5) "The positions and angular diameters are given in Harvard Bulletin 775 for seven clusters in the Large Magellanic Cloud. Their apparent magnitudes measured on a special small scale photograph, Bo 907, are as follows:"
NGC 1651, 12.0 mp
NGC 1783, 8.0 mp
NGC 1806, 10.4 mp
NGC 1831, 8.3 mp
NGC 1846, 8.9 mp
NGC 1866, 7.2 mp
NGC 1978, 10.3 mp
"The first and sixth objects in the list are not certainly globular clusters; the dispresion on the best Harvard photographs with the Bruce telescope is hardly sufficient to decide that the first is not a nebula and that the sixth is not a nebulous open cluster. For the other five, which appear to be typical globular clusters, the mean apparent photographic magnitude is 9.2, corresponding to the absolute photographic magnitude -8.5."
("A Catalogue of Clusters in the Large Magellanic Cloud", Irish Astronomical Journal, Vol. 6, 1963) give a diameter of 5.7' x 2.8' and remark "very elongated globular."
Harvard College Obs. Circ., No 271. "The Magellanic Clouds, IV. The Absolute Magnitudes of Nebulae, Clusters, and Peculiar Stars in the Large Cloud."
Mentioned. Also gives integrated apparent magnitude.
"UBV photometry of star clusters in the Magellanic Clouds" (1968, AJ, 73) find that the integrated V magnitude through a 60'' diaphragm is 10.97. Though a 42'' diaphragm V = 11.72. They classify it as a globular cluster. They find it is an old cluster with B-V = 2.4.
Globular clusters in galaxies. Ann.Rev.Astron.Astrophys., 17, 241-274.
p255: "... three clusters (NGC 419, 1783 and 1846) - sometimes considered globular (van den Bergh 1968) but rejected here on the basis of their integrated colors - possess extremely red stars at the tip of the giant branch (Feast & Lloyd-Evans 1973)."
by Jim Lucyk: Sky&Tel. 2/61 p74.
(Sulentic and Tifft 1973) notes that this is a 11.0 mag globular cluster in the LMC.
"nebula, 1 star involved, round, brighter at middle; LMC."
Bailey, S.I. (1908) A catalogue of bright stars and nebulae. Ann.Harv.Coll.Obs., 60(8), 199.
ASV Journal, Vol 24, No 3, June 1971: "easy in 4-inch 64x."
p.e. seq in Alvarado et al. 1995, AJ 110,646. m15 * prob V=14.6 at SE edge.
15cm - br sl oval cl @ 80x, elong E-W. 195x: many exf *s at threshold pop in & out. mod even concen in modhisfcbr glow. m15 * consp nr SW edge. BS, 11Nov1993, LCO.
Location: Pietersburg South 23o 53. East 29o 28.
Sky conditions: Clear.
Date: 4 Julie 1997.
Field of view: 52.7 arc minutes.
ASSA-DSO - Report J
Small, round, faint frosted light evenly spread out. Very low in suffuse brightness. No sharp edges, and no ouliers. Small bright stars surround this globular.
12-inch f/10 SCT (EP: 2-inch 40mm SW 76x 53' fov; 2-inch 32mm SW 95x 42' fov; 2-inch 14mm UW 218x 23' fov)
Outstanding and slightly oblong in a north south direction. Has all the parameters, density to a compact centre with stars resolved over the surface and more so on the softer outer edges. A few references classify it as an open cluster.
Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.Atmosphere stable with little interference.
This tiny globular cluster which looks like a minute snowflake stars are just partially resolved as a misty halo of white light.In this globular cluster the central nucleus grows brighter compared to the far outskirts of this cluster and that this globular cluster has a slightly circular shape.In this globular cluster the stars are spherically concentrated towards each other in a bright halo.This globular cluster measures 3.1'x 2.5'.
The Messier objects
The Bennett objects
The Caldwell list
DOCdb is still in beta-release.
Known issues, feature requests, and updates on bug fixes, are here:
Found a bug? Have a comment or suggestion to improve DOCdb? Please let us know!
DOCdb is a free online resource that exists to promote deep sky observing.
You could help by sharing your observations, writing an article, digitizing and proof-reading historical material, and more.
Everything on DOCdb.net is © 2004-2010 by Auke Slotegraaf, unless stated otherwise or if you can prove you have divine permission to use it. Before using material published here, please consult the Creative Commons Attribution-Non-Commercial-Share Alike 2.5 License. Some material on DOCdb is copyright the individual authors. If in doubt, don't reproduce. And that goes for having children, too. Please note that the recommended browser for DOCdb is Firefox 3.x. You may also get good results with K-Meleon. Good luck if you're using IE. A successful experience with other browsers, including Opera and Safari, may vary.