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NGC 1866 (3,468 of 18,816)


oc gc pln bn dn gx gxcl ast aka lost




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NGC 1866

NGC 1866, LW 163, SL 319, ESO 85-52, Bennett 33, h 2793, GC 1076

RA: 05h 13m 38.9s
Dec: −65° 27′ 52″

Con: Dorado
Ch: MSA:485, U2:444, SA:24


(reference key)

Type: globular cluster

Mag: B=9.98, V=9.73

Size: ?
PA: ?

Image gallery

Sketches  (1)

Select a sketch and click the button to view

Historical observations

John Herschel

John Herschel recorded it as "vB, L, R, vgmbM, 2', resolvable."

Published comments

Bailey, S.I. (1908)

"! globular cluster, extremely condensed, partially resolved; LMC."

Bailey, S.I. (1908) A catalogue of bright stars and nebulae. Ann.Harv.Coll.Obs., 60(8), 199.

Shapley & Wilson (1925)

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."

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 10.0 mag open cluster in the LMC.

Van den Bergh & Hagen (1968)

Van den Bergh and Hagen ("UBV photometry of star clusters in the Magellanic Clouds", Astronomical Journal, Vol. 73, 1968) find that the integrated V magnitude through a 60'' diaphragm is 9.89. They remark that through a 42'' diaphragm V = 10.26. They classify it as an open cluster.

Shapley & Lindsay (1963)

Shapley and Lindsay ("A Catalogue of Clusters in the Large Magellanic Cloud", Irish Astronomical Journal, Vol. 6, 1963) give a diameter of 5.1' and remark "very condensed centre, outer well resolved."

Shapley & Wilson (1925)

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.

Photo index

Photo Index by Jim Lucyk: Sky&Tel. 2/61 p72, Sky&Tel. 7/69 p25, Sky&Tel. 9/70 p135.

Modern observations

ASV Journal (1971)

ASV Journal Vol 24 No 3 June 1971: "easy in 4-inch 64x."

Brian Skiff

15cm - br grainy cl @ 80x. 195x: just barely res, 2'.25 diam w/strong

even-broad concen. BS, 11Nov1993, LCO.

Contemporary observations

Magda Streicher

(no date)

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)

Small and densely packed, round blob of light. Displays a barely brighter middle, with a few faint stars on the outskirts (218x). It seems that the northeast side has a few extensions of faint stars (218x). Very bare star field. Discovered by Sir John Herschel.

1997 July 04

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

NGC 1866 mag 9 size 5.

Small to medium, condensed packed, round plop of light. Little brighter to the middle with no stars visible. Bare starfield.

Richard Ford

2013 April, 13th Saturday



Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.Atmosphere stable with little interference.

Instrument:12-inch Dobsonian.

This open cluster is well detached as a large cluster with a bright central core which looks like an out of focus halo of pale white light.This open clusters stars are not at all concentrated and that this clusters stars are nearly as bright as each other.This cluster is well composed of 12th to 13th magnitude stars.This open cluster measures 14.2'x 10.9'.

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