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NGC 1980 (3,758 of 18,816)


oc gc pln bn dn gx gxcl ast aka lost




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NGC 1980

NGC 1980, Ced 55f, Cl Collinder 72, C 0532-059, LBN 977, Ocl 529.0, COCD 76, V 31, h 361, GC 1183

RA: 05h 35m 24s
Dec: −05° 55′ 0″

Con: Orion
Ch: MSA:278, U2:270, SA:11

Ref: SIMBAD, Collinder (1931), DAML02, Archinal&Hynes (2003)

(reference key)

Type: open cluster, 33mn

Mag: B=?, V=2.5

Size: 20′
PA: ?

Historical observations

William Herschel (c.1784)

Synonyms:H V-031

Discovered in 1786 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "Iota Orionis with its neighbouring stars are involved in eF milky nebulosity to a great extent."

Published comments

Pickering, E.C. (1890)

Detection of new nebulae by photography. Annals Harv Coll Obs., 18, 113. Bibcode: [1890AnHar..18..113P]

Photographs taken with the Bache telescope, a photographic 8-inch f/5.5 doublet, covering 10 degrees square, were examined by Mrs M Fleming with a magnifying glass.

Table 1: List of nebulae (p115)

No. 11 "A nebulous band extends south preceding from DM -6 1234 for about 6'. Plate 2325 shows that the whole of this region is included in No. 12 [NGC 1976, M42]. Dreyer 1980 is near, and perhaps refers to this object."

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

Ced 55f (NGC 1980)

Position (1900): RA 5 30.5, Dec - 5 58

Star: Cl (Mp=3.0, , SpT=O8, B)

Spectrum of nebula: emission spectrum (inferred from sp.t. of exciting star)

Classification: Nebulous cluster (milky neb cover the clusters, eg NGC 1976)

Size: 14'x14'

Notes: "Ced 55 f = NGC 1980 = GC 1183 = h 361 = H V 31. Disc. 1786. WP 67. (30, 114, 174, 194, 304, 558, 578, 630 Pl 34, 631.). R. This is the nebula around {iot} Orionis = -6 1241 = HD 37043 = Boss 6937. Ced 55: The Orion region. History and bibliography: (118, 119, 186, 188, 191, 276, 352). The nebulous groundwork and the exterior nebulosities: (20, 21, 26, 53, 58, 78, 142, 143, 186, 191, 206, 207, 278, 279, 281, 282, 289, 305, 312, 438, 480, 519, 540. 541, 593, 594, 595, 620, 625, 628, 630 Pl 34, 663, 675, 715, 726 No 41, 769, 782, 802, 818). R. It is shown on several photographs, e.g. (630) Pl 34, that the whole region of the constellation Orion is filled up by vast masses of nebulosity. As is well known, there are several condensation which seem to stand out from the general background, and which have been separately discovered and studied. Such subnebulae, will be individually discussed below. Taken as a whole, No 55 of the catalogue should be classified as C. 2 in addition to the separate classes of the subnebulae."

Lynds, B.T. (1962)

Lynds, B.T. (1962) Catalogue of dark nebulae. Astrophys.J.Suppl.Ser. 7, 1-52. [also: computer datafile: VII/7A]

Sulentic & Tifft (1973)

(Sulentic and Tifft 1973) notes that this is a 2.5 mag cluster associated with nebulosity.

Bailey, S.I. (1908)

"neb; 2 bright and several faint * in neb."

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

Modern observations

Forbes, Le (1993)

Forbes (Stoke, St. Mary Bourne, Hampshire) observing from Siding Spring, Australia, writes in The Webb Society Nebulae and Clusters Section Report No. 11, January 1993: "Surrounds Iota Orionis. Most of the nebulosity is to the east of the star, with a bright patch to the north-west. Comma-shaped. (12.5-inch, x76, Seeing A I-II)"

Ancient City Astron.Club (1980)

described as "31' south of M42, 14'x14'. Visibility of the nebulosity surrounding bright field stars will be enhanced by using averted anmd by sweeping slowly across the field. A hint of nebulosity is evident using this technique, surrounding iota Ori. Field stars are a brilliant colour of blue-white. Magnitude hard to estimate. 8-inch, 48x."

Tom Lorenzin

Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "Iota ORI, mag 3.0, 11.5" separation @ PA 141; 3-7M; 0.5 degree S of the "Trapezium" ( Theta ORI); blue-white/yellow; faint nebulosity surrounding Iota ORI is N1980 (H31-5); 10' to ESE is tight, unequal DBL ST, Struve-754 (5" separation @ PA 287; 5.7-8.9M); worth looking for."

Steve Coe

Steve Coe, using a 13" f/5.6, notes: " Faint, large, irregular, not brighter in the middle at 100X. This nebula surrounds Iota ORI, the end star on the sword of Orion. If you are like me, the first time you looked at NGC 1980, you didn't know that you were looking at an object that has a seperate designation from the Great Orion Nebula."

Steve Gottlieb

OCL-529 & Lund 189

05 35.4 -05 54

13: very faint, large nebulosity of low surface brightness surrounding Iota Orionis (V = 2.8). Very difficult to distinguish from glare of Iota. M42 lies 30' N.

Favourite lists

Lacaille's catalogue

The Messier objects

Dunlop's catalogue

The Bennett objects

The Caldwell list

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