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NGC 1975 (3,755 of 18,816)

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NGC 1975

NGC 1975, Ced 55c, Sh 2-279, GC 5353

RA: 05h 35m 18.3s
Dec: −04° 41′ 4″

Con: Orion
Ch: MSA:278, U2:225, SA:11

Ref: NGC/IC

(reference key)

Type: bright nebula

Mag: B=7, V=?

Size: 10′ x 5′
PA: ?

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Photos  (1)

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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. 10 "Nebulosity surrounding c Orionis. Dreyer 1973, 1975 and 1977 are portions of this nebulosity where the condensation of light is sufficient to be visible to the eye. The photograph gives it an extension of 2m.0 in right ascension and 2.5' in declination. As it is connected on the following side by nebulosity with the Great Nebula of Orion, true limits cannot be given in this direction. The photographs of this nebula are nearly equal to the best drawings yet made of the Great Nebula of Orion, both in extent and in the amount of detail shown."

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

Ced 55c (NGC 1975)

Position (1900): RA 5 30.3, Dec - 4 45

Star: Anon (,

Spectrum of nebula: (not classified)

Classification: Neb associated with mainly one star (which may be multiple) - star surrounded by a neb envelope without conspicuous structure (eg. lambda Scorpii)

Size: (not given)

Notes: "Ced 55 c = NGC 1975 = GC 5353. Disc. d'Arrest. R. According to (114) this is a double nebulous star within the boundary of the Great Orion Nebula. 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."

Bernes, C. (1977)

Bernes, C. (1977) A catalogue of bright nebulosities in opaque dust clouds.

Bernes 114 = NGC 1973 / NGC 1975 / NGC 1977

Sulentic & Tifft (1973)

(Sulentic and Tifft 1973) notes that this is a diffuse nebula.

Photo index

by Jim Lucyk: Sky&Tel. 5/81 p463, Deep Sky #5 Wi83 p12, Deep Sky #6 Sp84 p32, Burnhams V2 p1336, Vehrenberg's Atlas of Galactic Neb-1 p68.

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: "The faintest of the three [NGC 1973, 1975 & NGC 1977] having uniform surface brightness, except for one strip to the north-east. (12.5-inch, x76, Seeing A I-II)"

Ware, Donald J

:"this is a relatively bright region of nebulosity just north of the M- 42 complex. It is large, about 15'x10 and surrounds several relatively bright stars. It would be observed more often if it weren't located so close to M-42, and greatly deserves more attention."

Steve Gottlieb

05 35.4 -04 41

13: see description for N1973. This is the faintest portion and appears

large and elongated, including a mag 12/12 double star.

Contemporary observations

Richard Ford

2012 March 24th, Sat

Location:Perdeberg.

Time:8:05pm.

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.

A small portion of this nebula is seen because the diffuse light of this nebula is part of the NGC 1977 and NGC 1973 complex.The stars in this nebula shine because they reflect the light within it.This nebula however looks like a soft bluish glow of faint light.This nebula measures 9.2'*3'.This nebula grows brighter in the center compared to the stars on the far outskirts of this nebula.

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