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RA: 05h 35m 15s
Dec: −04° 53′ 12″
Ch: MSA:278, U2:225, SA:11
Ref: SIMBAD, DAML02
Type: open cluster
Mag: B=?, V=?
Select a photo and click the button to view
Discovered in 1786 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "The 1st and 2nd c Orionis, and the stars about them, are involved in eF unequally bright milky nebulosity."
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."
"nebula, several bright stars inv in neb.."
Bailey, S.I. (1908) A catalogue of bright stars and nebulae. Ann.Harv.Coll.Obs., 60(8), 199.
Ced 55e (NGC 1977)
Position (1900): RA 5 30.5, Dec - 4 54
Star: 4 1185 (Mp=4.37, V=4.65, SpT=B1)
Spectrum of nebula: continuous and emission spectrum (observed)
Classification: Neb associated with mainly one star (which may be multiple) - star surrounded by a neb envelope with conspicuous structure (eg. IC 5146)
Notes: "Ced 55 e = NGC 1977 = GC 1180 = H V 30. Disc. 1786. WP 67. (30, 114, 174, 197, 216, 238, 294, 366, 409 Pl 12, 481, 522, 578, 585, 599, 630 Pl 34, 692, 711, 715, 717). R. The nebula around C' (42) Orionis = -4 1185 = HD 37018 = Boss 6934. 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."
(Sulentic and Tifft 1973) notes that this is a cluster associated with nebulosity.
Bernes, C. (1977) A catalogue of bright nebulosities in opaque dust clouds.
Bernes 114 = NGC 1973 / NGC 1975 / NGC 1977
Olszewski, E.W., Harris, H.C., Schommer, R.A. & Canterna, R.W. (1988) A catalog of LMC star clusters outside the Hode-Wright Atlas. Astron. J., 95(1), 84.
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.
:"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."
Coe (Glendale, Arizona, USA) observing with a 17.5-inch f/4.5, writes in The Webb Society Nebulae and Clusters Section Report No. 10, July 1992: "A bright and large nebulosity that has several stars involved at x100. The fainter parts of the nebulosity extend to the edges of a 30' field of view."
Coe, using a 13" f/5.6, notes: " Bright, large nebulosity that has several stars involved at 100X in the 17.5". The fainter parts of the nebulosity extend to the edges of a 30' field of view."
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: "Largest and brightest of the three [NGC 1973, 1975 & NGC 1977]. About 5' x 1.5' for the brightest part, which has V539 Ori in it. (12.5-inch, x76, Seeing A I-II)"
& Lund 1159
05 35.5 -04 52
13: see description for N1973. This is the portion involving 42 Orinios. Several stars are involved. Bright, very large, elongated. N1973 and N1975 are close W.
Instrument:12-inch Dobsonian Reflector Telescope.
Eyepieces:26mm Super Wide Field Eyepiece.
20mm Ultra Wide Angle Eyepiece.
Sky Conditions:The fainter parts of the Milky Way are barely visible.
Transparency of the Sky:Haziness only visible on the horizon.
Seeing:Atmosphere stable with little interference.
1.2.First Impression:This object looks like a small open cluster.
1.5.Chart Number:No.211(Extract taken out of "Spacewatching").
1.6.Size:26mm Eyepiece:Field Of View:57'/7=8.1'.
20mm Eyepiece:Field Of View:50'/6=8.3'.
Size In Arc Minutes:8.2'.
1.8.Brightness Profile:Towards the far and central outskirts of this cluster it is evenly bright.
1.9.Challenge Rating:Stunning Sight.
Around the bright stars in this open cluster I have
found some nebulosity.
Location: Bonnievale SSP (Night Sky Caravan Park)
Telescope: Skywatcher 200-mm f/5, Delos 8-mm (0.57-deg fov)
Binoculars: Canon 12x36 IS (5-deg fov)
Sky conditions: Good (8/10)
Quality of observation: Good
NGC 1977. Open cluster; 4 prominent binocular stars; m = 4; size about 20-arcmin.
The Messier objects
The Bennett objects
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