sponsored by psychohistorian.org
RA: 11h 28m 16s
Dec: −62° 59′ 0″
Ch: MSA:990, U2:450, SA:25
Ref: SIMBAD, Corwin (2004)
Type: bright nebula
Mag: B=9.8, V=9.57
Select a photo and click the button to view
IC 2872 is the brightest part of a large (18 arcmin by 16 arcmin) diffuse nebula. The IC object itself has two or three bright lobes, perhaps defined (as in the Trifid Nebula) by dust lanes. The positions I give in the table are eyeball means for the two and three brightest lobes, while that that Andris measured for ESO-B is probably for just one of the lobes. Frost's description "bM, neb. ext. 2' in R.A. and 5'.0 in Dec" matches the two western lobes almost perfectly. His position (given only a tenth of a minute of time and an arcminute in Dec) is a little east of that, but still within his usual error.
Most of the fainter part of the nebula extends on to the northeast from the IC object itself.
This nebula was discovered photographically by R.H. Frost on plates taken with the 24-inch Bruce refractor at the Arequipa station of Harvard Observatory. It is described in the NGC as "very large, much elongated, brighter in the middle."
Ced 115 (IC 2872)
Position (1900): RA 11 23.9, Dec - 62 26
Spectrum of nebula: (not classified)
Classification: Nebulae without definite relation to certain stars - Detached nebula with discernible structure (eg. NGC 6992)
Notes: "IC 2872. Disc. Frost 1908 (852). R. Not identified."
A Preliminary Survey of Nebulosities and Associated B-Stars in Carina.
Burnham calls is a pretty large, faint nebulosity, 2' x 2' and brighter in the middle.
Gum, C.S. (1955) A survey of southern HII regions. Mem.RAS, 67. [1955MmRAS..67..155G]
A Survey of Southern H II Regions published in the RAS Memoirs, Vol. LXVII, lists this object as Gum 40. He gives the size as 12' x 4' and the intensity, or "visibility in the particular section of the Milky Way in which the object occurs" is rated as "faint" on a scale of vf - f - mb - b - vb. He notes that it may be associated with the 9.3 mag B8 star HD 99898, and adds that it corresponds to No. 115 in Sven Cederblad's 1946 catalogue. In his Notes to the catalogue he says: "This fragment may be associated with Gum 39."
In the catalogue of southern emission regions by Rodgers, Campbell and Whiteoak (1960), they compare their RCW 60 with IC 2872 and both Gum 39 and Gum 40. They described a large nebula, 50' x 50', centred at 11h 26.5m 32 30' (1950.0). They note that it is an outlying part of the Lambda Centauri nebula, which contains two bright regions: one at 11h 28.8m -62 37' (2000.0) which measures 21' x 18', (most probably Gum 39) and a second at 11h 28.8m -62 58' (2000.0) which measures 15' x 10' (most likely Gum 40, IC 2872). Gum 39, according to the author, appears as "half a disk. HD 99897 [8.6 mag B5] although towards the edge of the nebula would be at the centre of the disk if it were completed. The spectrum is B5 but deserves reclassification."
by Jim Lucyk: Vehrenberg's Atlas of DS Splendors (3ed) p111.
QBS: lg, only core seen by 15cm.
15cm - vsm sm refl neb NE side of m12.5 *. sl enhanced by DS filter, worse with
others. 1' diam, pretty f. BS, 23Feb1990, LCO.
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.