Astronomy:Sh 2-312
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| Emission nebula | |
|---|---|
| H II region | |
.png) Sh 2-312 seen very faintly, Gamma Pyxidis in lower-right corner | |
| Observation data: J2000 epoch | |
| Right ascension | 08h 59m 12s |
| Declination | −25° 41′ 00″[1] |
| Apparent magnitude (V) | 17.82 |
| Apparent dimensions (V) | 12° x 3° |
| Constellation | Pyxis |
| Designations | LBN 1077 |
Sh 2-312 is a nebula in the southern constellation of Pyxis. It is very large and diffuse, making it largely ignored and unstudied outside of its relation to the Gum Nebula. Sh 2-312 is located approximately 56 parsecs away from RCW 22,[2] another nebula postulated to be a part of the larger Gum Nebula[3], which is itself estimated to be approximately 300 parsecs in width based on angular diameter approximation. [4][5] It responds well to Hydrogen-alpha filters; however, it requires extended exposure time to become visible during observation.[6]
References
- ↑ "SIMBAD query result". https://simbad.u-strasbg.fr/simbad/sim-id?Ident=Sh%202-312&NbIdent=1&Radius=10&Radius.unit=arcmin&CooFrame=FK5&CooEpoch=2000&CooEqui=2000&output.max=all&o.catall=on&output.mesdisp=N&Bibyear1=1983&Bibyear2=2005&Frame1=FK5&Frame2=FK4&Frame3=G&Equi1=2000.0&Equi2=1950.0&Equi3=2000.0&Epoch1=2000.0&Epoch2=1950.0&Epoch3=2000.0.
- ↑ "Sharpless (Sh2) - Astrobasics". 13 September 2022. https://astrobasics.de/galerie/kataloge/sh2/#object-10678.
- ↑ Chanot, A.; Sivan, J. P. (1983). "The GUM nebula : New photometric and spectrophotometric results". Astronomy and Astrophysics 121: 19. Bibcode: 1983A&A...121...19C. https://ui.adsabs.harvard.edu/abs/1983A%26A...121...19C/abstract.
- ↑ "Sh 2-312". http://galaxymap.org/cat/view/sharpless/312.
- ↑ Blitz, L.; Fich, M.; Stark, A. A. (1982). "Catalogue of CO radial velocities toward galactic HII regions". The Astrophysical Journal Supplement Series 49: 183. doi:10.1086/190795. Bibcode: 1982ApJS...49..183B. https://ui.adsabs.harvard.edu/abs/1982ApJS...49..183B/abstract.
- ↑ "CCD Images of the Sharpless Catalog". http://www.sharplesscatalog.com/sharpless.aspx.
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