Sh 2-312

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Sharpless 2-312
Nebula
Pyxis (Cropped to focus on Sh 2-312 Nebula).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
DesignationsLBN 1077
See also: Lists of nebulae

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

  1. ↑ "SIMBAD query result".
  2. ↑ "Sharpless (Sh2) - Astrobasics". 13 September 2022.
  3. ↑ Chanot, A.; Sivan, J. P. (1983). "The GUM nebula : New photometric and spectrophotometric results". Astronomy and Astrophysics. 121: 19. Bibcode:1983A&A...121...19C.
  4. ↑ "Sh 2-312".
  5. ↑ Blitz, L.; Fich, M.; Stark, A. A. (1982). "Catalogue of CO radial velocities toward galactic HII regions". The Astrophysical Journal Supplement Series. 49: 183. Bibcode:1982ApJS...49..183B. doi:10.1086/190795.
  6. ↑ "CCD Images of the Sharpless Catalog".
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