NGC 1931

NGC 1931
Emission nebula
reflection nebula
	NGC 1931
Observation data: J2000.0 epoch
Right ascension	5h 31m
Declination	+34° 15′
Distance	~7000 ly
Apparent magnitude (V)	10.1
Apparent dimensions (V)	3′
Constellation	Auriga
	See also: Lists of nebulae

NGC 1931 is an emission and reflection nebula in the constellation Auriga. The nebula has been referred to as a "miniature version of the Orion Nebula", as it shares some of the same characteristics. It is a mixed emission-reflection nebula, and contains a smaller version of the Trapezium in its hot young star cluster centered in the emission nebula. The entire cluster/nebula complex is only about 3 arcmin^[2] in size. The distance from earth is estimated at 7000 light years.^[3]

The nebula is Sharpless catalog Sh 2-237.

References

^ ^a ^b ^c "NGC 1931". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2008-11-16.
^ NGC 1931 @ SEDS NGC objects pages Archived 2008-05-01 at the Wayback Machine
^ A.K. Pandey; H.S. Mahra (1986). "Photometry of Open Cluster NGC 1931". Astrophysics and Space Science. 120 (1): 107–113. Bibcode:1986Ap&SS.120..107P. doi:10.1007/BF00653902. S2CID 123187383.

External links

NGC 1931 @ Wikisky
NGC 1931 @ SEDS NGC objects pages
Sharpless 237 Archived 2011-09-30 at the Wayback Machine

[simbad-1] "NGC 1931". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2008-11-16.

[2] NGC 1931 @ SEDS NGC objects pages Archived 2008-05-01 at the Wayback Machine

[pandeymahra1986-3] A.K. Pandey; H.S. Mahra (1986). "Photometry of Open Cluster NGC 1931". Astrophysics and Space Science. 120 (1): 107–113. Bibcode:1986Ap&SS.120..107P. doi:10.1007/BF00653902. S2CID 123187383.

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