NGC 2023
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| Reflection nebula | |
|---|---|
| emission nebula | |
 NGC 2023 picture created from multiple images taken with the Wide Field Camera of Hubble’s Advanced Camera for Surveys. | |
| Observation data: J2000 epoch | |
| Right ascension | 05h 41m 37.9s[1] |
| Declination | −02° 15′ 52″[1] |
| Distance | 1467.7 ly (450 pc) |
| Apparent dimensions (V) | 10′x10′[2] |
| Constellation | Orion[2] |
| Designations | NGC 2023,[2] LBN 954,[1] VDB 52, [XT95] 6, GN 05.39.1.02, RAFGL 806, [NYS99] C-23, IRAS 05391-0217, RX J0541.8-0217, [RK68] 38 |
NGC 2023 (also known as LBN 954[1]) is an emission and reflection nebula located in the constellation of Orion. It was discovered by William Herschel on 6 January 1785. Its size in the night sky is 10 x 10 arcminutes.[2] At a distance of 1467 light years (450 parsecs) from Earth, it is located close to the the Orion Nebula.[3][4]
The region emits fluorescent molecular hydrogen emission at near-infrared range.[5] It is 4 light years in diameter[4] making it one of the largest reflection nebulae ever discovered.[citation needed] It is illuminated by the B1.5 star HD 37903, the most luminous member of the stars in the Lynds 1630 molecular cloud.[4]
References
Wikimedia Commons has media related to NGC 2023.
- ^ a b c d "SIMBAD query result for NGC 2023". SIMBAD Astronomical Database. Retrieved 2 August 2016.
- ^ a b c d "NGC Objects: NGC 2000 - 2049".
- ^ "Sunset glow in Orion". NASA. 25 July 2011.
- ^ a b c "Astronomy Photo of the Day (APotD): 11/07/14 — NGC 2023". 7 November 2014.
- ^ "Near-IR Fluorescent Molecular Hydrogen Emission from NGC 2023". Publications of the Astronomical Society of Australia. 15 (2): 194–201. Bibcode:1998PASA...15..194B.
External links
- VizieR – NGC 2023
- NED – NGC 2023
- NGC 2023 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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