|This article needs additional citations for verification. (December 2007)|
|This article may need to be rewritten entirely to comply with Wikipedia's quality standards. (May 2009)|
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|
|Declination||−02° 15′ 52″|
|Distance||1467.7 ly (450 pc)|
|Apparent dimensions (V)||10′x10′|
|Designations||NGC 2023, LBN 954, VDB 52, [XT95] 6, GN 05.39.1.02, RAFGL 806, [NYS99] C-23, IRAS 05391-0217, RX J0541.8-0217, [RK68] 38|
|See also: Lists of nebulae|
The reflection nebula NGC 2023 is in the constellation Orion. It is one of the brightest sources of fluorescent molecular hydrogen, and at 4 light-years wide it is one of the largest in the sky. It is powered by the B star (B1.5) HD 37903, the most luminous member of a cluster of young stellar objects illuminating the front surface of the Lynds 1630 molecular cloud (Barnard 33) in Orion B.
NGC 2023 forms a cavity in the surface of the cloud, some 450 parsecs from Earth. It produces a bright visual reflection nebula and an ultraviolet-excited photodissociation region. It is about a third of a degree from the Horsehead Nebula and is often included (but not indicated) in images of that object.
South part of NGC 2023 by HST, 3′ view
- "SIMBAD query result for NGC 2023". SIMBAD Astronomical Database. Retrieved 25 July 2011.
- NGC 2023 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
|This nebula-related article is a stub. You can help Wikipedia by expanding it.|