NGC 2023
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Lua error in Module:Infobox at line 235: malformed pattern (missing ']'). NGC 2023 (also known as LBN 954) is a reflection nebula located in the constellation of Orion (The Hunter).[2]
Regarding infrared wavelengths, it is a heavy source of fluorescent molecular hydrogen emission,[3] and at 4 light-years wide, it is one of the largest reflection nebulae in the sky. It is powered by an extremely hot B-type star (B1.5), called HD 37903, the most luminous member of a cluster of young Herbig–Haro objects that illuminate the outermost material in 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 [4] and is often included (but not labeled) in images of that object.
Additionally, one of the defining features of NGC 2023 — the overtly bright streak often seen in the upper-left hand corner — is not a true feature. Instead, the flare is an artifact generated by Hubble’s optics.[5]
Gallery
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NGC 2023 Hubble WikiSky.jpg
South part of NGC 2023 by HST, 3′ view
References
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<references />, or <references group="..." />External links
- NGC 2023 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Coordinates: 
05h 41m 37.9s, −02° 15′ 52″
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ http://adsabs.harvard.edu/full/1998PASA...15..194B
- ↑ http://www.fromquarkstoquasars.com/apotd-ngc-2023/
- ↑ http://www.spacetelescope.org/images/potw1130a/
