NGC 2023
Template:Short description Template:Infobox nebula
NGC 2023 is an emission and reflection nebula in the equatorial constellation of Orion. It was discovered by the German-born astronomer William Herschel on 6 January 1785. This reflection nebula is one of the largest in the sky,[1] with a size of 10 × 10 arcminutes.[2] It is located at a distance of Template:Convert from the Sun, and is positioned Template:Val to the northeast of the Horsehead Nebula.[3]
This star-forming nebula forms part of the Orion B molecular cloud,[3] or Lynds 1630, and is located in the northern section of this complex. In terms of stellar density, it is the poorest of the four clusters embedded in the cloud complex, with only 21 embedded infrared sources.[4] The reflection nebula is illuminated by the Herbig Ae/Be star HD 37903, which has a spectral class of about B2 Ve.[4] The region around the central star is radiating fluorescent molecular hydrogen emission at a near-infrared range.[5][6] Infrared emission of polycyclic aromatic hydrocarbons has been detected from the nebula's dust.[7]
Gallery
-
NGC 2023 taken with the VLT's FORS.
References
Template:Sister project Template:Reflist
External links
- Script error: No such module "citation/CS1".
- VizieR – NGC 2023
- NED – NGC 2023Template:WikiSky
Template:Catalogs Template:NGC objects:2000-2499 Template:Sky
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedscinews2019 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedngc - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedLópez-García2013 - ↑ a b Cite error: Invalid
<ref>tag; no text was provided for refs namedMookerjea2009 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs named1998Burton - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedRouan1997 - ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedPeeters2017