Messier 42

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Orion Nebula
Diffuse nebula

Messier 42 ê khó-kiàn-kng siòng-phìⁿ. The entire Orion Nebula in a composite image of visible light and infrared; taken by Hubble Space Telescope in 2006
Observation data: J2000 epoch
Subtype Reflection/Emission[2]
Right ascension 05h 35m 17.3s[1]
Declination −05° 23′ 28″[1]
Distance 1,344±20 ly   (412[3] pc)
Apparent magnitude (V) 4.0[4]
Apparent dimensions (V) 65×60 arcmins[5]
Constellation Orion
Physical characteristics
Radius 12[a] ly
Absolute magnitude (V)
Notable features Trapezium cluster
Designations NGC 1976, M42,
LBN 974, Sharpless 281
See also: Lists of nebulae

Messier 42 (M42, NGC 1976) sī chi̍t-ê chhiⁿ-hûn, ia̍h hō-chòe La̍h-hō͘-chō tōa-chhiⁿ-hûn, tī thiⁿ-kiû ê ūi-tì tī La̍h-hō͘-chō (Orion), chham tē-kiû ê kū-lî ū 1,270±76 kng-nî.

Tsù-kái[siu-kái | kái goân-sí-bé]

  1. 1.0 1.1 "NGC 7538". SIMBAD. Centre de données astronomiques de Strasbourg. October 20, 2006 khòaⁿ--ê. 
  2. Gater, Will; Vamplew, Anton (2010). The Practical Astronomer (1st American pán.). London: DK Pub. p. 242. ISBN 978-0-7566-7324-6. 
  3. Reid, M. J.; et al. (2009). "Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions". Astrophysical Journal. 700 (1): 137–148. arXiv:0902.3913Freely accessible. Bibcode:2009ApJ...700..137R. doi:10.1088/0004-637X/700/1/137. 
  4. "NGC 1976 = M42". SEDS.org. December 13, 2009 khòaⁿ--ê. 
  5. Revised NGC Data for NGC 1976 per Wolfgang Steinicke's Revised New General Catalogue and Index Catalogue.

Guā-pōo lên-ket[siu-kái | kái goân-sí-bé]

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