NGC 206

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NGC 206
NGC206.jpg
Observation data (J2000 epoch)
Right ascension 00h 40m 31.3s[1]
Declination +40° 44′ 21″[1]
Apparent dimensions (V) 4.2′
Physical characteristics
Radius unknown
See also: Open cluster, List of open clusters

NGC 206 is a bright star cloud in the Andromeda Galaxy. It is notable for being the brightest star cloud in Andromeda as viewed from Earth.

Features[edit]

NGC 206 is the richest and most conspicuous star cloud in the Andromeda Galaxy as well as one of the largest and brightest star formation regions of the Local Group.[2] It contains more than 300 stars brighter than Mb=-3.6.[3] It was originally identified by Edwin Hubble as a star cluster but today, due to its size, it is classified as an OB association.[4]

NGC 206 is located in a spiral arm of the Andromeda Galaxy, in a zone free of neutral hydrogen and has a double structure, with one region that has an age of around 10 million years and includes several H II regions in one of its borders and other with an age of between 40 million years and 50 million years that includes a number of cepheids. Both parts are separated by a band of interstellar dust and include hundreds of stars of spectral type O and B.[5]

External links[edit]

References[edit]

  1. ^ a b "NASA/IPAC Extragalactic Database". Results for NGC 514. Retrieved 2006-11-25. 
  2. ^ Massey, Philip; Armandroff, Taft E.; Pyke, Randall; Patel, Kanan; Wilson, Christine D. (1995). "Hot, Luminous Stars in Selected Regions of NGC 6822, M31, and M33.". Astronomical Journal 110: 2715. Bibcode:1995AJ....110.2715M. doi:10.1086/117725. 
  3. ^ Hodge, Paul W. (1992). The Andromeda Galaxy. Springer. p. 153. 
  4. ^ Hodge, Paul W. (1992). The Andromeda Galaxy. Springer. p. 20. Retrieved 9 February 2012. 
  5. ^ Chernin, Arthur D.; Efremov, Yury N.; Voinovich, Peter A. (1995). "Superassociations: violent star formation induced by shock-shock collisions.". Monthly Notices of the Royal Astronomical Society 275 (2): 313–326. Bibcode:1995MNRAS.275..313C. 

Coordinates: Sky map 00h 40m 31.3s, +40° 44′ 21″