NGC 206: Difference between revisions

NGC 206
NGC 206
	NGC 206
Observation data (J2000 epoch)
Right ascension	00h 40m 31.3s
Declination	+40° 44′ 21″
Apparent dimensions (V)	4.2′ (arcmin)
Physical characteristics
Radius	Ca. 400 ly
Associations
Constellation	Andromeda
	See also: Open cluster, List of open clusters

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NGC 206 is a bright star cloud in the Andromeda Galaxy, and the brightest star cloud in Andromeda when viewed from Earth.

Features

NGC 206 is the richest and most conspicuous star cloud in the Andromeda Galaxy, and is one of the largest and brightest star-forming regions in the Local Group.^[2] It contains more than 300 stars brighter than M_b=−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. It contains hundreds of stars of spectral types O and B. The star cloud has a double structure: one region has an age of around 10 million years and includes several H II regions in its border; the other region has an age of 40 to 50 million years and includes a number of cepheids. The two regions are separated by a band of interstellar dust.^[5]

References

^ ^a ^b "NASA/IPAC Extragalactic Database". Results for NGC 206. Retrieved 25 November 2006.
^ 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.
^ Hodge, Paul W. (1992). The Andromeda Galaxy. Springer. p. 153.
^ Hodge, Paul W. (1992). The Andromeda Galaxy. Springer Science & Business Media. p. 20. ISBN 978-0-7923-1654-1.
^ 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. doi:10.1093/mnras/275.2.313.

External links

NGC 206 @ SEDS NGC objects pages
NGC 206 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
NASA Astronomy Picture of the Day: Stars of NGC 206 (2 April 1999)

[ned-1] "NASA/IPAC Extragalactic Database". Results for NGC 206. Retrieved 25 November 2006.

[Massey1995-2] 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 Science & Business Media. p. 20. ISBN 978-0-7923-1654-1.

[Chernin1995-5] 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. doi:10.1093/mnras/275.2.313.

[1]

[2]

[3]

[4]

[5]

@@ Line 1: / Line 1: @@
+{{Short description|OB association in the Andromeda Galaxy}}
-{{Use dmy dates|date=March 2012}}
+{{Use dmy dates|date=December 2023}}
 {{Infobox cluster
 | image = [[File:NGC206.jpg|300px]]
+| caption = NGC 206
 | name = [[New General Catalogue|NGC]] 206
 | type = Star Cloud
@@ Line 7: / Line 9: @@
 | ra = {{RA|00|40|31.3}}<ref name="ned">{{cite web
   | title=NASA/IPAC Extragalactic Database
-  | work=Results for NGC 514
+  | work=Results for NGC 206
   | url=http://nedwww.ipac.caltech.edu/
-  | accessdate=2006-11-25 }}</ref>
+  | access-date=25 November 2006 }}</ref>
 | dec = {{DEC|+40|44|21}}<ref name="ned" />
 | dist_ly =
 | dist_pc =
 | appmag_v =
-| size_v = 4.2′
+| size_v = 4.2′ ([[Minute of arc|arcmin]])
 | radius_ly = Ca. 400 ly
 | absmag_v = Unknown
-| constellation name = Andromeda
+| constellation = [[Andromeda (constellation)|Andromeda]]
 | notes =
 | names =
 }}
-'''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]].
+'''NGC 206''' is a bright [[star cloud]] in the [[Andromeda Galaxy]], and the brightest star cloud in Andromeda when viewed from [[Earth]].
 ==Features==
-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]].<ref name=Massey1995>
+NGC 206 is the richest and most conspicuous star cloud in the Andromeda Galaxy, and is one of the largest and brightest star-forming regions in the [[Local Group]].<ref name=Massey1995>
 {{cite journal
 | volume = 110
@@ Line 44: / Line 46: @@
 |bibcode = 1995AJ....110.2715M
 | doi = 10.1086/117725
-}}</ref> It contains more than 300 stars brighter than M<sub>b</sub>=−3.6.<ref>{{Cite book|title=The Andromeda Galaxy|first=Paul W.|last=Hodge|authorlink=Paul W. Hodge|year=1992|publisher=[[Springer Science+Business Media|Springer]]|page=153}}</ref> It was originally identified by [[Edwin Hubble]] as a star cluster but today, due to its size, it is classified as an [[OB association]].<ref>{{Cite book |url= https://books.google.com/books?id=71FRczXVBWgC&pg=PA20#v=onepage&q&f=false |title=The Andromeda Galaxy  |first=Paul W.  |last=Hodge|page=20 |publisher=Springer|year= 1992  |accessdate=9 February 2012}}</ref>
+}}</ref> It contains more than 300 stars brighter than M<sub>b</sub>=−3.6.<ref>{{Cite book|title=The Andromeda Galaxy|first=Paul W.|last=Hodge|author-link=Paul W. Hodge|year=1992|publisher=[[Springer Science+Business Media|Springer]]|page=153}}</ref> It was originally identified by [[Edwin Hubble]] as a star cluster but today, due to its size, it is classified as an [[OB association]].<ref>{{Cite book |url= https://books.google.com/books?id=71FRczXVBWgC&pg=PA20|title=The Andromeda Galaxy  |first=Paul W.  |last=Hodge|page=20 |publisher=Springer Science & Business Media|year= 1992|isbn=978-0-7923-1654-1}}</ref>
-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 region]]s in one of its borders and other with an age of between 40 million years and 50 million years that includes a number of [[Cepheid variable|cepheids]]. Both parts are separated by a band of [[cosmic dust|interstellar dust]] and include hundreds of stars of [[Stellar classification|spectral type]] [[O-type main-sequence star|O]] and [[B-type main-sequence star|B]].<ref name=Chernin1995>
+NGC 206 is located in a [[spiral arm]] of the Andromeda Galaxy, in a zone free of [[neutral hydrogen]]. It contains hundreds of stars of [[Stellar classification|spectral types]] [[O-type main-sequence star|O]] and [[B-type main-sequence star|B]]. The star cloud has a double structure: one region has an age of around 10 million years and includes several [[H II region]]s in its border; the other region has an age of 40 to 50 million years and includes a number of [[Cepheid variable|cepheids]]. The two regions are separated by a band of [[cosmic dust|interstellar dust]].<ref name=Chernin1995>
 {{cite journal
 | volume = 275
 | issue = 2
 | pages = 313–326
 | last1 = Chernin
 | first1 = Arthur D.
 | last2 = Efremov
@@ Line 61: / Line 63: @@
 | year = 1995
 | bibcode = 1995MNRAS.275..313C
 | doi = 10.1093/mnras/275.2.313
+| doi-access = free
 }}</ref>
-{{Clear}}
 ==See also==
 {{Portal |Astronomy}}
 * [[List of Andromeda's satellite galaxies]]
-{{Clear}}
 == References ==
-{{Reflist |2}}
+{{Reflist}}
 == External links ==
+{{commonscat}}
 * [http://messier.seds.org/more/m031_n206.html NGC 206 @ SEDS NGC objects pages]
 * {{WikiSky}}
+* {{APOD |date=2 April 1999|title=Stars of NGC 206}}
 {{Sky|00|40|31.3|+|40|44|21|2500000}}
 {{Andromeda Galaxy}}
-{{Ngc5}}
+{{Ngc5}}{{Andromeda (constellation)}}
 {{DEFAULTSORT:NGC 0206}}
-[[Category:Stellar associations]]
+[[Category:Star clouds]]
 [[Category:Andromeda Galaxy]]
 [[Category:Andromeda (constellation)]]
 [[Category:NGC objects|0206]]
-{{stub}}

v t e Andromeda Galaxy
Location	Andromeda Galaxy → Andromeda subgroup → Local Group → Local Sheet → Virgo Supercluster → Laniakea Supercluster → Local Hole → Observable universe → Universe Each → may be read as "within" or "part of".	Andromeda Galaxy
Satellite galaxies	M32 M110 NGC 185 NGC 147 Andromeda I Andromeda II Andromeda III Andromeda IV* Andromeda V Andromeda VI Andromeda VII Andromeda VIII Andromeda IX Andromeda X Andromeda XI Andromeda XII Andromeda XIII Andromeda XIV Andromeda XV Andromeda XVI Andromeda XVII Andromeda XVIII Andromeda XIX Andromeda XX Andromeda XXI Andromeda XXII Andromeda XXIII Andromeda XXIV Andromeda XXV Andromeda XXVI Andromeda XXVII Andromeda XXVIII Andromeda XXIX Triangulum subgroup* *It is uncertain whether these are companion galaxies of the Andromeda Galaxy
Catalogued stars	AE Andromedae AF Andromedae M31-RV
Other	Andromeda–Milky Way collision S Andromedae Mayall II M32p NGC 206 3XMM J004232.1+411314
Category