imported>凌雲：/* 外部連結 */ 增加或調整分類

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外部連結：增加或調整分類

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{{Infobox globular cluster
| name = [[New General Catalogue|NGC]] 5286
| image = [[File:NGC 5286.jpg|250px]]
| caption = NGC 5286（中央）與半人馬M
| class = V<ref name=hcob849_11/>
| epoch = [[J2000]]
| ra = {{RA|13|46|26.81}}<ref name=aj140_6_1830/>
| dec = {{DEC|–51|22|27.3}}<ref name=aj140_6_1830/>
| dist_ly = {{Convert|35.9|kly|kpc|abbr=on|lk=on}}<ref name=aj139_2_476/>
| appmag_v = 7.6
| mass_msol = {{Val|7.13|e=5}}<ref name=apj742_1_51/>
| metal_fe = –1.41<ref name=mnras404_3_1203/>
| age = 12.54 [[Gigayear|Gyr]]<ref name=mnras404_3_1203/>
| constellation = [[半人馬座]]
| names = [[科德韋爾深空天體表|科德韋爾]] 84
}}

'''NGC 5286'''，也稱為'''科德韋爾84'''，是由[[恆星]]組成的一個[[球狀星團]]，位置在[[半人馬座]]，距離地球35,900<ref name=aj139_2_476/>[[光年]]。在這個距離，來自這個星團的光經歷了星際氣體和塵埃的[[消光|紅化]]，因此在[[UBV測光系統]]的{{nowrap|E(B – V)}}=0.24[[星等]]。在這個星團的北方4[[角分]]有一顆裸眼可見的恆星[[HD 119834|半人馬M]]（4.65等）<ref name="AAA554_A63"/>。它是蘇格蘭天文學家[[詹姆士·丹露帕]]在澳洲發現的，並且列在他於1827年編輯的星表內<ref name="OMeara2002"/>。

這個星團距離[[銀心|銀河中心]]{{Convert|8.9|kpc|kly|abbr=on|disp=flip}}，目前正在[[銀暈]]內環繞著[[銀河]]。它可能與[[麒麟座環]]，一個從[[矮星系]]形成但已經斷裂的恆星潮汐流，有所關聯。NGC 5286可能是銀河系內最古老的球狀星團<ref name="AAA554_A63"/>，估計他的年齡是125.4億歲<ref name=mnras404_3_1203/>。它不是個完美的球形，投影有著0.12的[[扁率]]<ref name="AAA554_A63"/>。

星團中心恆星的[[速度瀰散度]]是{{nowrap|(8.1 ± 1.0) [[公里/秒]]}}。根據在這個星團中心的恆星運動，它可能擁有的[[中介質量黑洞]]的質量不到星團質量的1%，而估計整個星團的質量上限是6,000[[太陽質量]] <ref name="AAA554_A63"/>。

== 參考資料 ==
{{reflist|refs=
<ref name="OMeara2002">{{Citation
| first1 = Stephen James
| last1 = O'Meara
| title = The Caldwell Objects
| publisher = Cambridge University Press
| page = 337
| year = 2002
| url = http://books.google.com/books?id=3Hg6YHgx9nAC&pg=PA337
| postscript = .
}}</ref>

<ref name="AAA554_A63">{{Citation
| last1 = Feldmeier | first1 = A.
| last2 = Lützgendorf | first2 = N.
| last3 = Neumayer | first3 = N.
| last4 = Kissler-Patig | first4 = M.
| last5 = Gebhardt | first5 = K.
| last6 = Baumgardt | first6 = H.
| last7 = Noyola | first7 = E.
| last8 = de Zeeuw | first8 = P. T.
| last9 = Jalali | first9 = B.
| display-authors = 1
| title = Indication for an intermediate-mass black hole in the globular cluster NGC 5286 from kinematics
| journal = Astronomy & Astrophysics
| volume = 554
| page = A63
|date=June 2013
| arxiv = 1304.4176
| bibcode = 2013A&A...554A..63F
| doi = 10.1051/0004-6361/201321168
| postscript = .
}}</ref>

<ref name=aj140_6_1830>{{citation | display-authors=1 | last1=Goldsbury | first1=Ryan | last2=Richer | first2=Harvey B. | last3=Anderson | first3=Jay | last4=Dotter | first4=Aaron | last5=Sarajedini | first5=Ata | last6=Woodley | first6=Kristin | title=The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters | journal=The Astronomical Journal | volume=140 | issue=6 | pages=1830–1837 |date=December 2010 | doi=10.1088/0004-6256/140/6/1830 | bibcode=2010AJ....140.1830G | postscript=. |arxiv = 1008.2755 }}</ref>

<ref name=hcob849_11>{{citation | last1=Shapley | first1=Harlow | last2=Sawyer | first2=Helen B. | title=A Classification of Globular Clusters | journal=Harvard College Observatory Bulletin | issue=849 | pages=11–14 |date=August 1927 | bibcode=1927BHarO.849...11S | postscript=. }}</ref>

<ref name=mnras404_3_1203>{{citation | last1=Forbes | first1=Duncan A. | last2=Bridges | first2=Terry | title=Accreted versus in situ Milky Way globular clusters | journal=[[Monthly Notices of the Royal Astronomical Society]] | volume=404 | issue=3 | pages=1203–1214 |date=May 2010 | doi=10.1111/j.1365-2966.2010.16373.x | bibcode=2010MNRAS.404.1203F | postscript=. |arxiv = 1001.4289 }}</ref>

<ref name=aj139_2_476>{{citation | display-authors=1 | last1=Paust | first1=Nathaniel E. Q. | last2=Reid | first2=I. Neill | last3=Piotto | first3=Giampaolo | last4=Aparicio | first4=Antonio | last5=Anderson | first5=Jay | last6=Sarajedini | first6=Ata | last7=Bedin | first7=Luigi R. | last8=Chaboyer | first8=Brian | last9=Dotter | first9=Aaron | last10=Hempel | first10=Maren | last11=Majewski | first11=Steven | last12=Marín-Franch | first12=A. | last13=Milone | first13=Antonino | last14=Rosenberg | first14=Alfred | last15=Siegel | first15=Michael | title=The ACS Survey of Galactic Globular Clusters. VIII. Effects of Environment on Globular Cluster Global Mass Functions | journal=The Astronomical Journal | volume= 139 | issue= 2 | pages= 476–491 |date=February 2010 | doi=10.1088/0004-6256/139/2/476 | bibcode=2010AJ....139..476P | postscript=. }}</ref>

<ref name=apj742_1_51>{{citation | display-authors=1 | last1=Boyles | first1=J. | last2=Lorimer | first2=D. R. | last3=Turk | first3=P. J. | last4=Mnatsakanov | first4=R. | last5=Lynch | first5=R. S. | last6=Ransom | first6=S. M. | last7=Freire | first7=P. C. | last8=Belczynski | first8=K. | title=Young Radio Pulsars in Galactic Globular Clusters | journal=The Astrophysical Journal | volume=742 | issue=1 | page=51 |date=November 2011 | doi=10.1088/0004-637X/742/1/51 | bibcode=2011ApJ...742...51B | postscript=. |arxiv = 1108.4402 }}</ref>

}}

== 外部連結 ==
* [http://www.astrosurf.com/antilhue/ngc5286.htm NGC 5286]{{Wayback|url=http://www.astrosurf.com/antilhue/ngc5286.htm |date=20150923175644 }} at Astrosurf
* {{WikiSky}}
{{Catalogs|NGC=5286|C=84}}
{{Sky|13|46|00|-|51|22|00}}
{{Ngc55}}
{{科德韦尔天体}}

[[Category:蓋亞-恩克拉多斯| ]]
[[Category:球狀星團]]
[[category:科德韦尔天体|084]]

NGC 5286 - 版本历史

imported>凌雲：​/* 外部連結 */ 增加或調整分類

imported>凌雲：/* 外部連結 */ 增加或調整分類