NGC 5286

NGC 5286
NGC 5286
	NGC 5286（中央）与半人马M
观测数据(J2000 历元)
分类	V
星座	半人马座
赤经	13h 46m 26.81s
赤纬	–51° 22′ 27.3″
距离	35.9 kly（11.0 kpc）
视星等 (V)	7.6
物理性质
Mass	7.13×105 M☉
金属量	–1.41 dex
估计年龄	12.54 Gyr
其它名称	科德韦尔 84
	参见：球状星团，球状星团表

NGC 5286，也称为科德韦尔84，是由恒星组成的一个球状星团，位置在半人马座，距离地球35,900^[3]光年。在这个距离，来自这个星团的光经历了星际气体和尘埃的红化，因此在UBV测光系统的E(B – V)=0.24星等。在这个星团的北方4角分有一颗裸眼可见的恒星半人马M（4.65等）^[6]。它是苏格兰天文学家詹姆士·丹露帕在澳洲发现的，并且列在他于1827年编辑的星表内^[7]。

这个星团距离银河中心29 kly（8.9 kpc），目前正在银晕内环绕着银河。它可能与麒麟座环，一个从矮星系形成但已经断裂的恒星潮汐流，有所关联。NGC 5286可能是银河系内最古老的球状星团^[6]，估计他的年龄是125.4亿岁^[5]。它不是个完美的球形，投影有着0.12的扁率^[6]。

星团中心恒星的速度弥散度是(8.1 ± 1.0) 公里/秒。根据在这个星团中心的恒星运动，它可能拥有的中介质量黑洞的质量不到星团质量的1%，而估计整个星团的质量上限是6,000太阳质量 ^[6]。

参考资料

^ Shapley, Harlow; Sawyer, Helen B., A Classification of Globular Clusters, Harvard College Observatory Bulletin, August 1927, (849): 11–14, Bibcode:1927BHarO.849...11S.
^ ^2.0 ^2.1 Goldsbury, Ryan; et al, The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters, The Astronomical Journal, December 2010, 140 (6): 1830–1837, Bibcode:2010AJ....140.1830G, arXiv:1008.2755 , doi:10.1088/0004-6256/140/6/1830.
^ ^3.0 ^3.1 Paust, Nathaniel E. Q.; et al, The ACS Survey of Galactic Globular Clusters. VIII. Effects of Environment on Globular Cluster Global Mass Functions, The Astronomical Journal, February 2010, 139 (2): 476–491, Bibcode:2010AJ....139..476P, doi:10.1088/0004-6256/139/2/476.
^ Boyles, J.; et al, Young Radio Pulsars in Galactic Globular Clusters, The Astrophysical Journal, November 2011, 742 (1): 51, Bibcode:2011ApJ...742...51B, arXiv:1108.4402 , doi:10.1088/0004-637X/742/1/51.
^ ^5.0 ^5.1 ^5.2 Forbes, Duncan A.; Bridges, Terry, Accreted versus in situ Milky Way globular clusters, Monthly Notices of the Royal Astronomical Society, May 2010, 404 (3): 1203–1214, Bibcode:2010MNRAS.404.1203F, arXiv:1001.4289 , doi:10.1111/j.1365-2966.2010.16373.x.
^ ^6.0 ^6.1 ^6.2 ^6.3 Feldmeier, A.; et al, Indication for an intermediate-mass black hole in the globular cluster NGC 5286 from kinematics, Astronomy & Astrophysics, June 2013, 554: A63, Bibcode:2013A&A...554A..63F, arXiv:1304.4176 , doi:10.1051/0004-6361/201321168.
^ O'Meara, Stephen James, The Caldwell Objects, Cambridge University Press: 337, 2002.

外部链接

NGC 5286（页面存档备份，存于互联网档案馆） at Astrosurf
WikiSky上关于NGC 5286的内容：DSS2, SDSS, GALEX, IRAS, 氢α, X射线, 天文照片, 天图, 文章和图片

天文学目录
NGC天体表：	NGC 5284 - NGC 5285 - NGC 5286 - NGC 5287 - NGC 5288
科德韦尔深空天体表：	C82 - C83 - C84 - C85 - C86

[hcob849_11-1] Shapley, Harlow; Sawyer, Helen B., A Classification of Globular Clusters, Harvard College Observatory Bulletin, August 1927, (849): 11–14, Bibcode:1927BHarO.849...11S.

[aj140_6_1830-2] 2.0 ^2.1 Goldsbury, Ryan; et al, The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters, The Astronomical Journal, December 2010, 140 (6): 1830–1837, Bibcode:2010AJ....140.1830G, arXiv:1008.2755 , doi:10.1088/0004-6256/140/6/1830.

[aj139_2_476-3] 3.0 ^3.1 Paust, Nathaniel E. Q.; et al, The ACS Survey of Galactic Globular Clusters. VIII. Effects of Environment on Globular Cluster Global Mass Functions, The Astronomical Journal, February 2010, 139 (2): 476–491, Bibcode:2010AJ....139..476P, doi:10.1088/0004-6256/139/2/476.

[apj742_1_51-4] Boyles, J.; et al, Young Radio Pulsars in Galactic Globular Clusters, The Astrophysical Journal, November 2011, 742 (1): 51, Bibcode:2011ApJ...742...51B, arXiv:1108.4402 , doi:10.1088/0004-637X/742/1/51.

[mnras404_3_1203-5] 5.0 ^5.1 ^5.2 Forbes, Duncan A.; Bridges, Terry, Accreted versus in situ Milky Way globular clusters, Monthly Notices of the Royal Astronomical Society, May 2010, 404 (3): 1203–1214, Bibcode:2010MNRAS.404.1203F, arXiv:1001.4289 , doi:10.1111/j.1365-2966.2010.16373.x.

[AAA554_A63-6] 6.0 ^6.1 ^6.2 ^6.3 Feldmeier, A.; et al, Indication for an intermediate-mass black hole in the globular cluster NGC 5286 from kinematics, Astronomy & Astrophysics, June 2013, 554: A63, Bibcode:2013A&A...554A..63F, arXiv:1304.4176 , doi:10.1051/0004-6361/201321168.

[OMeara2002-7] O'Meara, Stephen James, The Caldwell Objects, Cambridge University Press: 337, 2002.

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查论编科德韦尔天体
列表	C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 C64 C65 C66 C67 C68 C69 C70 C71 C72 C73 C74 C75 C76 C77 C78 C79 C80 C81 C82 C83 C84 C85 C86 C87 C88 C89 C90 C91 C92 C93 C94 C95 C96 C97 C98 C99 C100 C101 C102 C103 C104 C105 C106 C107 C108 C109
参看	梅西耶天体星云和星团总表 NGC天体表赫歇尔目录
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