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妊神星族

维基百科,自由的百科全书

妊神星族是唯一确定的外海王星天体碰撞家族,也就是说,外海王星天体类似轨道参数(外海王星天体)只有组谱(近纯净冰水),这就意味着他们的是互相碰撞的较原始的星体。[1]计算表明,它可能是唯一的外海王星碰撞家族。[2]

特征

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妊神星族(绿色)

矮行星妊神星是家族成员中最大的天体,其他成员为妊神星的卫星以及柯伊伯带天体 (55636) 2002 TX300, (24835) 1995 SM55, (19308) 1996 TO66, (120178) 2003 OP32, (145453) 2005 RR43, (86047) 1999 OY3, 2003 UZ117, 2005 CB79, 2003 SQ317[3]2009 YE7[4] 等,所有离散速度低于妊神星,或不到150米/ 秒,尺寸在400到700公里之间,虽然,这使他们成为矮行星的可能,但高反照率可能会影响这些它们的入选矮行星的行列,成员中,在分散的正轨道要素的仅为几个百分点或更少(半长轴5%,倾角1.4°,偏心率0.08)。右图说明了家族成员的其他外海王星天体的关系以及各自轨道。 这些天体的共同的物理特征包括中性色和深红外线吸收功能。[5]

参见

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参考

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  1. ^ Brown, Michael E.; Barkume, Kristina M.; Ragozzine, Darin; Schaller, Emily L. A collisional family of icy objects in the Kuiper belt. Nature. 2007, 446 (7133): 294–296. PMID 17361177. doi:10.1038/nature05619. 
  2. ^ Harold F. Levison, Alessandro Morbidelli, David Vokrouhlický and William F. Bottke. On a Scattered Disc Origin for the 2003 EL61 Collisional Family— an Example of the Importance of Collisions in the Dynamics of Small Sodies. The Astronomical Journal. 2008, 136: 1079–1088 [2008-09-19]. doi:10.1088/0004-6256/136/3/1079. (原始内容存档于2020-05-29). 
  3. ^ Snodgrass, Carry, Dumas, Hainaut. Characterisation of candidate members of (136108) Haumea's family. The Astrophysical Journal. 16 December 2009. . 
  4. ^ Trujillo, Sheppard and Schaller. A Photometric System for Detection of Water and Methane Ices on Kuiper Belt Objects. "The Astrophysical Journal. 14 February 2011. . 
  5. ^ N. Pinilla-Alonso, J. Licandro, R. Gil-Hutton and R. Brunetto The water ice rich surface of (145453) 2005 RR43: a case for a population of carbon-depleted TNOs?, A&A 468, L25-L28 (2007) [1]页面存档备份,存于互联网档案馆
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