妊神星族
妊神星族是唯一确定的外海王星天体的碰撞家族，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
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] 和 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
参考
- ^ 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.
- ^ 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）.
- ^ Snodgrass, Carry, Dumas, Hainaut. Characterisation of candidate members of (136108) Haumea's family. The Astrophysical Journal. 16 December 2009. .
- ^ Trujillo, Sheppard and Schaller. A Photometric System for Detection of Water and Methane Ices on Kuiper Belt Objects. "The Astrophysical Journal. 14 February 2011. .
- ^ 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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