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Actaea (卫星)

Actaea
发现
发现者Keith S. Noll, Harold F. Levison, Denise C. Stephen, William M. Grundy
发现日期2006年7月21日
编号
MPC编号(120347) Salacia I Actaea
其它名称S/2006 (120347) 1
轨道参数
半长轴5 619 ± 87 千米
离心率0,0084 ± 0,0076
轨道周期5,49380 ± 0,00016 天
轨道倾角
隶属天体小行星120347
物理特征
大小284±10 km[1]

Actaea,官方名称(120347) Salacia I Actaea,是柯伊伯带天体小行星120347已知拥有的卫星

发现

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它在2006年被Keith S. Noll, Harold Levison, Denise Stephens 和 Will Grundy通过哈勃望远镜发现。[2]它在2011年2月18日获得正式名称“Actaea”,是希腊神话中的一种海洋女神——涅瑞伊得斯

轨道

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Actaea以约5.49天的周期环绕主星公转,相距5619千米,轨道离心率约0.0084。[3]

性质

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Actaea比小行星120347暗约2星等,意味着相同反照率下有2.98的直径比例。假设反照率与小行星120347相同,它的直径约303千米。它与小行星120347有着一样的颜色(分别是V−I = 0.89±0.02和0.87±0.01),支持了反照率相同的假设[4]。该系统较低的密度表明小行星120347与Actaea由水冰构成。小行星120347与Actaea下一次的互相遮盖将在2067年。此系统的质量为4,66 ± 0,22 × 1020 千克,约有4%集中在Actaea。

参考文献

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  1. ^ Grundy, W. M.; Noll, K. S.; Roe, H. G.; Buie, M. W.; Porter, S. B.; Parker, A. H.; Nesvorný, D.; Benecchi, S. D.; Stephens, D. C.; Trujillo, C. A. Mutual Orbit Orientations of Transneptunian Binaries (PDF). Icarus. 2019, 334: 62–78 [26 October 2019]. Bibcode:2019Icar..334...62G. ISSN 0019-1035. doi:10.1016/j.icarus.2019.03.035. (原始内容存档 (PDF)于2020-01-15). 
  2. ^ 存档副本. [2016-04-28]. (原始内容存档于2020-02-13). 
  3. ^ 存档副本. [2016-04-28]. (原始内容存档于2020-11-08). 
  4. ^ 存档副本. [2016-04-28]. (原始内容存档于2015-11-17). 
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Actaea (卫星)
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