小行星120347

120347 Salacia
由赫雪爾太空望遠鏡拍攝的漾神星
发现
發現者Henry G. Roe, 米高·E·布朗, Kristina M. Barkume
發現日期2004年9月22日
編號
MPC編號(120347) 2004 SB60
小行星分類QB1天体 (MPC)[1]
独立天体 (DES)[2]
軌道參數[4]
遠日點46.5395 AU
近日點37.8383 AU
半長軸42.1889 AU
離心率0.10312
軌道週期274.03 yr (100091 d)
平近點角113.75°
軌道傾角23.9396°
升交點黃經280.1885°
近日點參數311.078°
已知衛星Actaea
(286 ± 24 km)
物理特徵
大小854 ± 45[5]
905±103 km[6]
質量4.5×1020 kg[6]
4.66×1020 kg (system mass)[6]
平均密度1.16+0.59
−0.36 g/cm³[6]
恆星週期6.09 h[4]
反照率0.035+0.010
−0.007[6]
絕對星等(H)4.2[4]

小行星120347（120347 Salacia），曾用臨時編號2004 SB60，是一颗海王星外天体，位於柯伊伯带，轨道半径略微大于冥王星。其直径约为850公里，是一颗较大的绕日小星体，被认为有可能成为一颗矮行星。该星体于2004年9月22日由Henry G. Roe、米高·E·布朗和Kristina M. Barkume发现。

命名

国际天文学会於2011年2月18日将小行星120347正式命名为Salacia。Salacia（萨拉喀亚）是罗马神话中尼普顿（海王星）的妻子。罗马神话的尼普顿就是希腊神话的海王波塞冬；而他的妻子，罗马神话中的萨拉喀亚就是希腊神话的安菲特里忒（希腊语：Ἀμφιτρίτη）。Salacia是海水女神，其名字的词根为salt，即为咸水。

中國天文學會2012年和2018年分别收到「潫神星」和「漾神星」的翻譯推薦，但截至2020年底尚未入庫。[7]

卫星

小行星120347拥有一颗已知的卫星Actaea。

参考文献

  1. ^ MPEC 2009-R09 :Distant Minor Planets (2009 SEPT. 16.0 TT). IAU Minor Planet Center. 2009-09-04 [2011-07-05]. （原始内容存档于2018-10-02）. 
  2. ^ Marc W. Buie. Orbit Fit and Astrometric record for 120347. SwRI (Space Science Department). 2007-08-12 using 62 of 73 observations [2009-10-04]. （原始内容存档于2012-07-15）. 
  3. ^ sa-LAY-shee-ə, sə-LAY-shə
  4. ^ 4.0 4.1 4.2 JPL Small-Body Database Browser: 120347 (2004 SB60). 2010-11-05 [2012-05-07]. （原始内容存档于2012-07-15）. 
  5. ^ S. Fornasier, E. Lellouch, T. Müller, P. Santos-Sanz, P. Panuzzo, C. Kiss, T. Lim, M. Mommert, D. Bockelée-Morvan, E. Vilenius, J. Stansberry, G.P. Tozzi, S. Mottola, A. Delsanti, J. Crovisier, R. Duffard, F. Henry, P. Lacerda, A. Barucci, & A. Gicquel (2013). TNOs are Cool: A survey of the trans-Neptunian region. VIII. Combined Herschel PACS and SPIRE observations of 9 bright targets at 70–500 µm. （页面存档备份，存于互联网档案馆）
  6. ^ 6.0 6.1 6.2 6.3 6.4 J.A. Stansberry. Physical Properties of Trans-Neptunian Binaries (120347) Salacia–Actaea and (42355) Typhon–Echidna. Elsevier. 2012 [2012-04-27]. （原始内容存档于2015-09-24）. 
  7. ^ 存档副本. [2018-12-19]. （原始内容存档于2020-10-04）. 

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