S/2003 J 23

S/2003 J 23
2003年2月，加法夏望遠鏡拍攝的S/2003 J 23的發現影像
发现 [1]
發現者史考特·雪柏等人
發現地毛納基山天文台
發現日期6 February 2003年2月6日（成像）
January 2004年1月（宣布）
軌道參數 [2]
曆元 17 December 2020年12月17日（JD 2459200.5）
觀測弧14.22 yr（5,193 d）
半長軸0.1649635 AU（24,678,190 km）
離心率0.3207567
軌道週期–2.17 yr（–792.00 d）
平近點角257.08447°
軌道傾角146.15464° （對黃道）
升交點黃經142.40639°
近日點參數295.73090°
隸屬天体木星
物理特徵
反照率0.04 （假定）[3]
視星等23.6[3]
絕對星等(H)16.6[2]

S/2003 J 23是木星的一顆外層天然衛星。它是夏威夷大學史考特·雪柏等人於2004年從2003年的影像中發現[4][1]。

S/2003 J 23的直徑約2公里，在約792天的週期，以24,700,000公里的平均距離繞木星運行，與黃道成146°的傾斜度，沿逆行方向運行，離心率為0.321。

它屬於帕西法厄群，此群的衛星是繞木星運行的不規則逆行衛星，距離在22.8到24.1 Gm之間，傾角範圍在144.5°到158.3°之間。

2003年2月6日發現影像的模擬動畫。
CFHT（加法夏天文台）於2017年2月24日拍攝，再發現S/2003 J 23的影像。

這顆衛星曾被認為是失落的天體[5][6][7][8]。直到2020年末，雪柏和業餘天文學家凱利才分別再找到它[9]。2021 1月13日小行星中心在2011年1月13日宣佈這顆再度發現這顆衛星的，而雪柏隨後於2021年1月27日公佈了他再發現的觀測結果[10][2]。

參考資料

  1. ^ 1.0 1.1 MPEC 2004-B81: S/2003 J 23 （页面存档备份，存于互联网档案馆） 2004 January 31 (discovery and ephemeris)
  2. ^ 2.0 2.1 2.2 MPEC 2021-B136 : S/2003 J 23. Minor Planet Electronic Circular. Minor Planet Center. 27 January 2021 [27 January 2021]. （原始内容存档于2022-11-17）. 
  3. ^ 3.0 3.1 S.S. Sheppard (2019), Moons of Jupiter, Carnegie Science, on line. [2023-04-15]. （原始内容存档于2019-04-24）. 
  4. ^ IAUC 8281: S/2003 J 23 （页面存档备份，存于互联网档案馆） 2004 February 4 (discovery)
  5. ^ Beatty, Kelly. Outer-Planet Moons Found — and Lost. www.skyandtelescope.com. Sky & Telescope. 4 April 2012 [27 June 2017]. （原始内容存档于2017-06-07）. 
  6. ^ Brozović, Marina; Jacobson, Robert A. The Orbits of Jupiter's Irregular Satellites. The Astronomical Journal. 9 March 2017, 153 (4): 147. Bibcode:2017AJ....153..147B. doi:10.3847/1538-3881/aa5e4d 可免费查阅. 
  7. ^ Jacobson, B.; Brozović, M.; Gladman, B.; Alexandersen, M.; Nicholson, P. D.; Veillet, C. Irregular Satellites of the Outer Planets: Orbital Uncertainties and Astrometric Recoveries in 2009–2011. The Astronomical Journal. 28 September 2012, 144 (5): 132. Bibcode:2012AJ....144..132J. S2CID 123117568. doi:10.1088/0004-6256/144/5/132. 
  8. ^ Sheppard, Scott S. New Moons of Jupiter Announced in 2017. home.dtm.ciw.edu. 2017 [27 June 2017]. （原始内容存档于2017-06-10）. We likely have all of the lost moons in our new observations from 2017, but to link them back to the remaining lost 2003 objects requires more observations a year later to confirm the linkages, which will not happen until early 2018. ... There are likely a few more new moons as well in our 2017 observations, but we need to reobserve them in 2018 to determine which of the discoveries are new and which are lost 2003 moons. 
  9. ^ Hecht, Jeff. Amateur Astronomer Finds "Lost" Moons of Jupiter. www.skyandtelescope.com. Sky & Telescope. 2021-01-11 [2021-01-11]. （原始内容存档于2021-11-09）. 
  10. ^ MPEC 2021-A168 : S/2003 J 23. Minor Planet Electronic Circular. Minor Planet Center. 13 January 2021 [13 January 2021]. 

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