小行星84922

(84922) 2003 VS2
2003 VS2 (視星等 19.8) 天文學家利用24" 望遠鏡觀測
发现[2]
發現者NEAT (644)
發現日期November 14, 2003[1]
編號
MPC編號(84922) 2003 VS2
其它名稱none
小行星分類Plutino[3][4]
軌道參數[1][3]
曆元 December 31, 2006 (JD 2454100.5)
遠日點42.104 AU (6298.735 Gm)
近日點36.427 AU (5449.350 Gm)
半長軸39.266 AU (5874.042 Gm)
離心率0.072
軌道週期246.05 a (89,870.237 d)
平均軌道速度4.75 km/s
平近點角3.987°
軌道傾角14.798°
升交點黃經302.682°
近日點參數112.586°
物理特徵
大小523.0+35.1
−34.4
 km
[5]
恆星週期7.41±0.02 h[6]
反照率0.147+0.063
−0.043
[5]
溫度≈44 K
光譜類型(紅色) B−V= 0.93±0.02
V−R= 0.59±0.02[5]
視星等19.7[7]
絕對星等(H)4.10±0.38[5]
4.4[8]
4.73±0.02[9]

小行星849222003 VS2)是一顆柯伊伯帶天體,由近地小行星追蹤於2003年11月14日所發現。小行星84922與海王星的軌道共振為3:2,類似冥王星,因此被分類為冥族小天體。

米高·布朗網站將小行星84922分類為高度疑似矮行星天體[10],然而米高·布朗宣稱小行星84922大小可能被高估, 天文學家藉由光變曲線分析可以確認該天體是否達到流體靜力平衡[11]

觀測

小行星84922類似冥王星,與海王星的軌道共振為3:2,雖然其公轉軌道偏心率明顯小於冥王星。小行星84922公轉軌道傾角也小於冥王星。

小行星849222光變曲線震幅為0.21±0.01,自轉週期很可能為7.41±0.02小時[6]

物理性質

2007年,天文學家利用史匹哲太空望遠鏡估計小行星849222直徑為725±200 km.[8]2012年, 天文學家利用赫雪爾太空望遠鏡觀測小行星849222後,其直徑估計為523.0+35.1
−34.4
 km
[5]

參考資料

  1. ^ 1.0 1.1 JPL Small-Body Database Browser: 84922 (2003 VS2) (2008-02-05 last obs). [2008-07-23]. (原始内容存档于2021-06-08). 
  2. ^ Marsden, Brian G. MPEC 2003-W02 : 2003 VS2. IAU Minor Planet Center. Harvard-Smithsonian Center for Astrophysics. 2003-11-16 [2010-01-06]. (原始内容存档于2012-07-12). 
  3. ^ 3.0 3.1 Buie, Marc W. Orbit Fit and Astrometric record for 84922. SwRI (Space Science Department). 2008-02-05 [2008-07-23]. (原始内容存档于2012-07-12). 
  4. ^ MPEC 2006-X45 : Distant Minor Planets. Minor Planet Center & Tamkin Foundation Computer Network. 2006-12-21 [2008-07-23]. (原始内容存档于2008年8月28日). 
  5. ^ 5.0 5.1 5.2 5.3 5.4 M. Mommert, A. W. Harris, C. Kiss, A. Pál, P. Santos-Sanz, J. Stansberry, A. Delsanti, E. Vilenius, T. G. Müller, N. Peixinho, E. Lellouch, N. Szalai, F. Henry, R. Duffard, S. Fornasier, P. Hartogh, M. Mueller, J. L. Ortiz, S. Protopapa, M. Rengel, A. Thirouin. TNOs are cool: A survey of the trans-Neptunian region. Astronomy & Astrophysics. 2012-05-01, 541 [2018-04-02]. ISSN 0004-6361. doi:10.1051/0004-6361/201118562 (英语). 
  6. ^ 6.0 6.1 Scott S. Sheppard. Light Curves of Dwarf Plutonian Planets and other Large Kuiper Belt Objects: Their Rotations, Phase Functions, and Absolute Magnitudes. The Astronomical Journal. 2007, 134 (2): 787 [2018-04-02]. ISSN 1538-3881. doi:10.1086/519072 (英语). 
  7. ^ AstDys (84922) 2003VS2 Ephemerides. Department of Mathematics, University of Pisa, Italy. [2009-12-07]. (原始内容存档于2012-07-12). 
  8. ^ 8.0 8.1 Stansberry, John; Grundy, Will; Brown, Mike; Cruikshank, Dale; Spencer, John; Trilling, David; Margot, Jean-Luc. Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope. Barucci, M. Antonietta; Boehnhardt, Hermann; Cruikshank, Dale P. (编). The Solar System Beyond Neptune (pdf). University of Arizona press. 2008: 161–179 [2015-02-14]. ISBN 0-8165-2755-5. arXiv:astro-ph/0702538可免费查阅. (原始内容存档 (PDF)于2012-09-04). 
  9. ^ Tegler, Stephen C. Kuiper Belt Object Magnitudes and Surface Colors. 2007-02-01 [2009-12-30]. (原始内容存档于2006-09-01). 
  10. ^ Brown, Michael E. How many dwarf planets are there in the outer solar system? (updates daily). California Institute of Technology. [2011-08-25]. (原始内容存档于2011-10-18). 
  11. ^ Tancredi, Gonzalo. Physical and dynamical characteristics of icy "dwarf planets" (plutoids). Proceedings of the International Astronomical Union Symposium S263. 2009, 5: 173–185. Bibcode:2010IAUS..263..173T. doi:10.1017/S1743921310001717.  (Dwarf Planet & Plutoid Headquarters)页面存档备份,存于互联网档案馆

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