小行星1089

多摩星
发现
發現者及川奥郎
發現地东京
發現日期1927年11月17日
編號
命名依據多摩川
其它名稱A894 VA; A904 VD;
A919 HA; 1927 WB;
1930 ST; 1952 HE4
小行星分類主带小行星
軌道參數
曆元 2005年11月26日 (JD 2453700.5)
遠日點2.497 AU
近日點1.930 AU
半長軸2.213 AU
離心率0.128
軌道週期1202.846 d(3.29 a)
平均軌道速度19.94 km/s
平近點角236.255°
軌道傾角3.730°
升交點黃經71.565°
近日點參數354.336°
物理特徵
大小13.44 ± 0.61 km
質量(8.90 ± 3.20) × 1014[1] kg
平均密度2.52 ± 0.29[1] g/cm3
表面重力0.0036? m/s²
0.0068? km/s
自轉週期0.6852±0.0002 d
反照率0.24
溫度~179 K
光譜類型?
絕對星等(H)11.6

小行星1089(多摩星,1089 Tama),于1927年11月17日由东京帝国大学天文台(今东京天文台)发现,以该天文台附近的河流多摩川命名。

卫星

2004年,小行星1089被发现有一颗直径约9km的卫星,命名为“S/2003 (1089) 1”。此发现基于2003年12月24日至2004年1月5日的光度观测,这个结果随后发表于1月24日。卫星距主星约20km,公转周期0.6852±0.0002天。[2]

参考资料

  1. ^ 1.0 1.1 Carry, B., Density of asteroids, Planetary and Space Science 73, December 2012, 73: 98-118, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  2. ^ * IAUC 8265页面存档备份,存于互联网档案馆
前一小行星:
(1088)小行星1088
小行星列表 後一小行星:
(1090)小行星1090

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