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1994 WR12

1994 WR12
发现[1]
发现者卡罗琳·舒梅克
帕洛马山天文台675
发现日期1994年11月28日
编号
其它名称MPO 57659
小行星分类Aten demo
NEO,PHA
轨道参数[2]
历元 27 December 1994 (JD 2449713.5)
不确定参数 8
远日点1.0576 AU(158.21 G米) (Q)
近日点0.45616 AU(68.241 G米) (q)
半长轴0.75686 AU(113.225 G米) (a)
离心率0.39730 (e)
轨道周期0.66 yr (240.5 d)
平近点角174.83° (M)
轨道倾角6.8639° (i)
升交点黄经63.068° (Ω)
近日点参数205.68° (ω)
与地球最小轨道相交距离0.00235897 AU(352,897 km)
与木星最小轨道相交距离4.02184 AU(601.659 G米)
物理特征
大小〜130 米[3]
质量2.9×109 公斤(估计值)[3]
绝对星等(H)22.0[2]

1994 WR12(也可以写成1994 WR12)是一颗轨道尚不明确[2]近地小行星[2]。在1994年11月26日首度获得它的影像[2],并且在1994年11月28日被帕洛马山天文台675)的卡罗琳·舒梅克发现[1]。它的直径大约130米[3],并且被列入哨兵监测表[4]。由于轨道不确定,下一次可能要到2044年才能仔细观察这颗小行星,届时它可能以0.03–0.19 au的距离掠过地球[5]

用已知的轨迹但不确定轨道仿真模拟显示,在2054-2113年会有125次撞击的威胁[3],这等同于10000次中有1次撞击地球的机会[3]。对这颗小行星已知轨迹的缺乏(不确定性=8),会因为接近金星水星变得更复杂[5]

估计它的撞击可以产生77百万吨TNT的能量[3],大约是有史以来最强大的沙皇炸弹的1.5倍。

相关条目

参考资料

  1. ^ 1.0 1.1 MPEC 1994-Y05 : 1994 WR12. IAU Minor Planet Center. 1994-12-21 [2011-10-17]. (原始内容存档于2016-03-03). 
  2. ^ 2.0 2.1 2.2 2.3 2.4 JPL Small-Body Database Browser: (1994 WR12) (last observation: 1994-12-31; arc: 35 days; Uncertainty: 8). Jet Propulsion Laboratory. [29 March 2016]. (原始内容存档于2019-08-21). 
  3. ^ 3.0 3.1 3.2 3.3 3.4 3.5 Earth Impact Risk Summary: 1994 WR12. NASA/JPL Near-Earth Object Program Office. [2014-07-08]. (原始内容存档于2016-03-26). 
  4. ^ Sentry Risk Table. NASA/JPL Near-Earth Object Program Office. 14 Oct 2011 [2011-10-17]. (原始内容存档于2013-05-29). 
  5. ^ 5.0 5.1 JPL Close-Approach Data: (1994 WR12) (last observation: 1994-12-31; arc: 35 days; Uncertainty: 8). [2011-04-07]. (原始内容存档于2020-10-29). 

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1994 WR12
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