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1994 WR12

1994 WR12
发现[1]
發現者卡羅琳·舒梅克
帕洛馬山天文台675
發現日期1994年11月28日
編號
其它名稱MPO 57659
小行星分類Aten demo
NEO,PHA
軌道參數[2]
曆元 27 December 1994 (JD 2449713.5)
不確定參數 8
遠日點1.0576 AU(158.21 G米) (Q)
近日點0.45616 AU(68.241 G米) (q)
半長軸0.75686 AU(113.225 G米) (a)
離心率0.39730 (e)
軌道週期0.66 yr (240.5 d)
平近點角174.83° (M)
軌道傾角6.8639° (i)
升交點黃經63.068° (Ω)
近日點參數205.68° (ω)
與地球最小軌道相交距離0.00235897 AU(352,897 km)
與木星最小軌道相交距離4.02184 AU(601.659 G米)
物理特徵
大小〜130 公尺[3]
質量2.9×109 公斤(估計值)[3]
絕對星等(H)22.0[2]

1994 WR12(也可以寫成1994 WR12)是一顆軌道尚不明確[2]近地小行星[2]。在1994年11月26日首度獲得它的影像[2],並且在1994年11月28日被帕洛馬山天文台675)的卡羅琳·舒梅克發現[1]。它的直徑大約130公尺[3],並且被列入哨兵監測表[4]。由於軌道不確定,下一次可能要到2044年才能仔細觀察這顆小行星,屆時它可能以0.03–0.19 au的距離掠過地球[5]

用已知的軌跡但不確定軌道仿真模擬顯示,在2054-2113年會有125次撞擊的威脅[3],這等同於10000次中有1次撞擊地球的機會[3]。對這顆小行星已知軌跡的缺乏(不確定性=8),會因為接近金星水星變得更複雜[5]

估計它的撞擊可以產生77百萬噸TNT的能量[3],大約是有史以來最強大的沙皇炸彈的1.5倍。

相關條目

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參考資料

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  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). 

外部連結

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1994 WR12
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