2012 LZ1

2012 LZ1
发现[1]
發現者Siding Spring Survey (E12)
0.5-m Uppsala Schmidt
發現日期10 June 2012
編號
MPC編號2012 LZ1
小行星分類Amor NEO[2]
軌道參數[2]
曆元 2012-Mar-14
(Uncertainty=2)[2]
遠日點4.066 AU (Q)
近日點1.036 AU (q)
半長軸2.551 AU (a)
離心率0.5937
軌道週期4.08 yr
平近點角334.7° (M)
軌道傾角26.27°
升交點黃經264.6°
近日點參數13.88°
物理特徵
大小~1 km[3]
恆星週期10 - 15 hr[3]
反照率0.02 - 0.04[3]
絕對星等(H)19.8[2]

2012 LZ1 是顆直徑只有1公里的近地小行星, 它在今(2012)年6月14日以14個月地距從地球身邊飛過, 它是由澳洲賽丁泉天文台(Siding Spring Observatory)的Robert H. McNaught(他很有名氣~)及同事在6月10及11日的兩個晚上所發現[4], 全球的天文台相繼投入觀測行列![3]

美國的Arecibo無線電天文台也在六月19日進行觀測, 確認其直徑大小及精準的軌道, 雖然它是對地球有威脅的小行星, 但 LZ1 在將來的750年內對地球的威脅機率是0 !

在2012年, 2012 LZ1從地球旁邊擦身而過時, 最大的星等到達(視)星等13等上下,[5] 下一次的擦身而過是在2016年七月27日, 距地球只有0.5AU (約為194個月地距)! [6]

延伸閱讀

外部連結

  1. ^ MPEC 2012-L30 : 2012 LZ1. IAU Minor Planet Center. 2012-06-12 [2012-06-26]. （原始内容存档于2016-12-24）.  (K12L01Z)
  2. ^ 2.0 2.1 2.2 2.3 JPL Small-Body Database Browser: (2012 LZ1). Jet Propulsion Laboratory. 2012-06-25 [2012-06-26]. （原始内容存档于2019-08-22）. 
  3. ^ 3.0 3.1 3.2 3.3 Stacy Bowles. Arecibo Observatory Finds Asteroid 2012 LZ1 To Be Twice As Big As First Believed. Universities Space Research Association. June 21, 2012 [2012-06-21]. （原始内容存档于2012-06-27）. 
  4. ^ Huge Asteroid to Fly by Earth Thursday: How to Watch Online. Space.com. [2012-06-14]. （原始内容存档于2020-11-12）. 
  5. ^ Humongous asteroid to hurtle past Earth Thursday. Christian Science Monitor. 2012-06-14 [2012-06-14]. （原始内容存档于2017-08-01）. 
  6. ^ 2012 LZ1 Ephemerides for July 2016. NEODyS (Near Earth Objects - Dynamic Site). [2012-06-15]. （原始内容存档于2016-03-04）. 

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