近地危险小行星距地仅2万km
本帖最后由 q零度星系 于 2012-5-29 12:48 编辑天象预报之近地危险小行星:(北京时间)
小行星2012KT42将于今日15时07分最近地球为20634km或~14000km(非常近)!
该小行星的撞击地球概率:0.001900000%,
质量:2.8e+05 kg,
冲击能量:1.3e-02吨TNT当量,
最大目视星等(北京地区所见):14时58分为11.5等。
直径:4.6 m - 10 m
相对时速:17.02766km/s
2012年5月29日预报
危险啊!::070821_12.jpg:: 这么近::070821_12.jpg:: 看不到
Ernesto Guido, Giovanni Sostero & Nick Howes
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Image taken:
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May. 28, 2012
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Location:
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from the Siding Spring-Faulkes Telescope South on 2012, May 28.4, through a 2.0-m f/10.0 Ritchey-Chretien + CCD.
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Details:
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Tomorrow, May 29, 2012 at about 07:07 UT, the asteroid designated 2012 KT42 will pass only ~14,000 km (8,700 miles) or about ~0.05 lunar distance (or 0.0001379 AU) above the Earth's surface. The asteroid was discovered by Mt. Lemmon Survey with a 1.5-m reflector + CCD on May 28, 2012 at magnitude ~18.1.
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本帖最后由 q零度星系 于 2012-5-29 13:08 编辑
对地球很有危险的小行星名单
几率很高啊 小玩意,不怕,什么时候有过百米的,再通知我。 与1997BR相比(长径~2㎞),只是小巫见大巫。
尽管2012KT42靠得足够近。
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