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Update on Comet C/2013 A1

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suhuasky 发表于 2013-4-13 12:02 | 显示全部楼层 |阅读模式 来自: 中国–湖南–常德 电信

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Update on Comet C/2013 A1 (Siding Spring)'s Close Flyby of Mars in October 2014
Comet to Make Close Flyby of Red Planet in October 2014
Jet Propulsion Laboratory
April 12, 2013

Update:

New observations of comet C/2013 A1 (Siding Spring) have allowed NASA's
Near-Earth Object Office at the Jet Propulsion Laboratory in Pasadena, Calif.
to further refine the comet's orbit.

Based on data through April 7, 2013, the latest orbital plot places the
comet's closest approach to Mars slightly closer than previous estimates,
at about 68,000 miles (110,000 kilometers). At the same time, the new data
set now significantly reduces the probability the comet will impact the Red
Planet, from about 1 in 8,000 to about 1 in 120,000. The latest estimated
time for close approach to Mars is about 11:51 a.m. PDT (18:51 UTC) on
Oct. 19, 2014. At the time of closest approach, the comet will be on the
sunward side of the planet.
CLEO 发表于 2013-4-13 12:07 | 显示全部楼层 来自: 中国–广东–珠海 电信
有设备的天文爱好者赶快关注更新啦
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dh6290 发表于 2013-4-13 12:42 | 显示全部楼层 来自: 中国–河北–石家庄 联通
全英文啊??小白没看懂,我去百度翻译下
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a125278748 发表于 2013-4-13 12:50 | 显示全部楼层 来自: 中国–福建–厦门 电信
看不懂。版主干嘛不翻译成中文再发?
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