2011年11月8日的小行星~~~

2qwer

2011年11月8日的小行星~~~

資料來源：http://neo.jpl.nasa.gov/news/news171.html

Asteroid 2005 YU55 to Approach Earth on November 8, 2011Don Yeomans, Lance Benner and Jon Giorgini
March 10, 2011

Trajectory of Asteroid 2005 YU55 - November 8-9, 2011 Click on image for animation

Near-Earth asteroid 2005 YU55 will pass within 0.85 lunar distances from the Earth on November 8, 2011.  The upcoming close approach by this relatively large 400 meter-sized, C-type asteroid presents an excellent opportunity for synergistic ground-based observations including optical, near infrared and radar data.  The attached animated illustration shows the Earth and moon flyby geometry for November 8th and 9th when the object will reach a visual brightness of 11th magnitude and should be easily visible to observers in the northern and southern hemispheres.  The closest approach to Earth and the Moon will be respectively 0.00217 AU and 0.00160 AU on 2011 November 8 at 23:28 and November 9 at 07:13 UT.
Discovered December 28, 2005 by Robert McMillan of the Spacewatch Program near Tucson Arizona, the object has been previously observed by Mike Nolan, Ellen Howell and colleagues with the Arecibo radar on April 19-21, 2010 andshown to be a very dark, nearly spherical object 400 meters in diameter.  Because of its approximate 20-hour rotation period, ideal radar observations should include tracks that are 8 hours or longer on multiple dates at Goldstone (November 3-11) and when the object enters Arecibo's observing window on November 8th.   
Using the Goldstone radar operating in a relatively new "chirp" mode, the November 2011 radar opportunity could result in a shape model reconstruction with a resolution of as fine as 4 meters.  Several days of high resolution imaging (about 7.5 meters) are also planned at Arecibo.  As well as aiding the interpretation of the radar observations, collaborative visual and near infrared observations could define the object'srotation characteristics and provide constraints upon the nature of the object's surface roughness and mineral composition.   
Since the asteroid will approach the Earth from the sunward direction, it will be a daylight object until the time of closest approach.  The best time for new ground-based optical and infrared observations will be late in the day on November 8, after 21:00 hours UT from the eastern Atlantic and western Africa zone. A few hours after its close Earth approach, it will become generally accessible for optical and near-IR observations but will provide a challenging target because of its rapid motion across the sky.

Trajectory of Asteroid 2005 YU55 - November 9, 2011 Edge-on view to the ecliptic plane

Although classified as a potentially hazardous object, 2005 YU55 poses no threat of an Earth collision over at least the next 100 years.  However, this will be the closest approach to date by an object this large that we know about in advance and an event of this type will not happen again until 2028 when asteroid (153814) 2001 WN5 will pass to within 0.6 lunar distances.


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感想：

400米的小行星，應該無什麼事吧？

喵~

0809000

英文麻烦~~~
400对于太空这尺度来说~~~
小的可怜~

2qwer

0809000 发表于 2011-5-6 07:05
英文麻烦~~~
400对于太空这尺度来说~~~
小的可怜~

如果它落在你的頭上，

四米你都覺得大的說~~~

喵~

0809000

2qwer 发表于 2011-5-6 07:14
如果它落在你的頭上，

四米你都覺得大的說~~~

可惜~~就算落在我头上~~我又错过了成为第一个被流星砸死的人~~而被载入史册

2qwer

0809000 发表于 2011-5-6 07:16
可惜~~就算落在我头上~~我又错过了成为第一个被流星砸死的人~~而被载入史册 ...

放心吧，歷史中總有你的位置的說，

或者不是砸中頭，而是其它部位呢~~~

喵~

0809000

2qwer 发表于 2011-5-6 07:23
放心吧，歷史中總有你的位置的說，

或者不是砸中頭，而是其它部位呢~~~

非洲曾经有一次超大规模狮子座流星雨~~~~
怎么被砸死都不少见~~~~

2qwer

0809000 发表于 2011-5-6 07:28
非洲曾经有一次超大规模狮子座流星雨~~~~
怎么被砸死都不少见~~~~

好吧，你其實可以加一點想像力：

首先小行星砸中人造衛星一部份，

然後碎片會砸中高空飛行中的鳥，

飛鳥受驚被砸中後爪中之石失落，

墮下的石頭砸中天空上的大客機，

客機渦輪被砸中後破損導致漏油，

油污凝結後砸中低氣壓的積雨雲，

有毒的雨水砸中正散步的你口中，

最後被証實因隕石而毒發身亡的～～～

喵～

U552

虽说进入了月球公转轨道的范围，但是并没有和黄道相交。
四百米直径的话，如果撞向地球，应该能够引起一定程度的灾害了，不过还要看它的进入角度。
至于楼上说的小故事嘛，其结局应该是被外星病毒或寄生体感染，进而引起人类的变异，最后导致《死亡空间》或《致命拜访》里的那种状况。

0809000

2qwer 发表于 2011-5-6 07:59
好吧，你其實可以加一點想像力：

首先小行星砸中人造衛星一部份，

我尽量争取一下~~看看能不能这么死~~

2qwer

U552 发表于 2011-5-6 09:38
虽说进入了月球公转轨道的范围，但是并没有和黄道相交。
四百米直径的话，如果撞向地球，应该能够引起一定 ...

其實是 "死神來了" Final Destinatio 第五集的說~~~

喵~