《2012 BX34》小行星今日将飞过地球【图】

《2012 BX34》小行星今日将飞过地球【图】

27.01.2012, 16:32

据报道，一颗小行星周五将飞过地球。《2012 BX34》的直径约为二十米。约距离地球三万公里。天文学家在两天前发现了这颗小行星。根据科学家的看法，小行星撞到地球的可能性极小。



来源：
《俄罗斯之声》
h t t p : / / chinese.ruvr.ru/2012/01/27/64763358.html


The small asteroid 2012 BX34 discovered this week will approach Earth today less than 80.000 km. I took this picture yesterday night and it show the faint trail of 2012 BX34 (mag 17,7) that is moving near galaxy NGC 4488 (Chiona di Berenice) RCOS 20" f.7 Sbig 1100 bin 2x2 300sec E

Background

2012 BX34 was discovered by the Catalina Sky Survey on January 25, 2012, and it will make a very close approach within 0.17 lunar distances (0.004 AU) on January 27.  
We are planning to observe it on Jan. 27 using time previously scheduled for observations of 433 Eros.  

The absolute magnitude of 27.5 suggests a diameter within a factor of two of about 10 meters, but otherwise nothing is known about its physcial properties.  

Orbital and Physical Characteristics

orbit type	Aten
semimajor axis	0.799  AU
eccentricity	0.311
inclination	12.0 deg
perihelion distance	0.551 AU
aphelion distance	1.048 AU
absolute magnitude (H)	27.5
diameter	10 m (within a factor of two)
rotation period	unknown
pole direction	unknown
lightcurve amplitude	unknown
spectral class	unknown

来源：
2012 BX34 Goldstone Radar Observations Planning
h t t p : / / echo.jpl.nasa.gov/asteroids/2012BX34/2012BX34_planning.html

相关网页：
Minor Planet Center
h t t p : / / w w w .minorplanetcenter.net/mpec/K12/K12B62.html

Asteroid to make near-miss fly-by

27 January 2012 Last updated at 09:51 GMT

An asteroid will pass by the Earth on Friday in something of a cosmic near-miss, making its closest approach at about 1600 GMT.

The asteroid, estimated to be about 11m (36ft) in diameter, was first detected on Wednesday.

At its closest, the space rock - named 2012 BX34 - will pass within about 60,000km of Earth - less than a fifth of the distance to the Moon.

Astronomers stress that there is no cause for concern.

"It's one of the closest approaches recorded," said Gareth Williams, associate director of the US-based Minor Planet Center.

"It makes it in to the top 20 closest approaches, but it's sufficiently far away... that there's absolutely no chance of it hitting us," he told the BBC.

The asteroid's path makes it the closest space-rock to pass by the Earth since object 2011 MD in June 2011.

Earlier estimates put the asteroid's closest distance at as little as 20,000km, near the distance at which geostationary satellites reside, but observations by observatories overnight showed it will pass at a more comfortable distance.

Although the asteroid will not be visible to the naked eye, Dr Williams said that keen backyard astronomers could get a look.

"We've had three sets of observations in the last few hours from amateur observers in the UK," he said.

来源：
h t t p : / / w w w .bbc.co.uk/news/science-environment-16756450

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---

只要伊朗伊斯兰共和国革命军卫队挖到两千五百米特深，就肯定能对付敌方的入侵威胁，
将把地下军事设施挖到四千米超深，伊朗伊斯兰共和国一定能取得胜利！
　　——伊朗伊斯兰共和国总统马哈茂德·艾哈迈迪内贾德

---

《2012 BX34》小行星今日将飞过地球【图】

27.01.2012, 16:32

据报道，一颗小行星周五将飞过地球。《2012 BX34》的直径约为二十米。约距离地球三万公里。天文学家在两天前发现了这颗小行星。根据科学家的看法，小行星撞到地球的可能性极小。



来源：
《俄罗斯之声》
h t t p : / / chinese.ruvr.ru/2012/01/27/64763358.html


The small asteroid 2012 BX34 discovered this week will approach Earth today less than 80.000 km. I took this picture yesterday night and it show the faint trail of 2012 BX34 (mag 17,7) that is moving near galaxy NGC 4488 (Chiona di Berenice) RCOS 20" f.7 Sbig 1100 bin 2x2 300sec E

Background

2012 BX34 was discovered by the Catalina Sky Survey on January 25, 2012, and it will make a very close approach within 0.17 lunar distances (0.004 AU) on January 27.  
We are planning to observe it on Jan. 27 using time previously scheduled for observations of 433 Eros.  

The absolute magnitude of 27.5 suggests a diameter within a factor of two of about 10 meters, but otherwise nothing is known about its physcial properties.  

Orbital and Physical Characteristics
orbit type Aten semimajor axis   0.799  AU eccentricity 0.311 inclination 12.0 deg perihelion distance 0.551 AU aphelion distance 1.048 AU absolute magnitude (H) 27.5 diameter 10 m (within a factor of two) rotation period unknown pole direction unknown lightcurve amplitude unknown spectral class unknown

来源：
2012 BX34 Goldstone Radar Observations Planning
h t t p : / / echo.jpl.nasa.gov/asteroids/2012BX34/2012BX34_planning.html

相关网页：
Minor Planet Center
h t t p : / / w w w .minorplanetcenter.net/mpec/K12/K12B62.html

Asteroid to make near-miss fly-by

27 January 2012 Last updated at 09:51 GMT

An asteroid will pass by the Earth on Friday in something of a cosmic near-miss, making its closest approach at about 1600 GMT.

The asteroid, estimated to be about 11m (36ft) in diameter, was first detected on Wednesday.

At its closest, the space rock - named 2012 BX34 - will pass within about 60,000km of Earth - less than a fifth of the distance to the Moon.

Astronomers stress that there is no cause for concern.

"It's one of the closest approaches recorded," said Gareth Williams, associate director of the US-based Minor Planet Center.

"It makes it in to the top 20 closest approaches, but it's sufficiently far away... that there's absolutely no chance of it hitting us," he told the BBC.

The asteroid's path makes it the closest space-rock to pass by the Earth since object 2011 MD in June 2011.

Earlier estimates put the asteroid's closest distance at as little as 20,000km, near the distance at which geostationary satellites reside, but observations by observatories overnight showed it will pass at a more comfortable distance.

Although the asteroid will not be visible to the naked eye, Dr Williams said that keen backyard astronomers could get a look.

"We've had three sets of observations in the last few hours from amateur observers in the UK," he said.

来源：
h t t p : / / w w w .bbc.co.uk/news/science-environment-16756450

---

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•二零一二年一月十九日 太阳黑子1402 M3.2级日冕物質拋射[图]
•神秘三角形“不明飞行物”引发美国大争论 NASA揭秘成因 [图]
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•一九七〇年无线电爱好者记录我第一颗『东方红一号』地球人造卫星播送的乐曲 【乐曲】
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---

只要伊朗伊斯兰共和国革命军卫队挖到两千五百米特深，就肯定能对付敌方的入侵威胁，
将把地下军事设施挖到四千米超深，伊朗伊斯兰共和国一定能取得胜利！
　　——伊朗伊斯兰共和国总统马哈茂德·艾哈迈迪内贾德

---