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Posts Tagged ‘Potentially Hazardous Asteroids’

                                   Near Earth Asteroids

Potentially Hazardous Asteroids (PHAs)   are space rocks larger than approximately 100m that  can come closer to Earth than 0.05 AU. None of the known PHAs is on a collision course with our planet,  although astronomers are finding new  ones   all the time.

As of today –  February 21, 2012  – there were 1287   potentially hazardous asteroids. [1287!!!]
Recent  & Upcoming Earth-asteroid encounters:

Asteroid
Date(UT)
Miss       Distance
Mag.
Size
2009 AV
Feb 16
44.9 LD
1.1 km
2000 ET70
Feb 19
17.7 LD
1.0 km
2012 DF4
Feb 21
3.4 LD
30 m
2012 DX
Feb 21
2 LD
17 m
2012 DZ
Feb 22
2.5 LD
26 m
2011 CP4
Feb 23
9.1 LD
255 m
2012 DY
Feb 24
9.2 LD
20 m
2012 CS46
Feb 25
2.7 LD
12 m
2008 EJ85
Mar 6
9.1 LD
44 m
1999 RD32
Mar 14
57.9 LD
2.4 km
2011 YU62
Mar 16
73.4 LD
1.3 km
1996 SK
Apr 18
67.2 LD
1.6 km
2007 HV4
Apr 19
4.8 LD
8 m
2011 WV134
Apr 28
38.6 LD
1.8 km

Notes:LD means “Lunar Distance.” 1 LD = 384,401 km, the distance                             between Earth and the Moon. 1 LD also equals 0.00256  AU. MAG is the visual magnitude of the asteroid on the date of closest approach.

from http://www.spaceweather.com

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