| Near Earth Asteroids |
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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!!!]
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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
|
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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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