Potentially Hazardous Asteroids 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.
On March 4, 2011 there were 1203 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
|
Asteroid |
Date(UT) |
Miss Distance |
Mag. |
Size |
|
2011 EB |
Feb 26 |
2.4 LD |
-- |
18 m |
|
2011 DQ |
Feb 26 |
9.7 LD |
-- |
26 m |
|
2011 DT9 |
Feb 27 |
9 LD |
-- |
39 m |
|
2011 DE5 |
Mar 1 |
4.9 LD |
-- |
22 m |
|
2011 DW4 |
Mar 3 |
6.9 LD |
-- |
15 m |
|
2011 EC |
Mar 6 |
9.2 LD |
-- |
33 m |
|
2000 PN9 |
Mar 10 |
45.5 LD |
-- |
2.6 km |
|
2002 DB4 |
Apr 15 |
62.5 LD |
-- |
2.2 km |
|
2008 UC202 |
Apr 27 |
8.9 LD |
-- |
10 m |
|
2009 UK20 |
May 2 |
8.6 LD |
-- |
23 m |
|
2008 FU6 |
May 5 |
75.5 LD |
-- |
1.2 km |
|
2003 YT1 |
May 5 |
65.3 LD |
-- |
2.5 km |
|
2002 JC |
Jun 1 |
57.5 LD |
-- |
1.6 km |
|
2009 BD |
Jun 2 |
0.9 LD |
-- |
9 m |
|
2002 JB9 |
Jun 11 |
71.5 LD |
-- |
3.2 km |
|
2001 VH75 |
Jun 12 |
42.2 LD |
-- |
1.1 km |
|
2004 LO2 |
Jun 15 |
9.9 LD |
-- |
48 m |
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.
SpaceWeather.com
