Near Earth Asteroids [1]
Spaceweather.com-5/26/13
Potentially Hazardous Asteroids (PHAs [2]) 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 [3] all the time.
On May 26, 2013 there were 1397 potentially hazardous asteroids.
Recent & Upcoming Earth-asteroid encounters:
| Asteroid | Date(UT) | Miss Distance | Size |
| 2013 KT1 [4] | May 21 | 3.2 LD | 22 m |
| 2013 KB [5] | May 22 | 3.2 LD | 16 m |
| 2013 KS1 [6] | May 22 | 4.8 LD | 19 m |
| 2004 BV102 [7] | May 25 | 69.9 LD | 1.4 km |
| 1998 QE2 [8] | May 31 | 15.2 LD | 1.6 km |
| 2009 FE [9] | Jun 4 | 9.6 LD | 230 m |
| 2000 FM10 [10] | Jun 5 | 50.3 LD | 1.3 km |
| 2002 KL3 [11] | Jun 6 | 66.4 LD | 1.1 km |
| 1999 WC2 [12] | Jun 12 | 39.2 LD | 1.9 km |
| 2006 RO36 [13] | Jun 18 | 70.9 LD | 1.2 km |
| 2001 PJ9 [14] | Jul 17 | 29.2 LD | 1.1 km |
| 2006 BL8 [15] | Jul 26 | 9.3 LD | 48 m |
| 2003 DZ15 [16] | Jul 29 | 7.6 LD | 153 m |
| 2005 WK4 [17] | Aug 9 | 8.1 LD | 420 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.
Link: Spaceweather.com [18]