Showing posts with label Earth-asteroids. Show all posts
Showing posts with label Earth-asteroids. Show all posts

07 February 2009

Near-Earth Astroids PHAs 6FEB2009

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.
http://spaceweather.com/

On February 6, 2009 there were 1022 potentially hazardous asteroids.
Feb. 2009 Earth-asteroid encounters:
Asteroid//Date(UT)//Miss Distance//Mag.//Size
2009 BK58//Feb. 2 //1.7 LD//17//30 m
2009 BW2//Feb. 5 //8.4 LD//20//40 m
2009 BE58//Feb. 10 //8.6 LD//16//225 m
2006 AS2 //Feb. 10//9.2 LD//15//370 m
2009 BL58 //Feb. 11//4.8 LD//17//55 m
1999 AQ10 //Feb. 18//4.4 LD//13//390 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.