Newly discovered asteroid 2007 HA is flying past Earth today about 2.5 million kilometers away.
It’s big (300 meters wide), bright (13th magnitude), and an easy target for large
backyard telescopes. Last night, Greg Selleck of Madison, Wisconsin, made this 75-minute movie (1.8 MB mpeg) of the space rock racing 47,000 mph through the constellation Virgo. Tonight the asteroid streaks across the Big Dipper.
If skies clear enough we might be able to see it. But there are lots more this month.
Today there were 858 known Potentially Hazardous 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.
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