Asteroid 1998 QE2 Has a Moon!
Say hello to my little rocky friend: Asteroid (285263) 1998 QE2 has a moon!
The asteroid pair is currently on a relatively near pass of Earth, sailing by us at a closest approach of just under 6 million kilometers (3.6 million miles) later today. Asteroids that get this close are of particular interest to astronomers, because that means we can use radio telescopes to bounce radar off them, which can lead to a better determination of their size, shape, speed, and position.
Using the Goldstone telescope in California, astronomers were surprised to find that 1998 QE2 is actually a binary asteroid, a big rock being orbited by smaller one.
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