The mysterious artificial object has apparently made a close pass by the Earth, coming in almost to the distance of the Moon's orbit, and is now headed away again into the interplanetary void. The object has used no propulsion during the time NASA has had it under observation. However the spacewatch boffins believe that it must have moved under its own power at some point, given its position and velocity.
The experts believe that the object must be a spacecraft, or more accurately part of one - sadly not an alien visitor, though. Rather it's likely to be a booster stage from an interplanetary mission of the past, now drifting back in to Earth and out again. The next visit will probably be 2036, at which time there's a small chance that 2010 KQ will crash into the atmosphere and burn up. ®
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