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On Wednesday, February 20, 2013 3:11:38 AM UTC-8, wrote:
On Feb 19, 10:39*am, Chris L Peterson wrote: On Tue, 19 Feb 2013 03:09:28 -0800 (PST), wrote: A satellite of a closely approaching asteroid could be moving in any direction relative to the Earth. *However, 2012 DA14 was several hundred thousand kilometers away from the meteoroid, orders of magnitude more than the typical distance of an asteroid moon. Asteroid 2012 DA14 was very small, with a very low escape velocity. A fragment of DA14 could be very far away from it (the existence of a fragment is much more likely than of a satellite). But it would still be in the same orbit as DA14, and therefore couldn't have produced the Russian fireball. The OP wasn't asking about a fragment with a similar/identical orbit, but about a satellite which might have been in orbit around the asteroid. Same answer, whether is was a fragment or a satellite. It would still be in a similar orbit wrt the Sun & Earth, much as the moon has an orbit around the Sun that is similar to Earth's. |
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