How large would a celestial object need to be to alter the earth's orbit?

Subject: How large would a celestial object need to be to alter the earth's orbit?

Date: Mon Aug 11 14:31:43 2008
Posted by Uneeb
Grade level: undergrad School: UMCP
City: College Park State/Province: MD Country: 20742
Area of science: Astronomy
ID: 1218490303.As

Message:


I'm doing research for a short science fiction story I'm writing, I'm wondering
if there were an object possibly the mass of a large asteroid which would orbit
the earth much like the 99942 Apophis then how much influence would it exert
over the course of say a century?

Re: How large would a celestial object need to be to alter the earth's orbit?

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