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    In 1999, scientists found a 5 kilometer wide asteroid caught in Earth's gravitational grip. How long does it take this satelline, Cruithne as it is called, to complete a horseshoe-shaped orbit around Earth?

    Question #89904. Asked by BRY2K. (Dec 15 07 6:37 AM)


    Rowena8482

    		It takes slightly less than one year to complete an orbit. Cruithne's orbit is not circular, it has a "kidney bean" shape to it.
    http://en.wikipedia.org/wiki/3753_Cruithne#Dimensions_and_orbit

    Dec 15 07, 6:59 AM
    davejacobs

    		That kidney bean shape is not its actual orbit, which is elliptical round the sun, but its apparent path relative to the earth.


    Dec 15 07, 8:45 AM
    MonkeyOnALeash

    		According to Stephen Fry and Wikipedia it is, at this time, loosely considered Earths "Second Moon".

    http://en.wikipedia.org/wiki/3753_Cruithne

    Dec 15 07, 9:09 AM

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