cruithne in A Sentence

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    They're called 3753 Cruithne and 2002 AA29.

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    Cruithne is 5 km across, and sometimes called Earth's second moon.

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    Cruithne is 5 km crosswise over and at times called Earth's second moon.

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    Asteroids 3753 Cruithne and 2002 AA29 have complicated orbital relationships with the Earth;

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    Because of this, Cruithne and Earth appear to"follow" each other in their paths around the Sun.

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    They're called 3753 Cruithne and 2002 AA29, which are part of a larger population of asteroids known as Near-Earth Objects(NEOs).

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    Cruithne orbits the Sun in about 1 year but it takes 770 years for the series to complete a horseshoe-shaped movement around the Earth.

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    Cruithne, having a maximum near-Earth magnitude of +15.8, is fainter than Pluto and would require at least a 320-millimetre(12.5 in) reflecting telescope to be seen.

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    Although Cruithne's orbit is not thought to be stable over the long term, calculations by Wiegert and Innanen showed that it has probably been synchronized with Earth's orbit for a long time.

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