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161P/Hartley–IRAS
Periodic comet with 21 year orbit From Wikipedia, the free encyclopedia
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161P/Hartley–IRAS is a periodic comet with an orbital period of 21 years. It fits the classical definition of a Halley-type comet with (20 years < period < 200 years).[6]
This was one of six comets discovered by the infrared space telescope IRAS, in 1983.[7][8]
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