1P/Halley

作者：FarGetaNik Greg Frieger SpaceExplorer

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Halley's Comet (1P/Halley) is a famous periodic comet that is visible from Earth every 74 to 79 years. Known since the ancient times, its nature as a comet wasn't discovered until Sir Edmund Halley calculated its orbit in 1705. Its last perihelion occurred in 1986, and in that year it was visited by five spacecraft simultaneously (Giotto, Vega 1/2, Sakigake and Suisei). Its next return won't occur until 2061.

Halley's trajectory (1600-2500). Its orbit is subject to planetary perturbations, such as those from Jupiter and Saturn

Halley's Comet photographed by W. Litler on Easter Island, 1986-Mar-8

The nucleus of 1P/Halley as seen by the Giotto spacecraft, 1986-Mar-14

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