Comets visited by spacecraft Comets visited by spacecraft Comet Borrelly (formally designated 19P/Borrelly) is a periodic comet, which was visited by the space craft Deep Space 1. ...more on Wikipedia about "19P/Borrelly"
(21P/Giacobini-Zinner) Comet Giacobini-Zinner was discovered by Michel Giacobini ( Nice, France) in Aquarius on December 20, 1900. It was recovered two passages later, by Ernst Zinner ( Bamberg, Germany) while observing variable stars near Beta Scuti on October 23, 1913. During its apparitions, the comet can reach about 8th magnitude, but druing the 1946 show, it underwent a series of outbursts that made it as bright as 5th magnitude. ...more on Wikipedia about "21P/Giacobini-Zinner"
Comet Grigg-Skjellerup (formally designated 26P/Grigg-Skjellerup) is a periodic comet. ...more on Wikipedia about "26P/Grigg-Skjellerup"
Comet Wild 2 (officially designated 81P/Wild) is a comet named after Swiss astronomer Paul Wild (pronounced Vilt), who discovered it in 1978. ...more on Wikipedia about "81P/Wild"
Comet Halley, officially designated 1P/Halley, more generally known as Halley's Comet after Edmond Halley, is a comet that can be seen every 75-76 years. ...more on Wikipedia about "Comet Halley"
Tempel 1 is a periodic comet (formally designated 9P/Tempel 1). It was discovered on April 3, 1867 by Ernst Wilhelm Leberecht Tempel, an astronomer working in Marseille. At the time of discovery, it approached perihelion once every 5.68 years (designations 9P/1867 G1 and 1867 II). It was subsequently observed in 1873 (9P/1873 G1, 1873 I, 1873a) and in 1879 (1879 III, 1879b). However, Tempel 1's orbit occasionally brings it sufficiently close to Jupiter to be altered and its orbital period consequently change. This event occurred in 1881 (closest approach to Jupiter of 0.55 AU), lengthening the orbital period to 6.5 years. Perihelion also changed, increasing by 50 million kilometres, rendering the comet far less visible from Earth. Photographic attempts during 1898 and 1905 failed to recover the comet, and astronomers surmised that it had disintegrated. ...more on Wikipedia about "Tempel 1"
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