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・ Comet de Vico
・ Comet Donati
・ Comet dust
・ Comet Encke
・ Comet Express
・ Comet Falls
・ Comet Gain
・ Comet Galaxy
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・ Comet Group
・ Comet grouper
・ Comet Hale–Bopp
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Comet Humason
・ Comet Hyakutake
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・ Comet in Moominland
・ Comet in Moominland (film)
・ Comet IRAS–Araki–Alcock
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Comet Humason : ウィキペディア英語版
Comet Humason
:''There is another long-period comet named Humason: C/1960 M1 (a.k.a. 1959 X, 1960e).''
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Comet Humason, formally designated C/1961 R1 (a.k.a. 1962 VIII and 1961e), was a non-periodic comet discovered by Milton L. Humason on September 1, 1961. Its perihelion was well beyond the orbit of Mars, at 2.133 AU. Its period is 2940 years, and the diameter of its nucleus estimated at about 41 km.
It was a 'giant' comet, much more active than a normal comet for its distance to the Sun, with an absolute magnitude of +1.5, a hundred times brighter than an average new comet. It had an unusually disrupted or 'turbulent' appearance.〔Brandt & Chapman, ''Introduction to Comets'', Cambridge University Press, 2004, p.156〕 It was also unusual in that the spectrum of its tail showed a strong predominance of the ion CO+, a result previously seen unambiguously only in Comet Morehouse (C/1908 R1).〔Huebner, W. ''Physics and chemistry of comets'', Springer-Verlag, 1990, p.246〕
== References ==

* (''News And Comments — Comets: Comet Humason 1961e' ), Irish Astronomical Journal, Vol. 6, p. 191 (1964)


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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