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444 Gyptis
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444 Gyptis : ウィキペディア英語版
444 Gyptis

444 Gyptis is a main-belt asteroid that was discovered by J. Coggia on March 31, 1899, in Marseilles. It is classified as a C-type asteroid and is probably composed of carbonaceous material.
In 2004, Kochetova estimated Gyptis to have a mass of 1.25 kg with a high density of 5.53 g/cm³.〔 The adaptive optics instrument at the W. M. Keck Observatory showed an object with a diameter of 129 km, which is much smaller than the estimate of 160 km from the IRAS observatory measurements, indicating an irregular shape. The size ratio between the major and minor axes is estimated at 1.40.〔 Observations of an occultation on October 14, 2007, produced six chords indicating an cross-section ellipsoid of 179×150 km.〔 ((Chords) )〕
==References==


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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