| 翻訳と辞書 |
2002 VE68
, also written 2002 VE68, is a temporary quasi-satellite of Venus.〔(Discovery of the first quasi-satellite of Venus (press announcement, Tuorla Observatory) )〕 It was the first quasi-satellite to be discovered around a major planet in the Solar System. In a frame of reference rotating with Venus, it appears to travel around it during one Venusian year but it actually orbits the Sun, not Venus.〔(Asteroid 2002 VE68, a quasi-satellite of Venus )〕
==Discovery, orbit and physical properties==
It was discovered on November 11, 2002 at Lowell Observatory. As of February 2013, has been observed telescopically 457 times with a data-arc span of 2,947 days and it was the target of Doppler observations in 5 occasions; therefore, its orbit is very well determined. Its semi-major axis (0.7237 AU) is very similar to that of Venus but its eccentricity is rather large (0.4104) and its orbital inclination is also significant (9.0060°). The spectrum of implies that it is an X-type asteroid and hence an albedo of about 0.25 should be assumed.〔 This combined with an absolute visual magnitude of 20.50 gives a diameter of about 200 m.〔(Physical characterization of 2002 VE68, a quasi-moon of Venus )〕 Its rotational period is 13.5 h and its light curve has an amplitude of 0.9 mag which hints at a very elongated body, perhaps a contact binary.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「2002 VE68」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|