| 翻訳と辞書 |
| (85989) 1999 JD6 ： ウィキペディア英語版 |
(85989) 1999 JD6
is an Aten asteroid, near-Earth object, and potentially hazardous object in the inner Solar System that makes frequent close approaches to Earth and Venus. On the Earth approach in 2015, it was observed by the Goldstone Solar System Radar and found to be a contact binary with the largest axis approximately 2 kilometers wide, and each lobe about 200–300 meters large. Although in its current orbit never passes closer than 0.047 AU to Earth, it is listed as a potentially hazardous object because it is large and might pose a threat in the future.
The asteroid is well-observed, having been observed over 2,000 times over a length of over 25 years, and was assigned a numeric designation in August 2004.
==July 2015 Earth passage==
On 24 July 2015 came as close as 19 lunar distances to Earth.〔http://photojournal.jpl.nasa.gov/catalog/PIA19647 PIA19647]〕 It was imaged by radar, and shown to be a contact binary, about 2 kilometers (1.2 miles) on its long axis.〔(PIA19647 )〕
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「(85989) 1999 JD6」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.
|
|