| 翻訳と辞書 |
| 1689 Floris-Jan ： ウィキペディア英語版 |
1689 Floris-Jan
1689 Floris-Jan, provisional designation 1930 SO, is a stony asteroid and a slow rotator from the inner regions of the asteroid belt, about 16 kilometers in diameter. It was discovered by Dutch astronomer Hendrik van Gent at the Leiden Southern Station, annex to the Johannesburg Observatory in South Africa on 16 September 1930.〔 It was independently discovered by Soviet astronomer Evgenii Skvortsov at the Crimean Simeiz Observatory five days later.〔
The asteroid orbits the Sun at a distance of 1.9–3.0 AU once every 3 years and 10 months (1,400 days). Its orbit is tilted by 6 degrees to the plane of the ecliptic and shows a relatively high eccentricity of 0.21.〔 According to the surveys carried out by the Akari, WISE and NEOWISE missions, the geometric albedo of the S-type asteroid lies in the range of 0.13–0.18.〔〔〔〔
Light-curve observations from the 1980s already revealed that the asteroid was a very slow rotator with a rotation period of 145 hours. At the time, the six-day period was a new record among slowly rotating asteroids ever measured.〔〔〔 It was also assumed that it might be a tumbling asteroid with a non-principal axis rotation.〔〔
The asteroid was named after Floris-Jan van der Meulen, the 5,000th visitor to a 14-day astronomical exhibition at the Leiden Observatory.〔
== References ==
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「1689 Floris-Jan」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.
|
|