翻訳と辞書 Words near each other ・ 1998–99 EHF Women's Champions League ・ 1998–99 EHF Women's Cup Winners' Cup ・ 1998–99 Ekstraklasa ・ 1998–99 Eliteserien season ・ 1998–99 Elitserien season ・ 1998–99 English Premiership (rugby union) ・ 1998 World Weightlifting Championships – Women's 69 kg ・ 1998 World Weightlifting Championships – Women's 75 kg ・ 1998 World Wrestling Championships ・ 1998 World Youth Games ・ 1998 World's Strongest Man ・ 1998 WTA German Open ・ 1998 WTA German Open – Doubles ・ 1998 WTA German Open – Singles ・ 1998 WTA Tour ・ 1998 WW31 ・ 1998 Yokohama Flügels season ・ 1998 Yokohama Marinos season ・ 1998 Young Critics Circle Awards ・ 1998 Úrvalsdeild ・ 1998-99 Scottish Inter-District Championship ・ 19980 Barrysimon ・ 19981 Bialystock ・ 19982 Barbaradoore ・ 1998–1999 Allied Dunbar Premiership Two ・ 1998–2002 Argentine great depression ・ 1998–99 1. FC Kaiserslautern season ・ 1998–99 1.Lig ・ 1998–99 2. Bundesliga ・ 1998–99 A Group Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク 1998 WW31 ： ウィキペディア英語版 1998 WW31 (also written 1998 WW31) is a double Kuiper belt object. It was discovered in 1998 by the Deep Ecliptic Survey (DES). forms a binary system with another object with the IAU provisional designation : the first trans-Neptunian binary to be discovered since Pluto, and one of the most symmetrical binaries known in the Solar System. The two bodies are very close in size, with a diameter ratio of 1.2 and a mass ratio of 1.74, assuming similar surfaces and densities. Their orbital period is approximately 570 days, and they orbit at a distance of approximately 4000 km (closest approach) to 40,000 km, with a semi-major axis of about 22,000 km. Their diameters are likely to be in the 100–150 km range, assuming a density of 1–2 g/cm³. Their combined mass is 1/6000th that of the Pluto–Charon system. ==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「1998 WW31」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.