翻訳と辞書 Words near each other ・ Hirenarti ・ Hirendranath Mukherjee ・ Hirendranath Sadhu ・ Hirepadasalgi ・ Hirer Angti ・ Hires ・ Hires Big H ・ Hires Root Beer ・ Hiresindhogi ・ Hiretadashi ・ Hiretsukan ・ Hireulligeri ・ Hirevo ・ Hirayama ・ Hirayama (crater) ・ Hirayama family ・ Hirayama Gyozo ・ Hirayama Station ・ Hirayamaia ・ Hirayamajōshi-kōen Station ・ Hiraç Yagan ・ Hirbandh (community development block) ・ Hirbnafsah ・ Hirbnafsah Nahiyah ・ Hircocervus ・ Hirculops cornifer ・ Hird ・ Hird (disambiguation) ・ Hird (surname) ・ Hirden 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 Hirayama family ： ウィキペディア英語版 Hirayama family A Hirayama family of asteroids is a group of minor planets that share similar orbital elements, such as semimajor axis, eccentricity, and orbital inclination. The members of the families are thought to be fragments of past asteroid collisions. Strictly speaking, families and their membership are identified by analysing the so-called proper orbital elements rather than the current osculating orbital elements, which regularly fluctuate on timescales of tens of thousands of years. The ''proper elements'' are related constants of motion that are thought to remain almost constant for times of at least tens of millions of years. The Japanese astronomer Kiyotsugu Hirayama (1874–1943) pioneered the estimation of proper elements for asteroids, and first identified several of the most prominent families in 1918 (). Kiyotsugu Hirayama initially identified the Koronis, Eos, and Themis families, and later recognized also the Flora and Maria families. A list of the recognized families can be found here. 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「Hirayama family」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.