翻訳と辞書 Words near each other ・ P-SCH ・ P-selectin ・ P-selectin glycoprotein ligand-1 ・ P-series fuels ・ P-site ・ P-space ・ P-Square ・ P-Square discography ・ P-stable group ・ P-Star ・ P-TEFb ・ P-Toluenesulfonic acid ・ P-Toluic acid ・ P-town ・ P-type ・ P-type asteroid ・ P-type ATPase ・ P-type calcium channel ・ P-Unit ・ P-value ・ P-valve ・ P-Vine Records ・ P-wave ・ P-wave modulus ・ P-Xylene ・ P-Xylene (data page) ・ P-y method ・ P. ・ P. A. Antony ・ P. A. Ariyaratne 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 P-type asteroid ： ウィキペディア英語版 P-type asteroid P-type asteroids have low albedo and a featureless reddish spectrum. It has been suggested that they have a composition of organic rich silicates, carbon and anhydrous silicates, possibly with water ice in their interior. P-type asteroids are found in the outer asteroid belt and beyond. There are 33 P-type asteroids.〔 ==Taxonomy== An early system of asteroid taxonomy was established in 1975 from the doctoral thesis work of David J. Tholen. This was based upon observations of a group of 110 asteroids. The U-type classification was used as a miscellaneous class for asteroids with unusual spectra that didn't fit into the C and S-type asteroid classifications. In 1976, some of these U-type asteroids with unusual moderate albedo levels were labeled as M-type. Around 1981, an offshoot of the M-type asteroid branch appeared for minor planets that had a spectra that was indistinguishable from M-type, but they also had low albedo that did not lie within the M-type criteria. These were initially labeled X-type asteroids, then type DM (dark M) or PM (pseudo-M), before acquiring their own unique classification as P-type asteroids (where the P indicates "pseudo-M").〔 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「P-type asteroid」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.