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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク NEAR Shoemaker ： ウィキペディア英語版 NEAR Shoemaker The Near Earth Asteroid Rendezvous - Shoemaker (NEAR Shoemaker), renamed after its 1996 launch in honor of planetary scientist Eugene Shoemaker, was a robotic space probe designed by the Johns Hopkins University Applied Physics Laboratory for NASA to study the near-Earth asteroid Eros from close orbit over a period of a year. The mission succeeded in closing in with the asteroid and orbited it several times, finally terminating by touching down on the asteroid on 12 February 2001. The primary scientific objective of NEAR was to return data on the bulk properties, composition, mineralogy, morphology, internal mass distribution and magnetic field of Eros. Secondary objectives include studies of regolith properties, interactions with the solar wind, possible current activity as indicated by dust or gas, and the asteroid spin state. This data will be used to help understand the characteristics of asteroids in general, their relationship to meteoroids and comets, and the conditions in the early Solar System. To accomplish these goals, the spacecraft was equipped with an X-ray/gamma ray spectrometer, a near-infrared imaging spectrograph, a multi-spectral camera fitted with a CCD imaging detector, a laser rangefinder, and a magnetometer. A radio science experiment was also performed using the NEAR tracking system to estimate the gravity field of the asteroid. The total mass of the instruments was 56 kg, and they required 80 W power. ==Development== A previous plan for the mission was for it to go to 4660 Nereus and do a flyby of 2019 Van Albada en route.〔 In January 2000 it would rendezvous with Nereus but instead of staying it would visit multiple asteroids and comets.〔 Some of the choices that were discussed were Encke's comet, 433 Eros (that became the mission's primary target), 1036 Ganymed, 4 Vesta, 4015 (1979 VA)〔 The Small-Body Grand Tour was a plan for visiting two asteroids and two comets over a span of a decade with the spacecraft.〔(Extended-mission opportunities for a Discovery-class asteroid rendezvous mission )〕 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「NEAR Shoemaker」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.