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Psyche (spacecraft)
''Psyche'' is a proposed orbiter mission concept by NASA to explore the origin of planetary cores by studying the metallic asteroid 16 Psyche. This asteroid is the exposed iron core of a protoplanet, likely the remnant of a violent collision with another object that stripped off the outer crust.
16 Psyche is the heaviest known M-type asteroid, and heaviest known Themistian asteroid. Radar observations of the asteroid from Earth indicate an iron-nickel composition.〔(33th Largest Asteroid, 16 Psyche )〕
==Overview==
''Psyche'' was selected on 30 September 2015 as one of five semifinalists for the Mission #13 of the Discovery Program. The winner will be chosen around September 2016, and must be ready to launch by the end of 2021. The ''Psyche'' spacecraft would use solar electric propulsion, and the notional payload would be an imager, a magnetometer, and a spectrometer.〔
The mission would launch in 2020 and arrive in 2026 for a year of science. Data shows 16 Psyche asteroid to have a diameter of about .〔(【引用サイトリンク】 title=JPL Small-Body Database Browser: 16 Psyche )〕 Linda Elkins-Tanton of Arizona State University in Tempe, Arizona is the Principal Investigator. NASA's Jet Propulsion Laboratory would manage the project.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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