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Rheasilvia
Rheasilvia is the most prominent surface feature on the asteroid Vesta and is believed to be an impact crater. It is in diameter, which is 90% the diameter of Vesta itself, and is 95% the mean diameter of Vesta, . However, the mean is affected by the crater itself. It is 89% the mean equatorial diameter of , making it one of the largest craters in the Solar System, and at 75°S latitude, covers most of the southern hemisphere. The peak in the center of the crater rises from its base,〔 the tallest mountain known in the Solar System. == Discovery == Rheasilvia was discovered in Hubble images in 1997,〔(Hubble Reveals Huge Crater on the Surface of the Asteroid Vesta )〕 but was not named until the arrival of the ''Dawn'' spacecraft in 2011. It is named after Rhea Silvia, a mythological vestal virgin and mother of the founders of Rome.〔(NASA coordinates)〕
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「Rheasilvia」の詳細全文を読む
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