出典:Wikipedia
出典:『Wikipedia』 (2011/06/29 23:58 UTC 版)
6 Hebe (pronounced /ˈhiːbiː/ hee-bee, or as in Greek: ‘Ήβη) is a large main-belt asteroid, containing around half a percent of the mass of the belt. Its apparently high bulk density (greater than that of the Earth's Moon or even Mars), however, means that by volume it does not rank among the top twenty asteroids. This high bulk density suggests an extremely solid body that has not been impacted by collisions, which is not typical of asteroids of its size – they tend to be loosely bound rubble piles.