A'Hearn M F, Belton M J S, Delamere W A, Kissel J, Klaasen K P, McFadden L A, Meech K J, Melosh H J, Schultz P H, Sunshine J M, Thomas P C, Veverka J, Yeomans D K, Baca M W, Busko I, Crockett C J, Collins S M, Desnoyer M, Eberhardy C A, Ernst C M, Farnham T L, Feaga L, Groussin O, Hampton D, Ipatov S I, Li J-Y, Lindler D, Lisse C M, Mastrodemos N, Owen W M, Richardson J E, Wellnitz D D, White R L
University of Maryland, College Park, MD 20742, USA.
Science. 2005 Oct 14;310(5746):258-64. doi: 10.1126/science.1118923. Epub 2005 Sep 8.
Deep Impact collided with comet Tempel 1, excavating a crater controlled by gravity. The comet's outer layer is composed of 1- to 100-micrometer fine particles with negligible strength (<65 pascals). Local gravitational field and average nucleus density (600 kilograms per cubic meter) are estimated from ejecta fallback. Initial ejecta were hot (>1000 kelvins). A large increase in organic material occurred during and after the event, with smaller changes in carbon dioxide relative to water. On approach, the spacecraft observed frequent natural outbursts, a mean radius of 3.0 +/- 0.1 kilometers, smooth and rough terrain, scarps, and impact craters. A thermal map indicates a surface in equilibrium with sunlight.
“深度撞击”号探测器与坦普尔1号彗星相撞，挖掘出一个受引力控制的撞击坑。该彗星的外层由直径1至100微米的细颗粒组成，强度可忽略不计（<65帕斯卡）。根据喷出物回落情况估算了局部引力场和彗核平均密度（每立方米600千克）。初始喷出物温度很高（>1000开尔文）。在撞击事件期间及之后，有机物质大幅增加，而二氧化碳与水的相对变化较小。在接近彗星时，航天器观测到频繁的自然喷发、平均半径为3.0 +/- 0.1千米、有光滑和粗糙地形、陡坡以及撞击坑。热图显示其表面与阳光处于平衡状态。
