ASTEROID-1986DA - RADAR EVIDENCE FOR A METALLIC COMPOSITION

被引：70

作者：

OSTRO, SJ

CAMPBELL, DB

CHANDLER, JF

HINE, AA

HUDSON, RS

ROSEMA, KD

SHAPIRO, II

机构：

[1] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138

[2] NATL ASTRON & IONOSPHERE CTR,ARECIBO,PR 00613

[3] WASHINGTON STATE UNIV,DEPT ELECT & COMP ENGN,PULLMAN,WA 99164

[4] CORNELL UNIV,NATL ASTRON & IONOSPHERE CTR,ITHACA,NY 14853

来源：

SCIENCE | 1991年 / 252卷 / 5011期

关键词：

D O I：

10.1126/science.252.5011.1399

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Echoes from the near-Earth object 1986 DA show it to be significantly more reflective than other radar-detected asteroids. This result supports the hypothesis that 1986 DA is a piece of NiFe metal derived from the interior of a much larger object that melted, differentiated, cooled, and subsequently was disrupted in a catastrophic collision. This 2-kilometer asteroid, which appears smooth at centimeter to meter scales but extremely irregular at 10- to 100-meter scales, might be (or have been a part of) the parent body of some iron meteorites.

引用

页码：1399 / 1404

页数：6

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