NEAR's flyby of 253 Mathilde: Images of a C asteroid

被引：160

作者：

Veverka, J

Thomas, P

Harch, A

Clark, B

Bell, JF

Carcich, B

Joseph, J

Chapman, C

Merline, W

Robinson, M

Malin, M

McFadden, LA

Murchie, S

Hawkins, SE

Farquhar, R

Izenberg, N

Cheng, A

机构：

[1] SW RES INST,BOULDER,CO 80302

[2] NORTHWESTERN UNIV,DEPT GEOL SCI,EVANSTON,IL 60208

[3] MALIN SPACE SCI SYST,SAN DIEGO,CA 92191

[4] UNIV MARYLAND,DEPT ASTRON,COLLEGE PK,MD 20742

[5] JOHNS HOPKINS UNIV,APPL PHYS LAB,LAUREL,MD 20723

来源：

SCIENCE | 1997年 / 278卷 / 5346期

关键词：

D O I：

10.1126/science.278.5346.2109

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：

On 27 June 1997, the Near Earth Asteroid Rendezvous (NEAR) spacecraft flew within 1212 kilometers of asteroid 253 Mathilde. Mathilde is an irregular, heavily cratered body measuring 66 kilometers by 48 kilometers by 46 kilometers. The asteroid's surface is dark (estimated albedo between 0.035 and 0.050) and similar in color to some CM carbonaceous chondrites. No albedo or color variations were detected. The volume derived from the images and the mass from Doppler tracking of the spacecraft yield a mean density of 1.3 +/- 0.2 grams per cubic centimeter, about half that of CM chondrites, indicating a porous interior structure.

引用

页码：2109 / 2114

页数：6

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