ASTEROID RADAR ASTROMETRY

被引：52

作者：

OSTRO, SJ

CAMPBELL, DB

CHANDLER, JF

SHAPIRO, II

HINE, AA

VELEZ, R

JURGENS, RF

ROSEMA, KD

WINKLER, R

YEOMANS, DK

机构：

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

[2] HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA

[3] NATL ASTRON & IONOSPHERE CTR, ARECIBO, PR 00613 USA

来源：

ASTRONOMICAL JOURNAL | 1991年 / 102卷 / 04期

关键词：

D O I：

10.1086/115975

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report all useful measurements of time delay and Doppler frequency for asteroid radar echoes obtained at Arecibo and Goldstone during 1980-1990. New radar astrometry is presented for 23 near-Earth asteroids and three mainbelt asteroids. These measurements, which are orthogonal to optical, angular-position measurements, and typically have a fractional precision between 10(-5) and 10(-8), permit significant improvement in estimates of orbits and hence in the accuracy of prediction ephemerides. We also report estimates of radar cross section and circular polarization ratio for all asteroids observed astrometrically during 1980-1990.

引用

页码：1490 / 1502

页数：13

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