Spin rate of asteroid (54509) 2000 PH5 increasing due to the YORP effect

被引：150

作者：

Taylor, Patrick A. ^{[1
]}

Margot, Jean-Luc

Vokrouhlicky, David

Scheeres, Daniel J.

Pravec, Petr

Lowry, Stephen C.

Fitzsimmons, Alan

Nolan, Michael C.

Ostro, Steven J.

Benner, Lance A. M.

Giorgini, Jon D.

Magri, Christopher

机构：

[1] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA

[2] Charles Univ Prague, Inst Astron, CR-18000 Prague 8, Czech Republic

[3] Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI 48109 USA

[4] Acad Sci Czech Republic, Astron Inst, CZ-25165 Ondrejov, Czech Republic

[5] Queens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland

[6] Arecibo Observ, Arecibo, PR 00612 USA

[7] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[8] Univ Maine, Farmington, ME USA

来源：

SCIENCE | 2007年 / 316卷 / 5822期

关键词：

D O I：

10.1126/science.1139038

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：

Radar and optical observations reveal that the continuous increase in the spin rate of near-Earth asteroid (54509) 2000 PH5 can be attributed to the Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect, a torque due to sunlight. The change in spin rate is in reasonable agreement with theoretical predictions for the YORP acceleration of a body with the radar-determined size, shape, and spin state of 2000 PH5. The detection of asteroid spin-up supports the YORP effect as an explanation for the anomalous distribution of spin rates for asteroids under 10 kilometers in diameter and as a binary formation mechanism.

引用

页码：274 / 277

页数：4