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

被引：151
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.
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页码：274 / 277
页数：4
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