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Spin Rate of Asteroid (54509) 2000 PH5 Increasing Due to the YORP Effect

by Benner, Lance A.M , Ostro, Steven J , Magri, Christopher , Lowry, Stephen C , Fitzsimmons, Alan , Scheeres, Daniel J , Taylor, Patrick A , Vokrouhlický, David , Pravec, Petr , Nolan, Michael C , Margot, Jean-Luc , Giorgini, Jon D

in Acceleration / Asteroids / Asteroids (minor planets) / Astronomy / Cosmology / Double stars / Earth, ocean, space / Exact sciences and technology / Light curves / Mass, size; gravitational fields; rotation; orbits / Modeling / Near Earth objects / Observational astronomy / Planetary, asteroid, and satellite characteristics and properties / Planets, their satellites and rings. Asteroids / prediction / Radar / Radar echoes / Radar tracking / Rotation / Signal bandwidth / solar radiation / Solar system / Theory / torque

2007

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Spin Rate of Asteroid (54509) 2000 PH5 Increasing Due to the YORP Effect

2007

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Spin Rate of Asteroid (54509) 2000 PH5 Increasing Due to the YORP Effect

2007

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Journal Article

Spin Rate of Asteroid (54509) 2000 PH5 Increasing Due to the YORP Effect

Benner, Lance A.M,

Ostro, Steven J,

Magri, Christopher,

Lowry, Stephen C,

Fitzsimmons, Alan,

Scheeres, Daniel J,

Taylor, Patrick A,

Vokrouhlický, David,

Pravec, Petr,

Nolan, Michael C,

Margot, Jean-Luc,

Giorgini, Jon D

2007

Overview

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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Publisher

American Association for the Advancement of Science,The American Association for the Advancement of Science

Subject

Acceleration

/ Asteroids

/ Asteroids (minor planets)

/ Astronomy

/ Cosmology

/ Double stars

/ Earth, ocean, space