Volume 414, Number 2, February I 2004
|Page(s)||L21 - L24|
|Published online||19 January 2004|
Letter to the Editor
Detectability of YORP rotational slowing of asteroid 25143 Itokawa
Institute of Astronomy, Charles University, V Holešovičkách 2, 180 00 Prague 8, Czech Republic e-mail: firstname.lastname@example.org, email@example.com
2 Rolf Nevanlinna Institute, University of Helsinki, PO Box 4, 00014 Helsinki, Finland, and Sodankyla Geophysical Observatory, University of Oulu, Tahtelantie 62, 99600 Sodankyla, Finland e-mail: firstname.lastname@example.org
3 Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USA e-mail: email@example.com
Corresponding author: D. Vokrouhlický, firstname.lastname@example.org
Accepted: 11 December 2003
We predict that the YORP thermal-emission effect can be directly detected through a measurable increase in the rotation period of the several-hundred-meter near-Earth asteroid 25143 Itokawa. The fractional change of Itokawa's rotation rate in between 2001 and 2004 should be , significantly larger than its currently estimated uncertainty . The corresponding change of sidereal rotation phase, normalized to unity in a cycle, is in January 2004, producing h delay of lightcurve maximum.
Key words: solar system: minor planets, asteroids / radiations mechanisms: thermal
© ESO, 2004
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