Detectability of YORP rotational slowing of asteroid 25143 Itokawa

Details Detectability of YORP rotational slowing of asteroid 25143 Itokawa Detectability of YORP rotational slowing of asteroid 25143 Itokawa

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...414l..21v&link_type=abstract

Astronomy and Astrophysics, v.414, p.L21-L24 (2004)

Astronomy and Astrophysics

Astrophysics

15

Solar System: Minor Planets, Asteroids, Radiations Mechanisms: Thermal

Scientific paper

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 (1-2)× 10-4, significantly larger than its currently estimated uncertainty ≃ 5× 10-5. The corresponding change of sidereal rotation phase, normalized to unity in a cycle, is ≃ (0.09-0.25) in January 2004, producing ≃ (1-3) h delay of lightcurve maximum.

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