Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.2504n&link_type=abstract
American Astronomical Society, DPS meeting #40, #25.04; Bulletin of the American Astronomical Society, Vol. 40, p.432
Astronomy and Astrophysics
Astronomy
3
Scientific paper
Introduction: Asteroid 2001 SN263 presented a good Arecibo radar observation opportunity in February 2008. Because of its fairly large size (absolute magnitude H=16.5, suggesting a diameter of 1-3 km) and relatively long time in the Arecibo sky while close to the Earth (16 days), we chose it for an extensive set of Arecibo radar observations to measure its shape and radar scattering properties.
Observations: The observations revealed the object to be a triple asteroid system. The orbital parameters are shown in the table. The larger satellite is not in tidally locked synchronous rotation. The density is determined using the shape shown in the presentation by T. Becker.
The near-infrared spectrum is slightly red, suggesting a primitive object. Analysis is continuing to determine the surface properties in more detail. The stability of the system and constraints on its formation will be discussed.
Becker Tracy Michelle
Giorgini Jon D.
Howell Ellen S.
Magri Christopher
Margot Jean-Luc
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