The Spitzer Asteroid Catalog: Albedos And Diameters of 35,000 Asteroids

Details The Spitzer Asteroid Catalog: Albedos And Diameters of 35,000 Asteroids The Spitzer Asteroid Catalog: Albedos And Diameters of 35,000 Asteroids

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.3515t&link_type=abstract

American Astronomical Society, DPS meeting #39, #35.15; Bulletin of the American Astronomical Society, Vol. 39, p.484

Astronomy and Astrophysics

Astronomy

Scientific paper

We are building the Spitzer Asteroid Catalog, a compilation of at least 35,000 independent measurements of asteroids that appear serendipitously in publicly available Spitzer archive data. Asteroids generally are detected at 8 and/or 24 microns, though the entire range of Spitzer wavelengths (3.6-160 microns) is probed. Our entire pipeline is fully automated. We consider only asteroids with small positional uncertainties. For each appearance of an asteroid in a Spitzer image, we measure the thermal flux and derive asteroid size and albedo. To date we have determined sizes and albedos for 1,000 asteroids, and should have 5,000-10,000 asteroids by the time of the DPS meeting. We will present this catalog and some brief analysis, including discussions of the small end of the asteroid size frequency distribution; composition gradients in the asteroid belt; and common properties among asteroid families. The final Spitzer Asteroid Catalog and its related products will be submitted both to scientific journals and to NASA's Planetary Data System. This work is based on archival data obtained with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by an award issued by NASA/JPL/Caltech.

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