Physical Characterization of Asteroids in the Spitzer Taurus Legacy Survey

Details Physical Characterization of Asteroids in the Spitzer Taurus Legacy Survey Physical Characterization of Asteroids in the Spitzer Taurus Legacy Survey

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21340102r&link_type=abstract

American Astronomical Society, AAS Meeting #213, #401.02; Bulletin of the American Astronomical Society, Vol. 41, p.189

Astronomy and Astrophysics

Astronomy

Scientific paper

Statistical studies of the albedo and size populations of main belt asteroids have been limited in the past to asteroids with diameters > 10 km using the MSX and IRAS asteroid catalogs. To extend studies to asteroids with smaller diameters, one can now use the wealth of data in the Spitzer Space Telescope archive and examine the serendipitious observations of asteroids. We use multi epoch data from the IRAC and MIPS instruments in the Taurus Legacy programs to distinguish asteroids from background sources and match them to known asteroids. The sensitivity of the MIPS instrument paired with the Galactic background limits our detections at 24 micron to asteroids with diameters > 1 km, while the IRAC detection limit at 8 micron limits detections to asteroids with diameters > 0.4 km. We present analysis of the albedo properties of 1000 small main belt asteroids from the Taurus survey and our published MIPSGAL results, and the size frequency distribution based on combined visual and mid-IR data.
Support for this work provided in part by NASA through contracts 1263741, 1256406, and 1215746 issued by JPL/Caltech to the University of Minnesota, and the National Science Foundation grant AST-0706980.

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