Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.2804r&link_type=abstract
American Astronomical Society, DPS meeting #40, #28.04; Bulletin of the American Astronomical Society, Vol. 40, p.436
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 MIPSGAL and 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 these small main belt asteroids and the size frequency distribution based on combined visual and mid-IR data.
Carey Sean
MIPSGAL Science Team
Mizuno Daisuke
Ryan Erin L.
Woodward Charles E.
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