The SDSS Moving Object Catalog, Asteroid Data Release 4

Details The SDSS Moving Object Catalog, Asteroid Data Release 4 The SDSS Moving Object Catalog, Asteroid Data Release 4

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.5605j&link_type=abstract

American Astronomical Society, AAS Meeting #211, #56.05; Bulletin of the American Astronomical Society, Vol. 39, p.828

Astronomy and Astrophysics

Astronomy

2

Scientific paper

The Sloan Digital Sky Survey has significantly contributed to solar system science by producing the largest available catalog of multi-color photometric measurements for asteroids (SDSS Moving Objects Catalog, Asteroid Data Release 1; Ivezic et al. 2002).
The fourth release, to be released shortly, will contain over 470000 5-color u,g,r,i,z band observations of moving objects, 215000 of which were matched to 100000 known asteroids, an 8-fold increase over the original SDSSMOC ADR1. Highlights of SDSSMOC ADR4 include improved matching, observations of over 100 NEOs allowing for studies of their taxonomic properties, and 481 asteroid with 15 or more observations (with 66 having 20 or more) allowing for construction of light-curves and attempts at reconstruction of their shapes.
Results derived from SDSSMOC include:
1) Measurement of the main-belt asteroid size distribution to a significantly smaller size limit (< 1 km) than possible before. The size distribution resembles a broken power-law, independent of the heliocentric distance (Ivezic et al. 2001; Juric et al. 2002)
2) A smaller number of asteroids compared to previous work. In particular, the number of asteroids with diameters larger than 1 km is about 750,000 (Ivezic et al. 2001; Juric et al. 2002)
3) Asteroid dynamical families, defined as clusters in orbital parameter space, also strongly segregate in color space. Their distinctive optical colors support earlier suggestions that asteroids belonging to a particular family have a common origin (Ivezic et al. 2002; Parker et al. 2007).
4) Asteroid colors depend on their family's age, presumably due to space weathering (Jedicke et al. 2004; Nesvorny et al. 2005)
5) There are significantly more Jovian Trojan asteroids in the leading swarm (L4) than in the trailing swarm, and their color is correlated with their orbital inclination (Szabo et al. 2007)
SDSSMOC ADR4 will be made available at http://www.sdss.org/dr6/products/value_added/

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