Asteroid Lightcurve Photometry at the Palmer Divide Observatory

Details Asteroid Lightcurve Photometry at the Palmer Divide Observatory Asteroid Lightcurve Photometry at the Palmer Divide Observatory

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.8905w&link_type=abstract

American Astronomical Society Meeting 210, #89.05; Bulletin of the American Astronomical Society, Vol. 39, p.202

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Scientific paper

The concentrated program on asteroid lightcurves at the Palmer Divide Observatory has produced more than 300 results published in the Minor Planet Bulletin, Icarus, Nature, and other publications. The Hungaria asteroids have received particular attention the past three years, with 81 lightcurves published. The Hungarias provide a unique opportunity to compare the characteristics of non planet-crossing inner main-belt asteroids against those of the NEA population. The results so far indicate a similarity in the distribution of rotation rates, with an excess of both slow and fast rotators, as well as binary population (5 Hungaria binaries have been discovered at PDO). This suggests that both spin rate evolution and binary formation are not closely related to tidal interactions with major planets, but instead are likely the result of processes present in both main-belt and planet-crossing populations. A recently implemented and concurrent program will determine the absolute magnitudes (H/G) and V-R color index for a large number of brighter main-belt and near-Earth Asteroids. The motivation for this is the fact that current asteroid surveys obtain only very crude magnitudes of the objects discovered, so the greatest uncertainty in size frequency distribution of asteroids, and NEAs in particular, is in the determination of absolute magnitudes. The extended goal is to do statistical studies relating taxonomic class, phase, and other characteristics to lightcurve periods and amplitudes.
Work at the Palmer Divide Observatory is funded by NSF grant AST-0607505 and NASA grants NNX 06AB30G and NNG 06GI32G. The H/G project is funded in part by a Gene Shoemaker NEO Grant from the Planetary Society.

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