Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8135949 | Icarus | 2015 | 14 Pages |
Abstract
We present the results of a Monte Carlo technique to calculate the absolute magnitudes (H) and slope parameters (G) of â¼240,000 asteroids observed by the Pan-STARRS1 telescope during the first 15 months of its 3-year all-sky survey mission. The system's exquisite photometry with photometric errors â²0.04mag, and well-defined filter and photometric system, allowed us to derive accurate H and G even with a limited number of observations and restricted range in phase angles. Our Monte Carlo method simulates each asteroid's rotation period, amplitude and color to derive the most-likely H and G, but its major advantage is in estimating realistic statistical + systematic uncertainties and errors on each parameter. The method was tested by comparison with the well-established and accurate results for about 500 asteroids provided by Pravec et al. (Pravec, P. et al. [2012]. Icarus 221, 365-387) and then applied to determining H and G for the Pan-STARRS1 asteroids using both the Muinonen et al. (Muinonen, K. et al. [2010]. Icarus 209, 542-555) and Bowell et al. (Bowell, E. et al. [1989]. Asteroids III, Chapter Application of Photometric Models to Asteroids. University of Arizona Press, pp. 524-555) phase functions. Our results confirm the bias in MPC photometry discovered by JuriÄ et al. (JuriÄ, M. et al. [2002]. Astrophys. J. 124, 1776-1787).
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Space and Planetary Science
Authors
Peter Vereš, Robert Jedicke, Alan Fitzsimmons, Larry Denneau, Mikael Granvik, Bryce Bolin, Serge Chastel, Richard J. Wainscoat, William S. Burgett, Kenneth C. Chambers, Heather Flewelling, Nick Kaiser, Eugen A. Magnier, Jeff S. Morgan, Paul A. Price,