Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - preliminary results

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, John L. Tonry, Christopher Waters

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Abstract

We present the results of a Monte Carlo technique to calculate the absolute magnitudes (H) and slope parameters (G) of about 240,000 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 asteroids 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 confirmed by comparison with the well-established and accurate results for about 500 asteroids provided by Pravec et al. (2012) and then applied to determining H and G for the Pan-STARRS1 asteroids using both the Muinonen et al. (2010) and Bowell et al. (1989) phase functions. Our results confirm the bias in MPC photometry discovered by ( Jurić et al., 2002).
Original languageEnglish
Pages (from-to)34-47
Number of pages14
JournalIcarus
Volume261
Early online date13 Aug 2015
DOIs
Publication statusPublished - 15 Nov 2015

Bibliographical note

13 figures, 7 tables

Keywords

  • astro-ph.EP

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    Vereš, P., Jedicke, R., Fitzsimmons, A., Denneau, L., Granvik, M., Bolin, B., Chastel, S., Wainscoat, R. J., Burgett, W. S., Chambers, K. C., Flewelling, H., Kaiser, N., Magnier, E. A., Morgan, J. S., Price, P. A., Tonry, J. L., & Waters, C. (2015). Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - preliminary results. Icarus, 261, 34-47. https://doi.org/10.1016/j.icarus.2015.08.007