Online multi-parameter phase-curve fitting and application to a large corpus of asteroid photometric data

D. A. Oszkiewicz, K. Muinonen, E. Bowell, D. Trilling, A. Penttilä, T. Pieniluoma, L. H. Wasserman, M. T. Enga

Research output: Contribution to journalArticle

40 Scopus citations

Abstract

We apply the new H,G12 and H,G1,G2 phase functions to a large corpus of asteroid photometric data. We make use of low-precision (generally rounded to 0.1mag) and low-accuracy (rms magnitude uncertainties of ±0.2-0.3mag) data obtained from the Minor Planet Center and modified at Lowell Observatory. We find (1) a correlation between G1,G2 values derived for asteroid families and albedos; (2) G12 homogeneity in families. In addition, we make available an online Java applet (titled Asteroid Phase Function Analyzer). The applet may be used to compute asteroid absolute magnitudes and slope parameters using three different phase functions: the H,G, H,G1,G2, and H,G12. The tool also includes non-Gaussian error analysis using Monte Carlo methods. The applet is available at http://asteroid.astro.helsinki.fi/astphase/.

Original languageEnglish (US)
Pages (from-to)1919-1929
Number of pages11
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume112
Issue number11
DOIs
StatePublished - Jul 1 2011

Keywords

  • Absolute magnitude
  • Asteroids
  • Java applet
  • Phase angle
  • Phase curve
  • Phase function

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

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