Rectified asteroid albedos and diameters from IRAS and MSX photometry catalogs

L. E.E. Erin Ryan, Chick E Woodward

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Rectified diameters and albedo estimates of 1517 main-belt asteroids selected from IRAS and the Mid-Course Space Experiment asteroid photometry catalogs are derived from updated infrared thermal models, the Standard Thermal Model and the Near-Earth Asteroid Thermal Model (NEATM), and Monte Carlo simulations, using new Minor Planet Center compilations of absolute magnitudes (H values) constrained by occultation- and radarderived parameters. The NEATM approach produces a more robust estimate of albedos and diameters, yielding albedos of pv (NEATM mean) = 0.081 ± 0.064. The asteroid beaming parameter (η) for the selected asteroids has a mean value of 1.07 ± 0.27, and the smooth distribution of η suggests that this parameter is independent of asteroid properties such as composition. No trends in η due to size-dependent rotation rates are evident. Comparison of derived values of η as a function of taxonomie type indicates that the beaming parameter values for S- and C-type asteroids are identical within the standard deviation of the population of beaming parameters.

Original languageEnglish (US)
Pages (from-to)933-943
Number of pages11
JournalAstronomical Journal
Issue number4
StatePublished - Oct 2010


  • Asteroids
  • General - Surveys
  • Minor planets


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