RECTIFIED ASTEROID ALBEDOS AND DIAMETERS FROM IRAS AND MSX PHOTOMETRY CATALOGS
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 radar-derived parameters. The NEATM approach produces a more robust estimate of albedos and diameters, yielding albedos of p{sub v} (NEATM mean) =0.081 {+-} 0.064. The asteroid beaming parameter ({eta}) for the selected asteroids has a mean value of 1.07 {+-} 0.27, and the smooth distribution of {eta} suggests that this parameter is independent of asteroid properties such as composition. No trends in {eta} due to size-dependent rotation rates are evident. Comparison of derived values of {eta} as a function of taxonomic 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.
- OSTI ID:
- 21443230
- Journal Information:
- Astronomical Journal (New York, N.Y. Online), Vol. 140, Issue 4; Other Information: DOI: 10.1088/0004-6256/140/4/933; ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
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