Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...68..239l&link_type=abstract
Icarus (ISSN 0019-1035), vol. 68, Nov. 1986, p. 239-251. USAF-NASA-supported research.
Astronomy and Astrophysics
Astronomy
181
Asteroids, Astronomical Models, Ceres Asteroid, Thermal Radiation, Infrared Radiation, Light Curve, Magnitude, Asteroids, Thermal Properties, Models, Ceres, Pallas, Infrared, Data, Wavelengths, Earth-Based Observations, Parameters, Analysis, Diameters, Astronomy, Magnitude, Diameters, Comparisons, Beaming
Scientific paper
The authors present ground-based thermal infrared observations of asteroids 1 Ceres and 2 Pallas made over a period of 2 years. By analyzing these data in light of the recently determined occultation diameter of Ceres (933 - 945 km) and Pallas (538 km) and their known small-amplitude lightcurves, they have determined a new value for the infrared beaming parameter used in the "standard" thermal emission model for asteroids. The new value is significantly lower than that previously used, and when applied in the reduction of thermal infrared observations of other asteroids, should yield model diameters that are closer to actual diameters.
Brown Harvey R.
Feierberg M. A.
Gradie Jonathan C.
Lebofsky Larry A.
Matson Dennis L.
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