Properties of 2060 Chiron from infrared ISOPHOT observations

Details Properties of 2060 Chiron from infrared ISOPHOT observations Properties of 2060 Chiron from infrared ISOPHOT observations

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000dps....32.2105g&link_type=abstract

American Astronomical Society, DPS Meeting #32, #21.05; Bulletin of the American Astronomical Society, Vol. 32, p.1031

Astronomy and Astrophysics

Astronomy

8

Scientific paper

We present the analysis of new observations of 2060 Chiron with the Infrared Space Observatory (ISO). They were performed with the ISO photometer (ISOPHOT) from 8 to 15 June 1996, when Chiron was near perihelion at a heliocentric distance of 8.46 AU, using four filters centered at 25, 60, 100 and 160 μ m. The observed fluxes are fitted to a thermal model which considers a mixture of water ice and refractory materials on the surface and includes heat conduction into the interior of the nucleus. We derive a thermal inertia of 10 JK-1m-2s-1/2. Combining the present IR data with visible observations by Luu (1990) and Marcialis (1993), we determine a radius of 80+/-10 km and a geometric albedo of 0.14+/-0.02.

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