Size determination of the Centaur Chariklo from millimeter-wavelength bolometer observations
W. J. Altenhoff, K. M. Menten, F. Bertoldi
Abstract
Using the Max-Planck Millimeter Bolometer Array (MAMBO) at the IRAM 30m telescope we detected emission at 250 GHz from the Centaur Chariklo (1997 CU26). The observed continuum flux density implies a photometric diameter of 273 km. The resulting geometric albedo is 0.055, somewhat higher than expected from a comparison with most of the other few Centaurs and cometary nuclei for which such data are available.
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