The size and thermal properties of the nucleus of Comet 22P/Kopff

Groussin, O.; Lamy, P.; Toth, I.; Kelley, M.; Fernandez, Y.; A'Hearn, M.; Campins, H.; Licandro, J.; Lisse, C.; Lowry, S.; Meech, K. and Snodgrass, C. (2009). The size and thermal properties of the nucleus of Comet 22P/Kopff. Icarus, 199(2) pp. 568–570.

DOI: https://doi.org/10.1016/j.icarus.2008.07.015

Abstract

We detected the nucleus of Comet 22P/Kopff at 4.87 AU from the Sun with the two IRS peak-up cameras of the Spitzer Space Telescope on April 19, 2007. Using the thermal model of [Groussin, O., and 15 colleagues, 2007. Icarus 187, 16–25], we derive a nucleus size of 1.89±0.16 km, in agreement with [Lamy, P., Toth, I., Jorda, L., Groussin, O., A'Hearn, M.F., Weaver, H.A., 2002. Icarus 156, 442–455], and a thermal inertia I ≪ 30 JK^-1m^-2s^-1/2.

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