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

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 wit...

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Bibliographic Details
Published in:Icarus (New York, N.Y. 1962) N.Y. 1962), 2009-02, Vol.199 (2), p.568-570
Main Authors: Groussin, O., Lamy, P., Toth, I., Kelley, M., Fernandez, Y., A'Hearn, M., Campins, H., Licandro, J., Lisse, C., Lowry, S., Meech, K., Snodgrass, C.
Format: Article
Language:English
Subjects:
Astronomy
Comets
Earth, ocean, space
Exact sciences and technology
nucleus
Solar system
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Summary: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   J K −1 m −2 s − 1 / 2 .
ISSN:0019-1035
1090-2643
DOI:10.1016/j.icarus.2008.07.015