Nucleus and Dust Coma of Comet 2P/Encke

Details Nucleus and Dust Coma of Comet 2P/Encke Nucleus and Dust Coma of Comet 2P/Encke

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998dps....30.4206f&link_type=abstract

American Astronomical Society, DPS meeting #30, #42.06; Bulletin of the American Astronomical Society, Vol. 30, p.1095

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on our analyses of mid- and far-IR imaging of comet 2P/Encke during its 57th recorded apparition. The comet passed only 0.19 AU from Earth on 4 July 1997, allowing us to obtain high-resolution imaging for the purposes of studying the nucleus and inner coma. Rarely is it possible to study these aspects of a comet in such detail at these wavelengths; indeed the comet had never before been imaged with such sophisticated infrared detectors at such a close distance. We observed the comet between 14 and 22 July with the TIMMI instrument on the ESO 3.6-m telescope and with the ISOPHOT instrument on the ISO spacecraft. We will emphasize our determination of the thermophysical properties of the nucleus -- size, rotation rate, temperature -- but we will also touch on characteristics of the dust coma. We will also place our results in context of previous studies of this comet.

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