Thermal Infrared Spectroscopy of the Leonid Meteor Parent Body, Comet Tempel-Tuttle

Details Thermal Infrared Spectroscopy of the Leonid Meteor Parent Body, Comet Tempel-Tuttle Thermal Infrared Spectroscopy of the Leonid Meteor Parent Body, Comet Tempel-Tuttle

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.8301l&link_type=abstract

American Astronomical Society, 192nd AAS Meeting, #83.01; Bulletin of the American Astronomical Society, Vol. 30, p.1156

Astronomy and Astrophysics

Astronomy

Scientific paper

We report 3 - 13 micron spectroscopyy of comet 55P/Tempel-Tuttle on Feb 8 and 9 1998 UT (roughly three weeks before perihelion) using the NASA Infrared Telescope Facility and The Aerospace Corporation Broadband Array Spectrograph System (BASS) with a 3.2 arc second diameter beam. The spectra on both nights were very similar (within the formal errors), suggesting little, if any, night-to-night variation. The spectra showed a relatively smooth continuum that was well-fit from 3 to 13 microns by a 330 K grey body. This is considerably higher than than the black body radiative equilibrium temperature of 273 K. Significant features (such as the crystalline olivine 11.3 micron feature seen in comet Hale-Bopp) were noticeably absent. This is only one of a very few comets that have exhibited this grey-body continuum type of spectral shape, and the implications of this shape (on particle size, composition, thermal history, for example) will be explored. Because the dust from this comet forms the Leonid meteors, its properties are of particular interest to the meteor and spacecraft communities.

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