Infrared observations of Comet 81P/Wild 2 in 1997

Details Infrared observations of Comet 81P/Wild 2 in 1997 Infrared observations of Comet 81P/Wild 2 in 1997

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icar..161..164h&link_type=abstract

Icarus, Volume 161, Issue 1, p. 164-173.

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Scientific paper

Comet 81P/Wild 2 was observed in the thermal infrared over 6 months during its 1997 perihelion passage. The comet was most active in late February, about 3 months preperihelion; dust production declined by a factor of 3 between February and August. For the GIOTTO Halley dust size distribution, maximum dust production rate was ~2 × 106 g/s. The comet displayed a 10-μm silicate feature about 25% above the continuum, similar to several other Jupiter-family comets, but much lower than that seen in a number of Oort cloud comets.
NASA's STARDUST sample return mission will encounter P/Wild 2 98 days postperihelion in January 2004. Based on our observations at a similar point in the orbit and the Halley size distribution, we predict that the mass fluence on the spacecraft for a 150 km miss distance will be about 8 × 10-6 g/cm2 for particles up to 1 cm in radius. The corresponding areal coverage will be about 10-4.

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