Imaging of Comet 21P/Giacobini-Zinner

Details Imaging of Comet 21P/Giacobini-Zinner Imaging of Comet 21P/Giacobini-Zinner

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..420..103p&link_type=abstract

Bioastronomy 2007: Molecules, Microbes and Extraterrestrial Life ASP Conference Series, Vol. 420, proceedings of a workshop held

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on ground-based optical and space infrared observations of comet 21P/Giacobini-Zinner. Our data indicate that the comet is quite active with fairly uniform coma emission out to R ˜ 3.8 AU, absent large numbers of jets or other coma features. Dust production measurements combined with no visibly detected extended coma emission suggest that comet activity turned off ˜ 3.8 AU post-perihelion. The color of the coma is slightly redder than the Sun, and no variations in the light curve of 21P were evident. The 24 micron Spitzer image shows a strong dust coma and tail, but no evidence for a dust trail, even though this comet is the parent body of the Draconid meteor stream.

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