Deep Impact observations by OSIRIS onboard the Rosetta spacecraft |
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| Authors: | Keller Horst Uwe Jorda Laurent Küppers Michael Gutierrez Pedro J Hviid Stubbe F Knollenberg Jörg Lara Luisa-Maria Sierks Holger Barbieri Cesare Lamy Philippe Rickman Hans Rodrigo Rafael |
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| Institution: | Max-Planck Institut für Sonnensystemforschung, Max-Planck-Strasse 2, 37191 Katlenburg-Lindau, Germany. keller@mps.mpg.de |
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| Abstract: | The OSIRIS cameras (optical, spectroscopic, and infrared remote imaging system) onboard the European Space Agency's Rosetta spacecraft observed comet 9P/Tempel 1 for 17 days continuously around the time of NASA's Deep Impact mission. The cyanide-to-water production ratio was slightly enhanced in the impact cloud, compared with that of normal comet activity. Dust particles were flowing outward in the coma at >160 meters per second, accelerated by the gas. The slope of the brightness increase showed a dip about 200 seconds after the impact. Dust Afrho values before and long after the impact confirm the slight decrease of cometary activity. The dust-to-water mass ratio was much larger than 1. |
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