Deep Impact Observations by OSIRIS Onboard the Rosetta Spacecraft
- 14 October 2005
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 310 (5746), 281-283
- https://doi.org/10.1126/science.1119020
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 Afρ 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.Keywords
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