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DOI: 10.1126/science.1119020

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Science 310 (2005) 281K

Deep Impact Observations by OSIRIS Onboard the Rosetta Spacecraft

H.U Keller, L. Jorda 1, M. Küppers, P. J. Gutierrez, S. F. Hviid, J. Knollenberg, L.-M. Lara, H. Sierks, C. Barbieri, P. Lamy 1, H. Rickman, R. Rodrigo

(2005)

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.

1:	Laboratoire d'Astrophysique de Marseille (LAM)
	CNRS : UMR6110 – INSU – Université de Provence - Aix-Marseille I

Subject

:

Sciences of the Universe/Astrophysics Physics/Astrophysics/Cosmology and Extra-Galactic Astrophysics

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From: Catherine Beaussier <>

Submitted on: Monday, 23 January 2006 09:17:11

Updated on: Monday, 23 January 2006 09:17:11