Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.2829s&link_type=abstract
American Astronomical Society, DPS meeting #40, #28.29; Bulletin of the American Astronomical Society, Vol. 40, p.442
Astronomy and Astrophysics
Astronomy
Scientific paper
On its way to rendezvous with comet 67P/Churyumov-Gerasimenko two close fly-bys have been arranged for the Rosetta spacecraft; at main belt asteroids (2867) Steins and (21) Lutetia. The fly-by at the first asteroid target, (2867) Steins, was scheduled for 8 August 2008 to 3 October 2008, with closest approach on 5 September 2008. The fly-by took place on the sun side of the asteroid with a relative velocity of 8.62 km/s. The selected fly-by strategy allowed continuous pointing on the asteroid before, during and after closest approach as well as passing through phase angle zero. Altogether 15 instruments were switched on to provide us with spatially resolved multi-wavelength observations of the asteroid itself as well as of its dust, plasma, magnetic and radiation environment. To date, six asteroids were encountered by spacecraft, four S-type, one V-type and one C-type asteroid. (2867) Steins is the first E-type asteroid visited by a space mission. Its detailed characterization will add to the understanding of the different types of asteroids existing and add to solving the puzzle of how the solar system formed and evolved. A summary of Rosetta fly-by at (2867) Steins will be presented.
Accomazzo Andrea
Küppers Michael
Schulz Robert
Schwehm Gerhard
Wirth K.
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