Other
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1149h&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1149
Other
Scientific paper
The Deep Impact Flyby Spacecraft encountered comet 103P/Hartley 2 on November 4th, 2010 at a minimum distance of 694 km [1]. Both the High Resolution (HRI) and Medium Resolution Instruments (MRI) captured images of a field of debris enveloping the comet. Fine grain dust and ice (primarily detected in the HRI) and hundreds of discrete larger particles are apparent during encounter. The larger golf ball to basketball-sized particles are detected primarily near the nucleus (Fig. 1). This swarming of individual grains in the near-nucleus environment of Hartley 2 has not been observed in any other comet to date. The motion of the spacecraft instruments relative to the comet nucleus (including not only spacecraft velocity but pointing adjustments) provides sufficient parallax between successive images around closest approach to stereoscopically reconstruct the distance and displacement of these particles. In this study, we present an analysis of the identification, position, and motion of discrete ejected particles surrounding the comet.
A'Hearn Michael F.
Farnham Tony L.
Hermalyn Brendan
Kelley Michael S.
Lindler Don
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