Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21730607m&link_type=abstract
American Astronomical Society, AAS Meeting #217, #306.07; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
The Deep Impact Extended mission (DIXI) is part of the EPOXI mission and will rendezvous with the comet 103P/Hartley 2 on 4 Nov. 2010 at 13:50 UT. Many of the anticipated key science results will come from the combined interpretation of the in-situ spacecraft data and the Earth- and space-based observing campaigns. DIXI in-situ objectives include characterizing the nucleus properties, understanding the activity (outbursts, and sources), mapping the surface and correlating surface albedo, color and temperature with topography to understand the thermal properties of the surface. The Earth-based observations provide a longer-term context for the in-situ observations, and will characterize the activity levels leading up to the encounter, including assessing the dust environment and volatile species production rates. Earth-based observations will search for outbursts and jets that might be linked to activity. The international observing campaign scheduled at more than 20 observatories, began in March 2010, and will continue beyond January 2011, although selected observations began in 2008 with the recovery of the nucleus (Snodgrass et al., (2010), A&A, 516L) and Spitzer IR observations (Lisse et al., (2009) PASP 121, 968), and in 2009 with the measurement of the rotational light curve. We will report on Earth-based observing highlights and their synergies with the in-situ observations. With these combined data we can not only better understand comet Hartley 2, but through the legacy of telescopic observations we may also better understand comets as a whole.
A'Hearn Michael F.
DIXI Observing Team
Kelley Michael S.
Meech Karen Jean
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