Pre-Perihelion Observations of the International Rosetta Mission Target Comet 46P/WIRTANEN in Support of UV Spectrometer Design and

Details Pre-Perihelion Observations of the International Rosetta Mission Target Comet 46P/WIRTANEN in Support of UV Spectrometer Design and Pre-Perihelion Observations of the International Rosetta Mission Target Comet 46P/WIRTANEN in Support of UV Spectrometer Design and

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.7204s&link_type=abstract

HST Proposal ID #7204

Physics

Hst Proposal Id #7204 Solar System

Scientific paper

The ALICE Ultraviolet Spectrometer team for the International Rosetta mission(a collaboration between ESA and NASA) requests HST DD time to obtainobservations of the Rosetta Mission target, comet 46P/Wirtanen, as a part ofour instrument design activity. Our specific objectives are to:(i) characterize the variation in UV emissions (particularly, OH) withheliocentric distance in the critical 2-3 AU distance regime where Rosettawill rendezvous with the comet, and(ii) to obtain reflectance spectra of the nucleus, before the comet reaches 2.8AU and becomes very active, so that far-UV design requirements can be basedon data rather than supposition.We propose to use the FOS with grating G270H to meet these objectives. CometP/Wirtanen has never been observed in the UV, and will reach perihelion inCycle 6. This is the last perihelion before the launch of Rosetta in 2003. HSTis the only observatory capable of obtaining UV spectra of P/Wirtanen.

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