Volatiles on the Lunar Surface as Observed by the Deep Impact Spacecraft

Details Volatiles on the Lunar Surface as Observed by the Deep Impact Spacecraft Volatiles on the Lunar Surface as Observed by the Deep Impact Spacecraft

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.0205s&link_type=abstract

American Astronomical Society, DPS meeting #41, #2.05

Astronomy and Astrophysics

Astronomy

Scientific paper

During its extended mission (EPOXI) the Deep Impact spacecraft has routinely observed the Moon for calibration purposes, particularly for the near infrared spectrometer. Most recently (June 2009) we obtained two long-planned sets of observations, while the spacecraft viewed the northern polar regions. The synoptic perspective of these hemispheric data complements the high spatial resolution data from Moon Mineralogy Mapper (M3) on-board India's Chandrayaan-1 spacecraft (Pieters et al. this session). In addition, the 1-5 microns Deep Impact spectrometer extends the spectral range beyond M3, which, for example, allows for a more complete measurement and removal of the thermal emissions that affect lunar spectra at wavelengths as short as 2.2 microns. Deep Impact has confirmed the presence of volatiles discovered by M3 (see also Clark, this session) and extended their detection to all latitudes, including low abundances at the equator (seen in prior calibration data from December 2007). In addition, the June 2009 observations include two sets of data separated by one week, during which the Moon rotated 90 degrees (i.e., 1/4 lunar day). These data reveal a dynamic, thermally activated process consistent with the presence of surfical volatiles.

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