Titan : Huygens Probe Entry Fireball and UV Seasonal Change

Details Titan : Huygens Probe Entry Fireball and UV Seasonal Change Titan : Huygens Probe Entry Fireball and UV Seasonal Change

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10270l&link_type=abstract

HST Proposal ID #10270

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Hst Proposal Id #10270 Solar System

Scientific paper

We plan a single-orbit observation of Titan to observe the 387nm CN emission associated with the entry fireball of the ESA Huygens probe into Titan's methane-rich nitrogen atmosphere. The observation may confirm the entry time of the probe, and provide constraints on the nonthermal emission from the shock layer and wake for an entry body of known ballistic parameters to aid aerothermodynamic models to aid meteoric studies and future heat shield designs. Whether the entry is detected or not, the observation also yields a north-south spectral profile to diagnose the continuing seasonal change on Titan, namely the north-south seasonal asymmetry, and the disappearing UV-dark south polar hood. Near-IR STIS Spectra, nominally before and after the probe entry, will constrain the stratospheric and tropospheric haze and cloud structure, for future comparison with probe data, as well as indicate any changes during the entry.

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