Ground--based Thermal Infrared Imaging Observations of Jupiter During the Galileo Spacecraft's First Orbit

Details Ground--based Thermal Infrared Imaging Observations of Jupiter During the Galileo Spacecraft's First Orbit Ground--based Thermal Infrared Imaging Observations of Jupiter During the Galileo Spacecraft's First Orbit

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.2206f&link_type=abstract

American Astronomical Society, DPS meeting #28, #22.06; Bulletin of the American Astronomical Society, Vol. 28, p.1142

Astronomy and Astrophysics

Astronomy

Scientific paper

We observed Jupiter at ten wavelengths from 7.85 mu m to 24.5 mu m during the Galileo spacecraft's first orbit (G1 encounter), June 26--July 1, 1996 from the NASA Infrared Telescope Facility using the MIRLIN thermal infrared camera. At wavelengths sensitive to the ammonia (8.57 mu m to 13.20 mu m), the Great Red Spot (GRS) is very symmetrical and has a distinct bright southern boundary. The bright southern lip is ~ 2K warmer than the interior of the GRS. Wavelengths sensitive only to the temperature structure show a large warm area in the south tropical zone trailing the GRS. Contrasting this is a broad, cool area preceding and southwards of the GRS. The white ovals were seen as small cool spots at wavelengths as long as 17.93 mu m. Beyond 17.93 mu m the white ovals were not resolved because of telescope diffraction. The North Equatorial Belt shows considerable quasi-periodic longitudinal structure, structure is less evident in the South Equatorial Belt in amplitude and number of longitudinal peaks, although the GRS dominates a large range of longitudes. (1) NASA/NRC Resident Research Associate (2) 1996 Caltech Summer Undergraduate Research Fellow

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