Observations of the Occultation of nu_ {2} SGR by Jupiter

Details Observations of the Occultation of nu_ {2} SGR by Jupiter Observations of the Occultation of nu_ {2} SGR by Jupiter

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.2217d&link_type=abstract

American Astronomical Society, DPS meeting #28, #22.17; Bulletin of the American Astronomical Society, Vol. 28, p.1144

Astronomy and Astrophysics

Astronomy

Scientific paper

We successfully observed the occultation of the star nu_ {2} Sgr by Jupiter on 6 March, 1996 (UT) at three sites. Two sites were located close together at Lick Observatory while the third site, at Fremont Peak Observatory, was approximately 65 km distant. The event was observed with the 3-meter Shane telescope at a wavelength of 2 mu m, with the 0.9-meter Crossley reflector at 0.89 mu m, and with a portable 0.6-meter telescope at 0.89 mu m at Fremont Peak. The spatial resolution achieved was about 15 km for the infrared observation and 10 km for the two optical observations. The separation of the occultation events along Jupiter's limb was negligible for the two Lick observations but the Fremont Peak events were located 7.9 km from the Lick events along the limb for immersion and 30.7 km for emersion. The immersion and emersion events occurred at jovian latitudes of approximately 42deg N and 45deg N, respectively. The lightcurve inversions use the Galileo Probe thermal profile (obtained at a jovian latitude of 6.57deg N) as a high-altitude initial condition. Even if the probe's profile is somewhat different from the actual profile above the occultation level, it will still allow reliable temperatures to be derived over a wider range of altitude than would otherwise be possible. The two Lick datasets will be compared to the Fremont Peak observation in order to constrain the horizontal wavelength of possible propagating atmospheric waves (Yelle et al., JGR 101, 2149 (1996)). This work was supported by the Planetary Astronomy Program at NASA Ames and Lowell Observatory.

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