On the Titan/28 Sagittarii occultation of 1989 July 3

Details On the Titan/28 Sagittarii occultation of 1989 July 3 On the Titan/28 Sagittarii occultation of 1989 July 3

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.338..365m&link_type=abstract

In ESA, Symposium on Titan p 365-370 (SEE N92-32348 23-91)

Physics

Observation, Photoelectricity, Planetary Atmospheres, Stellar Occultation, Titan, Aerosols, Data Reduction, Meteorology, Sagittarius Constellation

Scientific paper

Preliminary results of photoelectric observations of this rare event depicting a central flash are discussed and the observational procedure is described. The occultation record represents the most northern path, projected at Titan, to be monitored photoelectrically. Two conspicuous minima observed at ingress and at egress are tentatively associated with the upper and lower detached haze layers detected by the Voyager spacecraft. The central flash lasted 0.7 s at half peak height, and at maximum reached 19 +/- 3 percent of the intensity of the unocculted star. Residual transmitted light during occultation fell to the unusually low value of 0.7 +/- 0.5 percent of its normal intensity indicative of absorption from atmospheric aerosols, possessing a tangential optical depth of 2 to 3 at an altitude of about 250 to 300 km.

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