Outer planet studies

Abstract

Spectrophotometric observation were completed of Titan and determinations of its geometric and Bond albedos and completion of like observations of Uranus, pre-Voyager encounter. CH3D was studied in the spectrum of Uranus and a determination of the CH3D/CH4 mixing ratio in its atmosphere. The observations needed for a direct calibration of the Sun against Vega was completed. The study was continued of CH3D in the spectra of Saturn and Titan. High resolution observations of O I, C2 and C-12 C-13 in the coma of P/Halley were also studied.