Computer Science – Graphics
Scientific paper
Aug 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975icar...25..569d&link_type=abstract
(International Astronomical Union, Colloquium on Planetary Satellites, 28th, Ithaca, N.Y., Aug. 18-21, 1974.) Icarus, vol. 25, A
Computer Science
Graphics
3
Data Processing, Jupiter (Planet), Light Curve, Natural Satellites, Occultation, Albedo, Astronomical Models, Computer Graphics, Data Acquisition, Eclipses, Satellite Orbits
Scientific paper
Results of processing seven mutual occultation lightcurves are presented. The lightcurves were obtained using the 60-in. telescope (152 cm) at Mt. Wilson to observe six J1 occulting J2 events and one J3 occulting J2 event. Using a uniformly illuminated disk model, local satellite Jovicentric longitude corrections of 675 plus or minus 150 km, 275 plus or minus 240 km, and 1175 plus or minus 350 km for J1, J2, and J3, respectively, were determined. These corrections enabled the event midpoint times to be computed to within 5 sec of the observed midpoint times for all seven events. These longitude corrections have been verified by Pioneer 10 and recent (1973 and 1974) conventional Jovian eclipse observations. A relative J1:J2 out-of-plane error of less than a few hundred kilometers has been indicated; however, it appears that the relative J3:J2 out-of-plane error is larger than 600 km. Deficiencies in both the uniformly illuminated disk model and Sampson's theory of the Galilean satellite motions for the reduction of mutual event data are described.
Duxbury Thomas C.
Johnson Torrence V.
Matson Dennis L.
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