First Galileo Orbiter Images of the Jovian Satellites.

Details First Galileo Orbiter Images of the Jovian Satellites. First Galileo Orbiter Images of the Jovian Satellites.

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996dps....28.0103c&link_type=abstract

American Astronomical Society, DPS meeting #28, #01.03; Bulletin of the American Astronomical Society, Vol. 28, p.1053

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Scientific paper

Near perijove, on completion of its first orbit around Jupiter, the Galileo spacecraft took close-up images Ganymede and more distant images of Io and Europa. Views at 70 m/pixel of Uruk Sulcus, on Ganymede, show cross-cutting fractures down to the resolution limit, no evidence of volcanism, and numerous impact craters with poorly defined ejecta patterns. At similar resolutions, Galileo Regio and Memphis Facula appear heavily cratered and to consist of bright, fractured hummocks and ridges separated by dark, low areas. The closest images of Ganymede have a resolution of 11 m/pixel. Numerous changes have taken place on Io since Voyager. Ra Patera, although not a hot spot has changed dramatically. The hot spot at Euboea has new markings. Surt and Aten resemble their appearance during Voyager 1. Loki, despite enormous activity during the last two decades, appears unchanged. Pele is surrounded by red pyroclastic deposits and red deposits are extensive at high latitudes. A 4-frame, 1.6 km/pixel mosaic provides the closest view yet of Europa. Numerous irregular pits and craters seen near the terminator suggest the surface may be older than formerly thought. Also visible at the terminator are cross-cutting, long, narrow ridges. At mid-latitudes long, linear triple bands, with diffuse outer margins and a narrow bright line down the center, cut each other with clear transection relations. At the equator, the pattern of dark bands is complex, with intersecting circles and arcs. All the bands become less distinct where they cross broad, diffuse, mottled zones.

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