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ICARUS

International Journal of Solar System Studies

Volume 140, Number 2, August 1999

243    Active volcanism on Io: Global distribution and variations in activity
                Rosaly Lopes-Gautier, Alfred S. McEwen, William B. Smythe, P. E.. Geissler, L.. Kamp, A. G. Davies,
                J. R. Spencer, L. Keszthelyi, R. Carlson, F. E.. Leader, R. Mehlman, L.. Soderblom, and The Galileo
                NIMS and SSI Teams

265    Global color variations on Io
                P. E. Geissler, A. S. McEwen, L. Keszthelyi, R. Lopes-Gautier, J. Granahan, and D. P. Simonelli

283    The distribution of bright and dark material on Ganymede in relationship to
            surface elevation and slopes
                Jürgen Oberst, Björn Schreiner, Bernd Giese, Gerhard Neukum, James W. Head,
                Robert T. Pappalardo, and Paul Helfenstein

294    Mass movement and landform degradation on the icy Galilean satellites: Results
           of the Galileo nominal mission
                Jeffrey M. Moore, Erik Asphaug, David Morrison, John R. Spencer, Clark R. Chapman, Beau
                Bierhaus, Robert J. Sullivan, Frank C. Chuang, James E. Klemaszewski, Ronald Greeley,
                Kelly C. Bender, Paul E. Geissler, Paul Helfenstein, and Carl B. Pilcher

313    Lunar surface imaging polarimetry II. Mare Fecunditatis and Messier
                Audouin Dollfus

328    Heating of Jupiter's thermosphere by dissipation of gravity waves due to molecular
            viscosity and heat conduction
                Katia I. Matcheva and Darrell F. Strobel

341    Dynamical evolution of planetesimals in the outer Solar System I. The
            Jupiter/Saturn zone
                Kevin R. Grazier, William I. Newman, William M. Kaula, and James M. Hyman

353    Dynamical evolution of planetesimals in the outer Solar System II. The
            Saturn/Uranus and Uranus/Neptune zones
                Kevin R. Grazier, William I. Newman, Ferenc Varadi, William M. Kaula, and James M. Hyman

369    Physical model of Asteroid 1620 Geographos from radar and optical data
                R. S. Hudson and S. J. Ostro

379    Mainbelt asteroids: Results of Arecibo and Goldstone radar observations of 37
            objects during 1980-1995
                Christopher Magri, Steven J. Ostro, Keith D. Rosema, Michael L. Thomas, David L. Mitchell,
                Donald B. Campbell, John F. Chandler, Irwin I. Shapiro, Jon D. Giorgini, and Donald K. Yeomans

408    The asteroid identification problem II. Target plane confidence boundaries
                Andrea Milani and Giovanni B. Valsecchi

424    Hubble Space Telescope observations of the nucleus of Comet 45P/Honda-Mrkos-
            Pajdusakova and its inner coma
                P. L. Lamy, I. Toth, M. F. A'Hearn, and H. A. Weaver

439    Adaptation of planetary atmospheres modeling methods for analysis of coma dust
            optical properties in Comet C/1995 O1 (Hale-Bopp): I
                Dana Xavier Kerola and Stephen M. Larson

446    From the interstellar medium to Earth's oceans via comets-an isotopic study of
            HDO/H₂O
                D. Laufer, G. Notesco, A. Bar-Nun, and T. Owen

451    Laboratory studies of the formation of methanol and other organic molecules by
            water + carbon monoxide radiolysis: Relevance to comets, icy satellites, and
            interstellar ices
                R. L. Hudson and M. H. Moore

           NOTES

462    The recent orbital history of periodic Comet P/Lagerkvist (1996 R2)
                Gerhard Hahn and Claes-Ingvar Lagerkvist

464    Polarimetry of Asteroid 2100 Ra-Shalom at large phase angle
                N. N. Kiselev, V. K. Rosenbush, and K. Jockers

467    Author Index for Volume 140

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