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ICARUS

International Journal of Solar System Studies

Volume 145, Number 1, May 2000

     1   In Memoriam: Victor Sergeyevich Safronov (1917-1999)
                Joseph A. Burns, Jack J. Lissauer, and Andrei Makalkin

    4   Fugitives from the Eos family: First spectroscopic confirmation
                V. Zappalà, Ph. Bendjoya, A. Cellino, M. Di Martino, A. Doressoundiram, A. Manara,
                and F. Migliorini

 12     Virtual impactors: Search and destroy
                Andrea Milani, Steven R. Chesley, Andrea Boattini, and Giovanni B. Valsecchi

 25     Size and shape of Trojan Asteroid Diomedes from its occultation and photometry
                Isao Sato, Lenka Sarounová, and Hideo Fukushima

 33     Earth Trojan asteroids: A study in support of observational searches
                Paul Wiegert, Kimmo Innanen, and Seppo Mikkola

 44     A search for resonant structures in the Zodiacal cloud with COBE DIRBE:
           The Mars wake and Jupiter's Trojan clouds
                Marc J. Kuchner, William T. Reach, and Michael E. Brown

 53     Micrometer observations using the Arecibo 430 MHz radar. I. Determination of
           the ballistic parameter from measured Doppler velocity and deceleration results
                D. Janches, J. D. Mathews, D. D. Meisel, and Q. -H. Zhou

 64    Asteroid impact tsunami: A probabilistic hazard assessment
                Steven N. Ward and Erik Asphaug

 79    ISO observations of Mars: An estimate of the water vapor vertical distribution
          and the surface emissivity
                M. J. Burgdorf, Th. Encrenaz, E. Lellouch, H. Feuchtgruber, G. R. Davis, B. M. Swinyard,
                Th. de Graauw, P. W. Morris, S. D. Sidher, M. J. Griffin, F. Forget, and T. L. Lim

 94    Possible frost mounds in an ancient martian lake bed
                Nathalie A. Cabrol, Edmond A. Grin, and Wayne H. Pollard

108    Interpreting the elliptical crater populations on Mars, Venus, and the Moon
                William F. Bottke, Jr., Stanley G. Love, David Tytell, and Timothy Glotch

122    Integrated spectral analysis of Mare soils and craters: Applications to eastern
           nearside basalts
                Matthew I. Staid and Carle M. Pieters

140    Wave disturbances from the Comet SL-9 impacts into Jupiter's atmosphere
                R. L. Walterscheid, D. G. Brinkman, and G. Schubert

147    The crossings of Saturn ring plane by the Earth in 1995: Ring thickness
                François Poulet, Bruno Sicardy, Christophe Dumas, Laurent Jorda, and Didier Tiphène

166    Photochemistry of Saturn's atmosphere. II. Effects of an influx of external oxygen
                Julianne I. Moses, Emmanuel Lellouch, Bruno Bézard, G. Randall Gladstone,
                Helmut Feuchtgruber, and Mark Allen

203    Polarimetric observations of Comets C/1995 O1 Hale-Bopp and C/1996 B2
           Hyakutake
                N. Manset and P. Bastien

220    Collision rates in the present-day Kuiper belt and Centaur regions: Applications to
            surface activation and modification on comets, Kuiper belt objects, Centaurs, and
            Pluto-Charon            
                Daniel D. Durda and S. Alan Stern

230    Do cometesimal collisions lead to bound rubble piles or to aggregates held
           together by gravity?
                Sin-iti Sirono and J. Mayo Greenberg

239    The dust environment of Comet 46P/Wirtanen at perihelion: A period of
            decreasing activity?
                Marco Fulle

252    Melt production in oblique impacts
                E. Pierazzo and H. J. Melosh

262    Synthetic spectra of simulated terrestrial atmospheres containing possible
            biomarker gases
                Trent L. Schindler and James F. Kasting

272    Racemization of meteoritic amino acids
                Barbara A. Cohen and Christopher F. Chyba

282    IR detection of H₂O₂ at 80 K in ion-irradiated laboratory ices relevant to Europa
                M. H. Moore and R. L. Hudson

289    Measurements of high-, room-, and low-temperature photoabsorption cross
           sections of SO₂ in the 2080- to 2950-Å region, with application to Io
                C. Y. Robert Wu, B. W. Yang, F. Z. Chen, D. L. Judge, J. Caldwell, and L. M. Trafton

        NOTE

297   Laboratory studies of catalysis of CO to organics on grain analogs
                R. F. Ferrante, M. H. Moore, J. A. Nuth III, and T. Smith

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