Session 20. Asteroid Physical Nature and Families

Contributed Oral Parallel Session, Chair: T.V. Johnson, A. Storrs, Tuesday, October 12, 1999, 8:30-10:00am, Sala Plenaria

20.01 Arecibo Radar Observations of Near-Earth Asteroids in 1999

M. C. Nolan, D. B. Campbell, A. A. Hine, J.-L. Margot, P. J. Perillat (NAIC--Arecibo Observatory), S. J. Ostro, L. A. M. Benner, J. D. Giorgini, D. K. Yeomans (JPL), J. F. Chandler (CFA)

20.02 Radar Interferometric Imaging of Near-Earth Asteroids

J. L. Margot, M. C. Nolan (NAIC - Arecibo Observatory)

20.03 Direct Measurements of Asteroid Sizes and Duplicity Search by the HST FGS Interferometer

P. Tanga, D. Loreggia (Oss. Astronomico di Torino), D. Hestroffer (Bureau des Longitudes), M. Lattanzi, A. Cellino (Oss. Astronomico di Torino), F. Guglielmetti (STScI), M. Di Martino, V. Zappala (Oss. Astronomico di Torino)

20.04 Predicting Crater Distributions on the Surface of Asteroid

O.S. Barnouin-Jha, A.F. Cheng (The Johns Hopkins University Applied Physics Laboratory)

20.05 Porosity of Small Bodies and a Reassesment of Ida's Density

T. V. Johnson (Jet Propulsion Laboratory/Caltech)

20.06 Discovery of Asteroidal Satellite S/1998\thinspace (45)\thinspace 1

W.J. Merline (SwRI), L.M. Close (ESO), C. Dumas (JPL), C.R. Chapman (SwRI), F. Roddier (U.~Hawaii), F. M\'enard (CFHT), W. Colwell (SwRI), D.C. Slater (SwRI), G. Duvert (Obs.~Grenoble, France), C. Shelton (W.M. Keck Obs.), T. Morgan (NASA HQ)

20.07 Constraining the Recent Impactor Flux on the Earth and Moon

J.A. Grier (Lunar and Planetary Laboratory, U. Arizona and Planetary Sciences Institute), A.S. McEwen (LPL, Univ. of Arizona), P.G. Lucey (Hawaii Institute of Geophysics and Planetology, U. Hawaii at Manoa), M. Milazzo, R.G. Strom (LPL, Univ. of Arizona)

20.08 Synthetic Proper Elements of Asteroids

Z. Kne\v zevi\'c (Astron. Obs., Belgrade), A. Milani (Univ. Pisa)

20.09 On the Stability of the L₄ and L₅ Triangular Lagrangian Points of Saturn

F. T\'eger (ELTE)