Physics
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.1311g&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 12, June 19, 1992, p. 1311-1314. Research supported by BMFT.
Physics
25
Galileo Project, Interplanetary Dust, Particle Collisions, Ulysses Mission, Asteroid Belts, Collision Rates, Eccentric Orbits, Orbital Elements
Scientific paper
The Galileo and Ulysses spaceprobes carry two similar dust detectors through interplanetary space from Venus to Jupiter. Impacts are reported which correspond to dust particles above a mass threshold of about 10 exp 13 g for which complete records exist. Between December 1989 and January 1992 Galileo repeatedly traversed interplanetary space between 0.7 and 2.26 AU and recorded 374 impacts. The observed impact rates ranged from 0.1 to about 3 impacts per day strongly dependent on whether the spacecraft moved toward or away from the sun. From October 1990 to January 1992 the Ulysses spacecraft had reached a distance of 5.17 AU from the sun and had recorded 72 impacts at rates between 0.1 and 0.5 per day. Inside about 2 AU the observed fluxes are compatible with a population of interplanetary dust particles moving on low to moderately eccentric and low inclination orbits. Outside this distance a dust particle population on different orbits is required in order to explain the Ulysses data.
Baguhl Michael
Fechtig Hugo
Gruen Eberhard
Hanner Martha S.
Kissel Jeff
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