Orbital and physical characteristics of micrometeoroids in the inner solar system as observed by HELIOS 1

Details Orbital and physical characteristics of micrometeoroids in the inner solar system as observed by HELIOS 1 Orbital and physical characteristics of micrometeoroids in the inner solar system as observed by HELIOS 1

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980p%26ss...28..333g&link_type=abstract

Planetary and Space Science, vol. 28, Mar. 1980, p. 333-349. Research supported by the Bundesminister für Forschung und Technol

Mathematics

Probability

21

Helios 1, Interplanetary Dust, Micrometeoroids, Solar Orbits, Eccentricity, Physical Properties, Sensitivity, Solar System, Spacecraft Instruments

Scientific paper

Results of the micrometeoroid experiments on the Helios 1 spacecraft are described, concerning the distribution of interplanetary dust in the inner solar system, its dynamics, and the physical and chemical characteristics of micrometeoroids. Attention is given to the ecliptic sensor covered by a thin protective film, the south sensor, and the detection probability of elliptic meteoroid orbits, as well as the pulse height distribution of the positive charge signals released upon impacts of micrometeoroids onto the Helios sensors, and the azimuthal distribution of impacts on both sensors. It was found that apex particles, predominantly detected by the ecliptic sensor, have eccentricities less than 0.4 or semimajor axes less than or equal to 0.5 AU, while the excess of impacts on the south sensor have orbit eccentricities greater than 0.4 and semimajor axes greater than 0.5 AU.

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