Dust Measurements During Ulysses' 2nd Jupiter Encounter

Abstract

In 2004 the Ulysses spacecraft had its second flyby at Jupiter at 0.8 AU from the planet. 28 dust streams emanating from the jovian system were identified over a 26- month period while the spacecraft was within 4 AU of the planet, and the dust instrument was operating, scanning jovigraphic latitudes from +75 degrees to -25 degrees . From late 2002 until mid 2005, jovian dust stream particles dominated the overall impact rate, reaching a maximum of about 2000 per day in mid 2004. The dust stream data imply strong coupling of the grains to the interplanetary magnetic field. Ulysses also continuously monitored the interstellar dust stream in the heliosphere.