Baguhl, M., E. Grün, D.P. Hamilton, G. Linkert, R. Riemann, P. Staubach and H. Zook 1995. The flux of interstellar dust observed by Ulysses and Galileo. Spa. Sci. Rev 72, 471-476.

Interstellar dust detected by the dust sensor onboard Ulysses was first identified after the Jupiter flyby when the spacecraft's trajectory changed dramatically (Gr\"un et al., 1994). Here we report on two years of Ulysses post-Jupiter data covering the range of ecliptic latitudes from 0\deg to -54\deg and distances from 5.4 to 3.2~AU. We find that, over this time period, the flux of interstellar dust particles with a mean mass of $3\cdot 10^{-13}$~g stays nearly constant at about $1\cdot 10^{-4}$~\fluxunits~with both ecliptic latitude and heliocentric distance.

Also presented are 20 months of measurements from the identical dust sensor onboard the Galileo spacecraft which moved along an in-ecliptic orbit from 1.0 to 4.2~AU. From the impact direction and speeds of the measured dust particles we conclude that Galileo almost certainly sensed interstellar dust outside 2.8~AU; interstellar particles may also account for part of the flux seen between 1 and 2.8 AU.
Return to Doug Hamilton's Publication List