Dust density and mass distribution near comet Halley from Giotto observations

  title={Dust density and mass distribution near comet Halley from Giotto observations},
  author={John McDonnell and W. Merle Alexander and W. M. Burton and Ezio Bussoletti and David H. Clark and Rejean J. L. Grard and Eberhard Gr{\"u}n and Martha S. Hanner and David W. Hughes and Eduard Igenbergs and Heribert Kuczera and Bertil Anders Lindblad and Jean-claude Mandeville and Angelantonio Minafra and G. Schwehm and Zdeněk Sekanina and Max K. Wallis and John C. Zarnecki and Sepideh Chakaveh and Gordon Evans and S. T. Evans and Jack Graham Firth and A. N. Littler and Lutz Massonne and R. E. Olearczyk and George S. Pankiewicz and Tim J. Stevenson and Raymond F. Turner},
The dust impact detection system (DIDSY) carried by the Giotto spacecraft has measured the density and mass spectrum (in the range 10−20–10−8 kg) of the dust near comet Halley. Profiles of the dust spectrum obtained at a distance of 291,000 km from the Halley nucleus show a complex mass spectrum, depleted in intermediate and small masses. Near closest approach (∼600 km from the nucleus), the dust activity increases dramatically and the spectrum is dominated by larger masses. The cumulative mass… 

Dust distribution of comet P/Halley’s inner coma determined from the Giotto Radio-Science Experiment

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