Proceedings

0bservatoire 30 April A'Hearn albedo amorphous ice analysis antenna apparition Astrometry Astron Astrophys Brandt brightness camera cloud Comet Bradfield Comet Halley Comet Kohoutek Comet West cometary ions Coordinated Ground-based Observations density detected detector Discipline Specialist dust particles dust tails Earth electron emission energy ephemeris ESO Workshop Festou Figure flux Giotto Giotto mission Halley Watch Halley's Comet heliocentric distance Helios Icarus impact infrared inner coma International Halley Watch interstellar medium ionization Jockers light curve lines magnetic field magnitude Mass Spectrometer measurements Mendis mission Need for Coordinated neutral nuclear region nucleus Observations of Halley's observatories obtained optical orbit P/Halley parent molecules perihelion perihelion passage photographs photometry plasma tail plates production rate radio ratio resolution rotation Schmidt Sekanina sensor shows solar wind space spacecraft spatial species spectral range spectrum stars structure tail rays telescope temperature transition Triplet velocity wavelength Yeomans