Tabulated astrometric observations of Comet 1P/Halley during its 1986 apparition, and re-reduced observations from the 1835 and 1910 apparitions.

 
Citation Yeomans, D.K., R.M. West, R.S. Harrington and B.G. Marsden, IHW COMET HALLEY ASTROMETRIC DATA, V2.0, IHW-C-ASTR-2-EDR-HALLEY-V2.0, NASA Planetary Data System, 2006.
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Data Set Abstract The Astrometry Net of the International Halley Watch (IHW) compiled astrometric observations of comet 1P/Halley from observations made by professional astronomers from ground-based observatories all over the world. The data set comprises 6475 astrometric observations over the period 16 Oct 1982 through 9 Jan 1989, in addition to 158 observations from the 1835 apparition and 1696 observations from the 1910 apparition. The data from previous apparitions was re-reduced using modern star catalogs.
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    Additional Information
    Mission Information INTERNATIONAL HALLEY WATCH
    Data Set Information IHW-C-ASTR-2-EDR-HALLEY-V2.0
    Instrument Host Information ASTR
    Instrument Information ASTR
    Target Information 1P/HALLEY 1 (1682 Q1)