This data set presents the photometry of comet 1P/Halley collected by the International Halley Watch (IHW) Infrared Studies Network (IRSN) over the period September 1984 to April 1988. Version 2 includes data submitted after the initial archive generation.

This data set presents the photometry of comet 1P/Halley collected by the International Halley Watch (IHW) Infrared Studies Network (IRSN) over the period September 1984 to April 1988. Version 2 includes data submitted after the initial archive generation.

NASA's International Halley Watch (IHW) has created a Comet Halley Archive. The collection of data spans the full wavelength range as submitted by scientists to the IHW. The observations belong to one of the following Disciplines: Amateur, Astrometry, Infrared Studies, Large-Scale Phenomena, Meteor Studies, Near-Nucleus Studies, Photometry and Polarimetry, Radio Studies, and Spectroscopy and Spectrophotometry. The data collected by these nine disciplines were augmented by Spacecraft measurements. The data were submitted to IHW, but the evaluation and selection for the Archive has been the primary responsibility of the Discipline Specialist Teams for each network in cooperation with the Lead Center. The data from the Near Nucleus Studies Network contains 3523 images of Halley. These data span dates 1982 October 16 through 1989 April 12.

In preparation for the concerted international study of Comet Halley, the IHW conducted a trial run with observations of Comet Crommelin, largely during February and March of 1984.

In preparation for the concerted international study of Comet Halley, the IHW conducted a trial run with observations of Comet Crommelin, largely during February and March of 1984.

In preparation for the concerted international study of Comet Halley, the IHW conducted a trial run with observations of Comet Crommelin, largely during February and March of 1984.

This data set presents the infrared spectroscopy of Comet 1P/Halley archived with the Infrared Studies Network (IRSN) of the International Halley Watch (IHW). 59 spectra were obtained over the period 1985-10-29 to 1986-05-24 at a number of observatories using various instrumental systems.

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.

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.

This data set presents the fluxes derived from narrow band photometry of Comet 1P/Halley as part of the International Halley Watch (IHW) Photometry and Polarimetry Netword (PPN). Standard filters, reference stars and reduction procedures were used as far as possible to reduce all narrowband data submitted to the PPN. The original data have been reformatted data supplied as addenda to the original submission have been added and the accompanying documentation updated in this revised version.