This dataset presents a collection of 2334 published and 319 unpublished results in cometary polarimetry. The database contains 2653 measurements of linear and circular polarization for 65 comets since 1940. The narrow-band and broad-band measurements within the spectral region 0.3-3.5 micron are presented. The ranges of phase angles, helio- and geocentric distances of comets are 0.4-122 deg, 0.6-4.8 AU and 0.03-4.9 AU, respectively. We have compiled 64 references to the published papers and some unpublished sources. The data are presented in a tabular format (ASCII code). The database can be used as the observational basis for detailed theoretical modeling, interpretation of the phase-angle and spectral dependence of polarization, classification of comets, and for selecting future space-mission targets.

This dataset presents a collection of 2334 published and 319 unpublished results in cometary polarimetry. The database contains 2653 measurements of linear and circular polarization for 65 comets since 1940. The narrow-band and broad-band measurements within the spectral region 0.3-3.5 micron are presented. The ranges of phase angles, helio- and geocentric distances of comets are 0.4-122 deg, 0.6-4.8 AU and 0.03-4.9 AU, respectively. We have compiled 64 references to the published papers and some unpublished sources. The data are presented in a tabular format (ASCII code). The database can be used as the observational basis for detailed theoretical modeling, interpretation of the phase-angle and spectral dependence of polarization, classification of comets, and for selecting future space-mission targets.

This data set presents tables 1, 2, 3, 4, 5 and 7 of 'Sizes, Shapes, Albedos, and Colors of Cometary Nuclei' (Lamy et al., 2004), and includes references for the sources cited. The authors culled this data from published or well-known unpublished sources, and have indicated what they judge to be the most reliable value available.

This data set presents tables 1, 2, 3, 4, 5 and 7 of 'Sizes, Shapes, Albedos, and Colors of Cometary Nuclei' (Lamy et al., 2004), and includes references for the sources cited. The authors culled this data from published or well-known unpublished sources, and have indicated what they judge to be the most reliable value available.

NASA's International Halley Watch 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 Radio Studies Spectral Line Subnetwork contains 107 spectra of Halley, spanning dates 1985 November 09 through 1986 May 11.

NASA's International Halley Watch 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 Radio Studies Spectral Line Subnetwork contains 107 spectra of Halley, spanning dates 1985 November 09 through 1986 May 11.

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The database presented here is comprised entirely of observations made utilizing conventional photoelectric photometers and narrowband filters isolating 5 emission species (OH, NH, CN, C3 and C2) and continua. This work was initiated by A'Hearn and Millis in 1976 and includes 2020 observations of 85 comets obtained over 429 nights through the end of 1992. The total number of observations, however, is not evenly distributed over the 85 comets. The median number of observations for a comet is 6, with only a single observation obtained for 14 comets while there were 820 observations of P/Halley. The majority of observations were obtained at either Lowell Observatory or Perth Observatory, however four other observatories were used including an extensive campaign on comet P/Halley from the Cerro Tololo Interamerican Observatory (CTIO). In this archive, results for a subset of 68 comets are presented while the results for P/Halley from this study are archived in the IHW archive.

The database presented here is comprised entirely of observations made utilizing conventional photoelectric photometers and narrowband filters isolating 5 emission species (OH, NH, CN, C3 and C2) and continua. This work was initiated by A'Hearn and Millis in 1976 and includes 2020 observations of 85 comets obtained over 429 nights through the end of 1992. The total number of observations, however, is not evenly distributed over the 85 comets. The median number of observations for a comet is 6, with only a single observation obtained for 14 comets while there were 820 observations of P/Halley. The majority of observations were obtained at either Lowell Observatory or Perth Observatory, however four other observatories were used including an extensive campaign on comet P/Halley from the Cerro Tololo Interamerican Observatory (CTIO). In this archive, results for a subset of 68 comets are presented while the results for P/Halley from this study are archived in the IHW archive.