Search Results
151–200 of 254 results (0.001 seconds)
-
bundle:
Asteroid Lightcurve Data Exchange Format (ALCDEF) Database V1.0
The Asteroid Lightcurve Data Exchange Format (ALCDEF) database contains metadata and data produced by asteroid time-series photometry by amateurs and professionals and submitted to the database using a format that follows ALCDEF standards definition. There are three related data files: metadata, lightcurve data, and - optionally - comparison stars data. The ALCDEF structure is based on the concept of "lightcurve blocks." Each block contains two (optionally, three) sections: metadata, compstars (optional), and lcdata. Because of the very large number of observations (9944193) for 23847 distinct objects, there are multiple files for the metadata, compstars, and lcdata sections. Each compstars and lcdata file covers the same objects that are in a given metadata file. For example, if the metadata file covers objects numbered 1 to 100, then the corresponding compstars and lcdata files will contain data for those objects only. The ordering of the records in a metadata file is based on the object's number with its name used as the first tie-breaker for unnumbered objects, i.e., when number = 0. For lightcurve blocks of the same object, the SessionDateTime, in ascending order, provides the second tie-breaker. If necessary, the Filter is used for the third tie-breaker. There are 222 data files in the archive, which is comprised of sets of three files (metadata, compstars, and lcdata) with each set having the same base name. The metadata files are split by ObjectNumber into groups, each in its own subdirectory under the root\data directory, containing no more than 100 objects for those numbered between 1 and 999, not more than 1,000 for those numbered between 1,000 and 9,999, and no more than 10,000 for those numbers greater than 10,000. Unnumbered asteroids are grouped into a single file. N.B. Since compstars are not required, it's possible that an entire set of metadata records, e.g., 5400000-550000, will have no compstars at all. The current PDS4 standard does not allow for 0 records in a file so, in this case, a single record is added to the compstars-xxx-xxx.csv that gives the default for a missing entry, e.g., -9 for an integer and '-' for an empty string. Each record in an alcdef_metadata_XXX file includes, among others, the object number and/or name and/or designation, the mid-date (UT) of the data associated with the given lightcurve block, the person submitting the data, contact information for the submitter, equipment used, the filter and magnitude band (e.g., Johnson V) used for the observations, and any corrections applied to the original, raw data (e.g., reduction to unity distances or transformed to a photometric standard such as Johnson-Cousins or SDSS). Each record in an alcdef_lcdata_XXX file gives the JD and magnitude (magnitude error, optional) for a single observation (data point) along with an ID number that ties the observation to a specific metadata record. Each record in an alcdef_compstars_XXX file provides details on one of the comparison stars used during the observations along with an ID number that ties the comp star data to a specific metadata record. Each record includes, among others, the name, RA/DEC (J2000.0), magnitude, and - if used - the color index of each star. Up to 10 comp stars are allowed for each metadata record. The archive includes an alcdef_standard.pdf file that provides extensive details about the ALCDEF standard such as keywords, appropriate values, and cross-checks run during submission to avoid having incomplete data. For example, if the magnitudes have been reduced to unity distances, whether or not a fixed value (at mid-time) was used or point-by-point. The file includes bookmarks for easy navigation to specific sections. Caveats to the data user ======================== The data have been submitted without verification of accuracy. Unlike astrometry, where checks can be run to see if the reported position is reasonable against current orbital parameters, the ALCDEF data should be taken "as-is" and so it is up to the end user to determine which individual lightcurve blocks are suitable for his purposes. The ALCDEF standard and software used to generate ALCDEF files have evolved since the format was introduced in 2010. Therefore, a number of fields that would normally have data in a recent entry will have the default value for "missing" or NULL data. Also, when magnitudes are simple differentials, e.g., +0.758, early data entry did not provide for the zero point that led to the differential value and so the actual "sky magnitude" for the data point is unknown. Also of concern for early submissions is the naming of individual comp stars. Initially, the software often used by amateurs used the X/Y coordinates of the star on a reference image for the name. Afterwards, that software used the Right Ascension and Declination (J2000.0) for the name, e.g., "102310.58 +213512.6". This was preferred over using the number/name from the reference star catalog, which was often Zone:Number and not always fixed depending of the catalog and/or its version. -
collection:
Sawyer Asteroid Spectra V1.0
This data set contains 94 optical asteroid spectra obtained by Scott Sawyer as part of his Ph.D. dissertation at the University of Texas at Austin. Observational circumstances and processing level are also provided. -
collection:
Asteroid Polarimetric Database V2.0
The Asteroid Polarimetric Database (APD) is a collection of asteroid polarimetry results compiled by D.F. Lupishko of Karazin Kharkiv National University, Ukraine. It is intended to include most asteroid polarimetry available through November 15, 2021. -
collection:
document collection for the "NEAR EARTH ASTEROID TRACKING" bundle
This is the document collection for the gbo.ast.neat.survey bundle. The Near-Earth Asteroid Tracking (NEAT) project began as a collaborative effort with the United States Air Force (USAF) in December 1995. It concentrated on the discovery and observations of near-Earth asteroids and comets, collectively called near-Earth objects (NEOs). NEAT ended its observations in April 2007. Throughout its history, NEAT utilized three 1m class telescopes - two on the Hawaiian island of Maui and the 1.2m Oschin Schmidt telescope at Palomar Observatory near San Diego, CA. Three unique cameras were developed and used throughout the program. These data are intended to be usable for photometric analysis of the various objects within the NEAT data. Most nights included calibration data, and the lists of photometric standard calibration fields. -
collection:
TNO AND CENTAUR DIAMETERS, ALBEDOS, AND DENSITIES V1.0
This data set is a compilation of published diameters, albedos, and densities for Transneptunian Objects (TNOs) and Centaurs. A total of 194 objects are listed, many with more than one entry. This version covers published values through 31 March 2018. -
collection:
Asteroid Photometric Catalog V1.0
This collection contains the documents applicable to the Asteroid Photometric Catalog bundle. -
collection:
data collection for the "TORINO ASTEROID POLARIMETRY" bundle
This is the data collection for the gbo.ast.torino.polarimetry bundle. This data set contains asteroid polarimetric observations made during 1995-2005 with the Torino photopolarimeter at the 2.15-m telescope at El Leoncito Observatory in Argentina. These observations are reported in Cellino et al. (2005). -
collection:
document collection for the "TORINO ASTEROID POLARIMETRY" bundle
This is the document collection for the gbo.ast.torino.polarimetry bundle. This data set contains asteroid polarimetric observations made during 1995-2005 with the Torino photopolarimeter at the 2.15-m telescope at El Leoncito Observatory in Argentina. These observations are reported in Cellino et al. (2005). -
collection:
Gaffey Meteorite Spectra V1.0
This data set contains 166 laboratory spectra of 108 meteorite samples, as reported by M. J. Gaffey in Gaffey (1976) [GAFFEY1976]. This in turn was based on his PhD thesis work (Gaffey 1974 [GAFFEY1974]). -
collection:
DES_Asteroid_taxonomy V1.0
We provide taxonomical information from Dark Energy Survey (DES) data for 16517 asteroids for which gri slope and i-z colors are available, taxonomical complex information for 58116 asteroids with DES colors g-r, g-i, and a list of 409 new possible V-type objects. -
collection:
data collection for the "REDDY MAIN BELT ASTEROID SPECTRA" bundle
This is the data collection for the gbo.ast-mb.reddy.spectra bundle. This data set contains low-resolution (R~150) near-infrared (0.7-2.5 microns) spectra of 90 main belt asteroids observed with the SpeX instrument on the NASA Infrared Telescope Facility (IRTF) on Mauna Kea, Hawai'i. This data set archives reduced, calibrated spectra of targets of opportunity observed from 2001 to 2012. -
collection:
document collection for the "ASTEROID NAMES AND DISCOVERY" bundle
This is the document collection for the compil.ast.names bundle. This data set includes names, designations, and discovery circumstances for the asteroids numbered as of April 20, 2008. -
collection:
document collection for the "LEBOFSKY ET AL. 3-MICRON ASTEROID DATA " bundle
This is the document collection for the gbo.ast.lebofsky-etal.3-micron-spectra bundle. 3-micron spectrophotometric data on asteroids collected from several papers by Lebofsky, Jones, and Feierberg and their collaborators, published 1980-1990. -
collection:
OSIRIS-REx Mt. Bigelow Ground Based Bennu Observations V1.0
This data set includes the ECAS system (Eight Color Asteroid Survey) photometry and light curve observations of the asteroid 101955 Bennu as well as the derived light curves. At the time of the observations, September 2005, the asteroid carried the provisional designation 1999 RQ36. Observations were made as a part of the OSIRIS-REx asteroid sample return mission ground observing campaign to characterize potential mission targets. 101955 Bennu was subsequently chosen as the mission target. This particular data set contains observations of 101955 Bennu and a series of 5 standard stars taken at the University of Arizona Observatories Kuiper 1.54-m reflector. -
collection:
Small Main-Belt Asteroid Spectroscopic Survey, Phase II V1.0
This data set contains visible-wavelength (0.435-0.925 micron) spectra for 1341 main-belt asteroids observed during the second phase of the Small Main-belt Asteroid Spectroscopic Survey (SMASSII) between August 1993 and March 1999. The purpose of the SMASSII survey was to provide a new basis for studying the compositional diversity and structure of the asteroid belt. Based on experiences gained from the earlier SMASS survey, SMASSII focused on producing an even larger, internally consistent set of CCD spectra for small (D < 20 km) main-belt asteroids. The observing strategies and procedures used during SMASSII roughly parallel those used in the first survey (Xu et al. Icarus 115 1-35, 1995), though several minor changes were made in instrumentation and in portions of the data reduction process. -
collection:
OSIRIS-REx Mt. Bigelow Ground Based Bennu Observations V1.0
This data set includes the ECAS system (Eight Color Asteroid Survey) photometry and light curve observations of the asteroid 101955 Bennu as well as the derived light curves. At the time of the observations, September 2005, the asteroid carried the provisional designation 1999 RQ36. Observations were made as a part of the OSIRIS-REx asteroid sample return mission ground observing campaign to characterize potential mission targets. 101955 Bennu was subsequently chosen as the mission target. This particular data set contains observations of 101955 Bennu and a series of 5 standard stars taken at the University of Arizona Observatories Kuiper 1.54-m reflector. -
collection:
document collection for the "FORNASIER SPECTRA OF M ASTEROIDS" bundle
This is the document collection for the gbo.ast-m-type.fornasier.spectra bundle. This data set contains reduced composite visual and near-infrared spectra of thirty M-type asteroids, observed over the years 2004-2008 and presented in Fornasier et al. (2010). The spectra were taken with the Dolores and NICS instruments at the Telescopio Nationale Galileo (TNG) in La Palma, with the EMMI and SOFI instruments at the ESO New Technology Telescope (NTT) in Chile, and with the SPeX instrument at the Infrared Telescope Facility (IRTF) in Hawaii. The individual spectra from the various instruments used to produce the composite spectra are also included. -
collection:
Fieber-Beyer IRTF Mainbelt Asteroid Spectra V2.0
The data set contains observations obtained with the NASA IRTF SpeX instrument covering the 0.7 to 2.5 micron near-infrared portion of the spectrum. The data set archives reduced, calibrated spectra which were obtained by Sherry Fieber-Beyer and archives reduced, calibrated spectra. -
collection:
document collection for the "24-COLOR ASTEROID SURVEY" bundle
This is the document collection for the gbo.ast.24-color-survey bundle. This bundle is comprised of asteroid flux data measured in 26 filters using the McCord dual beam photometer, and covering the range 0.32 - 1.08 microns for 285 numbered asteroids, as published in Chapman & Gaffey (1979b) and McFadden, et al. (1984). -
collection:
data collection for the "DELBO THERMAL INFRARED ASTEROID DIAMETERS AND ALBEDOS" bundle
This is the data collection for the ast.delbo.radiometric-diameters-albedos bundle. This data set contains radiometric albedos and diameters for Near Earth Asteroids (NEAs) derived by three different thermal models and reported in Delbo (2004) [DELBO2004]. The observed infrared fluxes on which the derivations were based are also included. -
collection:
TNO AND CENTAUR DIAMETERS, ALBEDOS, AND DENSITIES V1.0
This data set is a compilation of published diameters, albedos, and densities for Transneptunian Objects (TNOs) and Centaurs. A total of 194 objects are listed, many with more than one entry. This version covers published values through 31 March 2018. -
collection:
data collection for the "BUS-DEMEO ASTEROID TAXONOMY" bundle
This is the data collection for the ast.bus-demeo.taxonomy bundle. The Bus-DeMeo asteroid taxonomy classification system, described in DeMeo et al. (2009), is based on reflectance spectrum characteristics for 371 asteroids measured over the wavelength 0.45 to 2.45 microns. This system of 24 classes is constructed using principal component analysis, following most closely the visible wavelength taxonomy of Bus (1999), which itself builds upon the system of Tholen (1984). Nearly all of the Bus taxonomy classes are preserved, with one new class (Sv) defined. This data set includes a table of classifications in the Bus-DeMeo system for the 371 asteroids upon which the system is based. It also includes mean spectra for each of the classes. -
collection:
document collection for the "ASTEROID ALBEDOS FROM STELLAR OCCULTATIONS" bundle
This is the document collection for the ast.shevchenko-tedesco.occultation-albedos bundle. This data set contains albedos for 57 asteroids determined from diameters obtained from stellar occultations. These albedos are from Shevchenko and Tedesco (2006). -
collection:
document collection for the "OPTICAL CONSTANTS AND LAB SPECTRA OF WATER ICE" bundle
This is the document collection for the gbo.ices.mastrapa.lab-spectra bundle. Transmission spectra of amorphous and crystalline H2O-ice at temperatures from 20-150 K for a wavelength range from 1.11 to 2.63 microns. These spectra have not been continuum-corrected or had the infrared interference fringes removed. Optical constants (n and k values) were derived from these laboratory spectra and are included in the data set. -
collection:
Gartrelle et al. IRTF Asteroid Spectra V1.0
This data set is comprised of the VNIR (0.69-2.5 micron) spectra of twenty-five D-type asteroids from varying Solar System locations. The spectra were obtained from NASA/IRTF on Mauna Kea between 2016-2019 using the SpeX instrument in Low-Resolution Prism mode and the 0.8 x 15" slit. Guiding was performed using spillover light from the slit (GuideDog) for targets with apparent magnitude > 15.5. For targets fainter than magnitude 15.5, guiding was accomplished using the MORIS CCD imager. -
collection:
data collection for the "ASTEROID ALBEDOS" bundle
This is the data collection for the compil.ast.albedos bundle. This data set comprises a compilation of asteroid albedos for the convenience of the user. Most but not all of the albedos compiled here also appear in other PDS data sets. -
collection:
document collection for the "ASTEROID TAXONOMY" bundle
This is the document collection for the ast_taxonomy bundle. This data set is a collection of asteroid taxonomic classifications from various classification methods, collected from the literature. -
collection:
document collection for the "ASTEROID MASSES" bundle
This is the document collection for the compil.ast.masses bundle. This collection of asteroid masses and densities was compiled from the published literature by Jim Baer, Steve Chesley, and Dan Britt. Size and shape information are included as well to show the source of the tabulated bulk density. This is the version of the compilation as of April 18, 2012. -
collection:
data collection for the "SHAPE MODEL OF ASTEROID (153591) 2001 SN263" bundle
This is the data collection for the gbo.ast-153591.radar.shape-model bundle. We present the three-dimensional shapes and rotation states of the three components of near-Earth asteroid (153591) 2001 SN263 based on radar images and optical lightcurves (Becker et al., 2015. 2001 SN263 was observed in 2003 using the 12.6-cm radar at Arecibo Observatory. Optical lightcurves were obtained at several observatories and used to further constrain the shape modeling. -
collection:
data collection for the "IANNINI ASTEROID FAMILY SPECTRA" bundle
This is the data collection for the gbo.ast-iannini-family.spectra bundle. Keck/ESI spectra of 11 Iannini asteroid family members were obtained over visual wavelengths. The data have been published in Willman, et al. (2008Icar...195...663W)[WILLMANETAL2008]. The spectra show family likeness and are believed to represent young S class surfaces aged a few million years by space weathering, the dynamically estimated collisional age of the family. -
collection:
data collection for the "ASTEROID MASSES" bundle
This is the data collection for the compil.ast.masses bundle. This collection of asteroid masses and densities was compiled from the published literature by Jim Baer, Steve Chesley, and Dan Britt. Size and shape information are included as well to show the source of the tabulated bulk density. This is the version of the compilation as of April 18, 2012. -
collection:
document collection for the "SDSS MOVING OBJECT CATALOG" bundle
This is the document collection for the gbo.sdss-moc.phot bundle. The Sloan Digital Sky Survey (SDSS) Moving Object Catalog 4th release lists astrometric and photometric data for moving objects detected in the SDSS. The catalog includes various identification parameters, SDSS astrometric measurements (five SDSS magnitudes and their errors), and orbital elements for previously cataloged asteroids. The data set also includes a list of the runs from which data are included, and filter response curves. -
collection:
browse collection for the "SPECTRA OF V-TYPE CANDIDATES FROM THE SDSS MOC" bundle
This is the browse collection for the gbo.ast-v-type.moscovitz.spectra bundle. These data are the results of a spectroscopic survey designed to target and detect asteroids whose photometric colors are similar to those of Vesta family members and thus may be considered as candidates for having a basaltic composition. The colors of these candidates were measured as part of the 3rd release of the Sloan Digital Sky Survey Moving Object Catalog (Ivezic et al. 2001) [IVEZICETAL2001]. These spectra were obtained with two visible wavelength instruments: the Echellete Spectrograph and Imager (ESI, Sheinis et al. 2002) [SHEINISETAL2002] on Keck II and the Supernova Integral Field Spectrograph (SNIFS, Lantz et al. 2004) [LANTZETAL2004] at the University of Hawaii 2.2m telescope. A subset of these data were published in Moskovitz et al. (2008a, 2008b) [MOSKOVITZETAL2008, MOSKOVITZETAL2008B]. -
collection:
data collection for the "ASTEROID NAMES AND DISCOVERY" bundle
This is the data collection for the compil.ast.names bundle. This data set includes names, designations, and discovery circumstances for the asteroids numbered as of April 20, 2008. -
collection:
data collection for the "ASTEROID LIGHTCURVE DERIVED DATA" bundle
This is the data collection for the ast_lightcurve_derived_parameters bundle. This is a compilation of published rotational parameters derived from lightcurve data for asteroids, based on the Warner et al. (2009) Asteroid Lightcurve Database. This is the version as of February 3, 2017. In addition to reported rotational parameters by individual papers, there is a summary file with the values adopted by Harris, Warner, and Pravec as the most likely correct values for each asteroid. The data set also contains files listing known binary asteroids, asteroid spin axes, and 'tumbling' asteroids. -
collection:
data collection for the "SPECTROSCOPY AND PHOTOMETRY OF JUPITER TROJANS" bundle
This is the data collection for the gbo.ast-trojan.fornasier-etal.spectra bundle. This data set contains the results of the visible spectroscopic and photometric survey of Jupiter Trojans reported in Fornasier et al. 2004 and Fornasier et al. 2007. The survey was carried out in the years 2002-2005 at the 3.5 m New Technology Telescope of the European Southern Observatory at La Silla, Chile. Included are visible spectroscopy and BVRI photometry of 73 Jupiter Trojans. -
collection:
data collection for the "OPTICAL CONSTANTS AND LAB SPECTRA OF WATER ICE" bundle
This is the data collection for the gbo.ices.mastrapa.lab-spectra bundle. Transmission spectra of amorphous and crystalline H2O-ice at temperatures from 20-150 K for a wavelength range from 1.11 to 2.63 microns. These spectra have not been continuum-corrected or had the infrared interference fringes removed. Optical constants (n and k values) were derived from these laboratory spectra and are included in the data set. -
collection:
document collection for the "FIEBER-BEYER IRTF MAINBELT ASTEROID SPECTRA" bundle
This is the document collection for the gbo.ast.fieber-beyer.spectra bundle. The data set contains observations obtained with the NASA IRTF SpeX instrument covering the 0.7 to 2.5 micron near-infrared portion of the spectrum. The data set archives reduced, calibrated spectra which were obtained and used in Sherry Fieber-Beyer's Ph.D. dissertation at the University of North Dakota and archives reduced, calibrated spectra subsequent 2010. The research focused on asteroids in a zone centered on the 3:1 resonance. These spectra were used to mineralogically characterize asteroids in this zone in an attempt to identify their meteorite analogs. -
collection:
data collection for the "ASTEROID ABSOLUTE MAGNITUDES" bundle
This is the data collection for the compil.ast.magnitude-slope bundle. Absolute magnitudes and slopes, mostly IAU-adopted with exceptions noted, for all asteroids numbered as of the 2008 April 20 batch of Minor Planet Circulars. -
collection:
Sawyer Asteroid Spectra V1.0
This data set contains 94 optical asteroid spectra obtained by Scott Sawyer as part of his Ph.D. dissertation at the University of Texas at Austin. Observational circumstances and processing level are also provided. -
collection:
data collection for the "MOTHE-DINIZ ASTEROID DYNAMICAL FAMILIES " bundle
This is the data collection for the ast.mrc.families bundle. This bundle contains an updated compilation of asteroid families and clusters, resulting from the application of the Hierarchical Clustering Method (HCM) on a set of around 120,000 asteroids with available proper elements. Whenever available, the classification in the Bus taxonomy is provided for family members, based on spectra from the SMASS, SMASS2 and S3OS2 spectroscopic surveys. -
collection:
data collection for the "NEAR EARTH ASTEROID LIGHTCURVES" bundle
This is the data collection for the gbo.ast-neo.ondrejov.lightcurves bundle. This data set is a collection of photometric lightcurves for 42 near-earth asteroids obtained at Ondrejov Observatory from 1984 through 1998. -
collection:
data collection for the "SUBMILLIMETER LIGHTCURVES OF ASTEROIDS " bundle
This is the data collection for the gbo.ast.chamberlain.sub-mm-lightcurves bundle. Submillimeter lightcurves of large asteroids Ceres, Davida, Io, Juno, Pallas, Vesta, and Victoria, observed at the Heinrich-Hertz Submillimeter Telescope from January 2003 through May 2004. -
collection:
document collection for the "SHAPE MODEL OF ASTEROID (153591) 2001 SN263" bundle
This is the document collection for the gbo.ast-153591.radar.shape-model bundle. We present the three-dimensional shapes and rotation states of the three components of near-Earth asteroid (153591) 2001 SN263 based on radar images and optical lightcurves (Becker et al., 2015. 2001 SN263 was observed in 2003 using the 12.6-cm radar at Arecibo Observatory. Optical lightcurves were obtained at several observatories and used to further constrain the shape modeling. -
collection:
data collection for the "OLIVINE LABORATORY INFRARED ABSORBANCE SPECTRA" bundle
This is the data collection for the gbo.olivines.pitman.lab-spectra bundle. Laboratory measurements quantifying the effect of Fe substituting for Mg in olivine are necessary to distinguish compositional from temperature, grain size and grain shape effects in observational data. This bundle presents room temperature (18-19 degrees Celsius) diamond anvil cell thin film absorption spectra of a large suite of olivines evenly spaced across Mg and Fe compositions at infrared wavelengths. In each file, the left column is the frequency in wave numbers (units: cm**-1). The right column is the chemical absorbance (common logarithm based). -
collection:
IRTF Near-IR Imaging of Comet 9P/Tempel 1 during Deep Impact Encounter
Near-IR images of Comet 9P/Tempel 1 were obtained at the NASA IRTF during the period from June 24 through July 17, 2005 UT. These observations were taken as part of a campaign designed to support the science objectives of the Deep Impact spacecraft around the time of its encounter with Tempel 1. This data set contains all raw images, including those required for reduction and photometric calibration of the comet observations. These data were migrated from the PDS3 dataset DI/EAR-C-I0046-2-IRTF-NIRIMG-TMPL1-V1.0. -
collection:
DES_Asteroid_taxonomy V1.0
Inventory of the data collection for the DES Asteroid Taxonomy Bundle V1.0 -
collection:
data collection for the "POLARIMETRY OF PLANETARY SATELLITES " bundle
This is the data collection for the compil.satellite.polarimetry bundle. This compilation of polarimetry of planetary satellites has been compiled from the published literature and from unpublished results by Zaitsev, Rosenbush, and Kiselev. Geometric observational circumstances, calculated using the JPL Horizons ephemeris system, are also included. This version of the compilation is dated April 15, 2012. -
collection:
Hale-Bopp Visual Lightcurve
This dataset contains visual magnitudes of comet C/1995 O1 (Hale-Bopp) that were obtained from the International Comet Quarterly and processed to provide a secular lightcurve from -7 au (pre-perihelion) to +8 au (post-perihelion). The original apparent magnitudes from 17 observers were corrected for geocentric distance and phase angle, and then combined in a systematic way that yielded a self-consistent consensus fit. In analyzing visual data from multiple observers, the questions inevitably arise of which data to reject, and under what justification, and whether combining data from observers, each with their own systematic errors, leads to a biased result. Without instrumental calibration, there is no certain answer to these questions, and such calibration is not available for the observations discussed here. We estimated the shifts with a self-consistent statistical approach, leading to a sharper light curve and improving the precision of the measured slopes. The dataset includes the original apparent magnitudes, those corrected for geocentric distance and phase angle, and the final shifted and weighted values. The final secular lightcurve is the best produced to date for comet Hale-Bopp. -
collection:
data collection for the "FORNASIER SPECTRA OF M ASTEROIDS" bundle
This is the data collection for the gbo.ast-m-type.fornasier.spectra bundle. This data set contains reduced composite visual and near-infrared spectra of thirty M-type asteroids, observed over the years 2004-2008 and presented in Fornasier et al. (2010). The spectra were taken with the Dolores and NICS instruments at the Telescopio Nationale Galileo (TNG) in La Palma, with the EMMI and SOFI instruments at the ESO New Technology Telescope (NTT) in Chile, and with the SPeX instrument at the Infrared Telescope Facility (IRTF) in Hawaii. The individual spectra from the various instruments used to produce the composite spectra are also included.
Data Sets and Information