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Ida/Gaspra Groundbased Lightcurves V1.0 (PDS)

NSSDCA ID: PSSB-00282

Availability: Archived at NSSDC, accessible from elsewhere

Description

This description was generated automatically using input from the Planetary Data System.

Data Set Overview ================= The Asteroid Photometric Catalog (3rd update) is a compilation of all asteroid lightcurve photometry published up to and including the year 1992. This data set includes the Ida and Gaspra lightcurves in the APC 3rd update, plus some data published since the 3rd update and some unpublished lightcurves of Ida and Gaspra, with permission of the investigators. Parameters ========== The primary data file of this data set, named iglcapc.dat, has an entry for each photometric observation of an asteroid included in any asteroid lightcurve. The parameters given for each observation include julian date of the observation, the observed magnitude, and the error value associated with the magnitude. The index to this primary file, named iglcindx.tab, contains an entry for each asteroid lightcurve and refers to the individual photometric observations given in iglcapc.dat. Each entry identifies the asteroid, and specifies the filter used, the start and stop time of the lightcurve observation, the heliocentric distance, geocentric distance, phase angle, and geocentric ecliptic longitude and latitude of the asteroid at the time of the observation, the start byte and observation set size of the lightcurve in iglcapc.dat, a code for the original published reference reporting the observations, and a code for each comment line. The file iglcrefs.tab contains an entry for each published reference from which data is included in the data set, along with the reference code by which it is cited in iglcindx.tab. The file iglcinfo.tab contains an entry for each comment line with a code number by which it is referred to in iglcindx.tab. Processing ========== No processing has been applied to the photometric data. Additional information for each observation, such as phase angle, has been determined. Data ==== This data set includes the following data objects. iglcapc.dat - binary table of photometric measurements. iglcindx.tab - ASCII table of lightcurves which serves as an index to igapc.dat. iglcrefs.tab - ASCII table of published references. iglcinfo.tab - ASCII table of comment lines. Ancillary Data ============== Of the data objects listed above, iglcrefs.tab and iglcinfo.tab may be considered ancillary data. Media/Format ============ This data set is released in the form of ASCII and binary files which may be stored on disk or other magnetic medium and which may be distributed by ftp, email, real-time access by remote login, or by whatever means is most convenient. Dataset Overview ================ This dataset contains data acquired by the Galileo Magnetometer during the Gaspra flyby on Oct 29, 1991. It includes browse data, high-resolution data in both spacecraft and Gaspra-centric coordinates and trajectory data. A sample of cruise phase data around the time of encounter has also been included to provide a context for the encounter data. Note that the START_TIME and STOP_TIME above refer to the encounter period. The ancillary cruise data cover an additional several weeks before and after the encounter period. Primary Dataset Reference: Kivelson, M. G., L. F. Bargatze, K. K. Khurana, D. J. Southwood, R. J. Walker, P. J. Coleman, Magnetic Field Signatures Near Galileos Closest Approach to Gaspra, Science, Vol. 261, p331-334, 16 July, 1993. Primary Instrument Reference: Kivelson, M. G., K. K. Khurana, J. D. Means, C. T. Russell, and R. C. Snare, The Galileo magnetic field investigation, Space Science Reviews, 60, 1-4, 357, 1992. Parameters ========== The primary parameters provided in each data file are: browse Time, magnetic field components cruise Time, magnetic field components in RTN coordinates, spacecraft position and trajectory parameters hrsc Time, rotor parameters, magnetic field component in spacecraft coordinates hrgeoph Time, magnetic field components in Gaspra-SE, EME-50 and RTN coordinates traject Time, trajectory components in GASE coordinates, range and solar latitude and longitude Processing ========== These data were provided by the Galileo project to support the Ida/Gaspra observations. They have not been changed by SBN personnel, but neither have they been updated for any possible improvements in the mission data production pipeline. For the most recent version, please contact the Galileo Project. Data ==== For a detailed description of the data in each file, including acquisition, sampling and coordinate system notes, see the accompanying documentation files. Coordinate System ================= The data are provided relative to several different coordinate systems. See the accompanying documentation files for details. Media/Format ============ The data are being delivered on CDROM to the PDS archive and the National Space Science Data Center. Copies of all or part of this collection may also be available for downloading directly from the on-line archives of the Small Bodies Node. Dataset Overview ================ This dataset contains data acquired by the Galileo Magnetometer during the Ida flyby on Aug 28, 1993. It includes browse data, high-resolution data in both spacecraft and Ida-centric coordinates and trajectory data. A sample of cruise phase data around the time of encounter has also been included to provide a context for the encounter data. Note that the START_TIME and STOP_TIME above refer to the encounter period. The ancillary cruise data cover an additional several weeks before and after the encounter period. Primary Dataset Reference: Kivelson, M.G., Z. Wang, S. Joy, K.K. Khurana, C. Polanskey, D.J. Southwood, and R.J. Walker, Solar Wind Interactions with Small Bodies: 2. What Can Galileos Detection of Magnetic Rotations Tell Us About GASPRA and IDA, Advances in Space Research, 1994 Primary Instrument Reference: Kivelson, M. G., K. K. Khurana, J. D. Means, C. T. Russell, and R. C. Snare, The Galileo magnetic field investigation, Space Science Reviews, 60, 1-4, 357, 1992. Parameters ========== The primary parameters provided in each data file are: browse Time, magnetic field components cruise Time, magnetic field components in RTN coordinates, spacecraft position and trajectory parameters hrsc Time, rotor parameters, magnetic field component in spacecraft coordinates hrgeoph Time, magnetic field components in Gaspra-SE, EME-50 and RTN coordinates traject Time, trajectory components in GASE coordinates, range and solar latitude and longitude Processing ========== These data were provided by the Galileo project to support the Ida/Gaspra observations. They have not been changed by SBN personnel, but neither have they been updated for any possible improvements in the mission data production pipeline. For the most recent version, please contact the Galileo Project. Data ==== For a detailed description of the data in each file, including acquisition, sampling and coordinate system notes, see the accompanying documentation files. Coordinate System ================= The data are provided relative to several different coordinate systems. See the accompanying documentation files for details. Media/Format ============ The data are being delivered on CDROM to the PDS archive and the National Space Science Data Center. Copies of all or part of this collection may also be available for downloading directly from the on-line archives of the Small Bodies Node. Data Set Overview ================= This data set is intended to include all published spectra of the asteroids (243) Ida and (951) Gaspra. These have been gathered from existing PDS data sets archive data sets. Four spectra of Gaspra and two of Ida are included. The 24-Color Survey spectrum of 243 Ida has not been included in this collection, since for practical purposes the 24-color survey has been superseded by subsequent surveys such as ECAS and SMASS. The full 24-Color Survey is available in the PDS main archive. Data ==== The data are included in the following files: ecasida.tab - ECAS spectrum of Ida, from Zellner et al. (1985) smassida.tab - SMASS spectra of Ida, from Xu et al. (1995) ecasgaspra.tab - ECAS spectrum of Gaspra, from Zellner et al. (1985) smassgaspra.tab - SMASS spectra of Gaspra, from Xu et al. (1995) irgaspra.tab - IR spectrum of Gaspra, from Goldader et al. (1991) scasgaspra.tab - SCAS spectrum of Gaspra, from Clark et al. (1995) Data Set Overview ================= This dataset includes the Galileo Orbiter Solid State Imaging data on the asteroids 243 Ida and 951 Gaspra. These data have already been archived in PDS under the dataset GO-A/E-SSI-2-REDR-V1.0 and are reproduced here for convenient access to those users specifically concerned with 243 Ida and 951 Gaspra. Only those images in which Gaspra, Ida, or Idas moon Dactyl actually appear have been included here. The originally released VICAR-format images have been converted to FITS format. Some ancillary information including the image prefix bytes, the telemetry table, and the bad data values header have been stripped from the original VICAR images and are not included here. Those who need these ancillary data can obtain them from the original data release. As an aid in selecting the desired images, an index to the images is provided, giving image time, filter, exposure time, gain state, time from closest approach, resolution, distance to the asteroid, the sub-spacecraft latitude and longitude, and other parameters. Processing ========== These images have been converted from VICAR format to FITS format using the image reduction package IRAF. The image prefix tables, telemetry tables, and bad data value headers have been removed from the images. All relevant label keywords describing the image have been retained in the image labels. Data ==== The data are included in a series of files with filenames of the form Xnnnn.FTS. X is a letter A through I referring to SPACECRAFT_CLOCK_START_COUNT as follows: first 6 digits of SPACECRAFT_CLOCK_START_COUNT: A 010727 B 010728 C 010729 D 010730 E 010731 F 020253 G 020254 H 020255 I 020256 and nnnn are the last four digits of the SPACECRAFT_CLOCK_START_COUNT. Images beginning with A - E contain Gaspra, and those beginning with F - I contain Ida and/or Dactyl. Ancillary Data ============== As an aid in selecting particular images of interest, a number of parameters pertaining to each image are displayed with the list of images. In addition, the originally released indices to the Ida and Gaspra images are also included. These are idaindex.tab and gasindex.tab. Entries are retained only for those images in which Ida, Dactyl, or Gaspra appear. All the fields listed in the originally released indices are retained, except that the file specification has been changed to refer to the files in the Ida/Gaspra collection. Media/Format ============ This dataset is made available for browsing or downloading on the WWW site at http://pdssbn.astro.umd.edu/review. This web site will be maintained for a limited period of time in support of NASA supported data analysis programs, and then the data will be recorded to a more permanent medium for distribution. These data are available on-line from the Planetary Data System (PDS) at: http://sbn.psi.edu/pds/archive/idagaspra/sbnig_0001/

Alternate Names

  • EAR-A-3-EDC-IDA/GASPRA-APC/LC-V1.0
  • EAR-A-3-EDC-IDA/GASPRA-SPECTRA-V1.0
  • GO-A-MAG/POS-3-RDR/SUMM/TRAJ-GASPRA-V1.0
  • GO-A-MAG/POS-3-RDR/SUMM/TRAJ-IDA-V1.0
  • GO-A-SSI-2-REDR-IDA/GASPRA-V1.0
  • GASPRA GALILEO MAGNETOMETER/TRAJECTORY DATA V1.0 (PDS)
  • Galileo SSI Ida/Gaspra Images V1.0 (PDS)
  • IDA GALILEO MAGNETOMETER/TRAJECTORY DATA V1.0 (PDS)
  • Ida and Gaspra Groundbased Spectra V1.0 (PDS)

Discipline

  • Planetary Science: Small Bodies

Additional Information

Spacecraft

Experiments

Questions and comments about this data collection can be directed to: Dr. Edwin V. Bell, II

 

Personnel

NameRoleOriginal AffiliationE-mail
Dr. Michael J.S. BeltonData ProviderKitt Peak National Observatorybelton@jupiter.noao.edu
Dr. Margaret Galland KivelsonGeneral ContactUniversity of California, Los Angelesmkevelson@igpp.ucla.edu
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