Data Set Information
DATA_SET_NAME ASTEROID OCCULTATIONS V5.0
DATA_SET_ID EAR-A-3-RDR-OCCULTATIONS-V5.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview : This data set is intended to include all reported timings of observed asteroid occultation events, as well as asteroid axes derived from those timings by David W. Dunham and David Herald. Most of these timings are unpublished and have been collected by Dunham and Herald. This version is complete through the end of 2006 and contains additional events from 2007. The asteroid sizes (major and minor axes) derived from the occultation timing data are the result of an analysis program by Dunham and Herald, applied consistently to all the occultation events. Data : The asteroid occultation timing data are collected into two files. The occlist file lists a total of 1055 occultations, one occultation per line, along with the identification of the asteroid and star, and additional information about the star including RA and dec. These lines also include the major and minor axes derived from the timings for that occultation, if any, along with information about the analysis. The list is chronological, with an occultation ID assigned to each one. The occtimings file lists the individual timings measured for each occultation, with one disappearance and reappearance per line, as well as information about the observing site and the observational circumstances. The latitude, longitude, and elevation of each site are included. Two analogous files, occsatlist and occsattime, with occultation data on planetary satellites, are also included. Ancillary Data : Summary files, occsummary.tab and occsatsummary.tab, contain the major and minor axes and position angles from the elliptical or circular fits, extracted from occlist and occsatlist respectively. Modification History : The first version of this data set, introduced in 2003, included occultations only through 1998. The update of 2004 not only adds occultations through March 1, 2004, but also provides a more systematic arrangement of the data. The data set was again updated in 2005 and 2006 with the addition of more occultation events through Apr. 11, 2006. The 2007 version is complete through 2006 with additional events from 2007.
DATA_SET_RELEASE_DATE 2007-05-24T00:00:00.000Z
START_TIME 1958-02-19T12:00:00.000Z
STOP_TIME 2007-05-09T12:00:00.000Z
MISSION_NAME SUPPORT ARCHIVES
MISSION_START_DATE 2004-03-22T12:00:00.000Z
MISSION_STOP_DATE N/A (ongoing)
TARGET_NAME ASTEROID
SATELLITE
TARGET_TYPE ASTEROID
SATELLITE
INSTRUMENT_HOST_ID VARGBTEL
INSTRUMENT_NAME VARIOUS GROUND-BASED DETECTORS
INSTRUMENT_ID VARGBDET
INSTRUMENT_TYPE UNKNOWN
NODE_NAME Small Bodies
ARCHIVE_STATUS SUPERSEDED
CONFIDENCE_LEVEL_NOTE Confidence Level Overview : This data set is compiled from the observations made by a large number of observers. Indications to the confidence level of each observation are included in the data files.
CITATION_DESCRIPTION Dunham, D. W. and Herald, D., Asteroid Occultations V5.0. EAR-A-3-RDR-OCCULTATIONS-V5.0. NASA Planetary Data System, 2007.
ABSTRACT_TEXT This data set is intended to include all reported timings of observed asteroid occultation events as well as asteroid occultation axes derived from those timings by David W. Dunham and David Herald. Some occultations by planetary satellites are also included. This version is complete through the end of 2006, and contains additional events from 2007.
PRODUCER_FULL_NAME CAROL NEESE
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