Data Set Information
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| DATA_SET_NAME |
WHITELEY NEO PHOTOMETRY V1.0
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| DATA_SET_ID |
EAR-A-I0034-3-WHITELEY-PHOT-V1.0
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| NSSDC_DATA_SET_ID |
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| DATA_SET_TERSE_DESCRIPTION |
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| DATA_SET_DESCRIPTION |
Data Set Overview : This data set includes the ECAS system (Eight Color Asteroid Survey) photometry and taxonomic types of 77 Near Earth Objects published by R.J. Whiteley in his thesis (Whiteley, 2001. A compositional and dynamical survey of the near-earth asteroids. Ph.D. thesis, University of Hawaii). [WHITELEY2001] The ECAS system is established in Zellner et al. 1985, Icarus 61, 355-416 [ZELLNERETAL1985]. The original ECAS survey is available in PDS as data set EAR-A-2CP-3-RDR-ECAS-V3.0. The data presented here are new measurements based on the ECAS system. Data : Data include five ECAS colors, with errors, for each of the 77 NEOs. Also included is the taxonomic type for each object, generated from the presented ECAS colors using principal component analysis. Since the details of the observations are published in a thesis, which may not be accessible to all users, some details of the observations are included here. Observations were obtained at the University of Hawaii 2.24m telescope between August 1996 and March 2000. All observations were conducted at the rate of motion of the targets, and most observations were conducted between 1.0 and 1.8 airmasses. The typical observing sequence for an asteroid was to observe in sequence through the bwxpu filters, interspersing observations through the v filter every 5 to 10 minutes. The result was a series of 16 to 20 photometric observations, 2 each through the bwxpu filters, and 6 to 10 observations through the v filter. The repeated observations through the v filter allowed modelling to minimize the effects of the asteroid's lightcurve. Each of the six filters was calibrated by observing the standard stars defined for and used during the ECAS survey. Adequate calibration data were taken so that each individual night's data could be independently calibrated, although in practice the calibration coefficients were stable over the course of a 2 or 3 night run. Ancillary Data : The ECAS filter bandpasses and response curves have been included in this data set. These files are identical to the filter bandpass and response curve files in the ECAS data set (PDS data set ID EAR-A-2CP-3- RDR-ECAS-V3.0).
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| DATA_SET_RELEASE_DATE |
2004-05-20T00:00:00.000Z
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| START_TIME |
1996-02-15T12:00:00.000Z
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| STOP_TIME |
2000-07-28T12:00:00.000Z
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| MISSION_NAME |
SUPPORT ARCHIVES
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| MISSION_START_DATE |
2004-03-22T12:00:00.000Z
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| MISSION_STOP_DATE |
N/A (ongoing)
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| TARGET_NAME |
ASTEROID
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| TARGET_TYPE |
ASTEROID
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| INSTRUMENT_HOST_ID |
OBS376T1
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| INSTRUMENT_NAME |
UH TEKTRONIX 2K CCD
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| INSTRUMENT_ID |
I0034
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| INSTRUMENT_TYPE |
IMAGER
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| NODE_NAME |
Small Bodies
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| ARCHIVE_STATUS |
ARCHIVED
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| CONFIDENCE_LEVEL_NOTE |
Review : This data set underwent external peer review on May 20, 2004.
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| CITATION_DESCRIPTION |
Whiteley, R.J., ECAS Photometry of NEOs V1.0. EAR-A-I0034-3-WHITELEY-PHOT-V1.0, NASA Planetary Data System, 2004.
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| ABSTRACT_TEXT |
This data set includes ECAS photometry and taxonomic types of 77 Near Earth Objects published by R.J. Whiteley.
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| PRODUCER_FULL_NAME |
CAROL NEESE
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| SEARCH/ACCESS DATA |
SBN PSI WEBSITE
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