Data Set Information
DATA_SET_NAME DELBO THERMAL INFRARED ASTEROID DIAMETERS AND ALBEDOS V1.0
DATA_SET_ID EAR-A-KECK1LWS/ETAL-5-DELBO-V1.0
NSSDC_DATA_SET_ID
DATA_SET_TERSE_DESCRIPTION
DATA_SET_DESCRIPTION Data Set Overview : An extended set of new thermal infrared observations of NEOs in the range between 5 and 25 microns was obtained during the years 2000-2003 by Marco Delbo, Alan W. Harris, Rick Binzel, Bobby Bus, Michael Mueller, and Mario Di Martino. These observations, on which Marco Delbo's Ph.D. dissertation is based, were used to derive radiometric albedos and diameters using three different thermal models. The results are reported in Delbo (2004), Delbo et al. (2003), and Harris et al. (2003). The data set includes 32 asteroids. The observations were carried out at three different telescopes as follows: - Keck-1 telescope on Mauna Kea, Hawaii, using the Long Wavelength Spectrograph (LWS) - ESO 3.6m telescope at La Silla, Chile, using the Thermal Infrared Multi-Mode Instrument (TIMMI2) - The NASA Infrared Telescope Facilty (IRTF) on Mauna Kea, using the MIRSI Mid-Infrared Spectrometer for observations of asteroid 35386 (1997 XF11), and using the MIRLIN Mid-Infrared Large-Well Imager for all other asteroids. The resulting infrared fluxes reported in Appendix A of Delbo (2004) are included here in the file 'fluxes.tab'. These infrared observations were used to derive diameters and albedos using three different thermal models, the Standard Thermal Model (STM, see Lebofsky and Spencer 1989), the Fast Rotating Model (FRM, see Lebofsky and Spencer 1989), and the Near Earth Asteroid Thermal Model (NEATM, see Harris 1989). The resulting diameters and albedos, reported in Tables 4.2.1, 4.2.2, and 4.2.3 in Delbo (2004) are included here in the file 'diamalb.tab'. This file also includes the applicable date of observation and phase angle extracted from Tables 3.11.1, 3.11.2, and 3.11.3 of Delbo (2004). The error bars shown in the file 'diamalb.tab' represent a reanalysis of the errors done by Delbo in 2006. References: Delbo, M., The nature of near-earth asteroids from the study of their thermal infrared emission, Ph.D. thesis, Freie Universitat Berlin, 2004. [DELBO2004] Delbo, M., A.W. Harris, R.P. Binzel, P. Pravec, and J.K. Davies, Keck observations of near-earth asteroids in the thermal infrared, Icarus 166, 116-130, 2003. [DELBOETAL2003] Harris, A.W., M. Mueller, M. Delbo, and S.J. Bus, The surface properties of small asteroids: Peculiar Betulia - A case study, Icarus 179, 95-108, 2005. [HARRISETAL2005] Harris, A.W. and J.S.V. Lagerros, Asteroids in the thermal infrared, in 'Asteroids III', Bottke, W., A. Cellino, P. Paolicci, and R.P. Binzel, Eds., University of Arizona Press, Tucson, pp. 205-218, 2002. [HARRIS&LAGERROS2002] Harris, A.W., A thermal model for near-Earth asteroids, Icarus 131, 291-301, 1998. [HARRIS1998] Lebofsky, L.A. and J.R. Spencer, Radiometry and thermal modeling of asteroids, In 'Asteroids II', Binzel, R.P., T. Gehrels, and M.S. Matthews, Eds., University of Arizona Press, Tucson, pp. 128-147, 1989. [LEBOFSKY&SPENCER1989] Mueller, M., A.W. Harris, M. Delbo, and S.J. Bus, The sizes and albedos of near-earth asteroids, including 6489 Golevka, from recent IRTF observations, American Astronomical Society, DPS meeting #35, #22.04, Bulletin of the American Astronomical Society, Vol. 35, p. 955, 2003. [MUELLERETAL2003]
DATA_SET_RELEASE_DATE 2006-05-25T00:00:00.000Z
START_TIME 2000-03-16T12:00:00.000Z
STOP_TIME 2003-06-03T12:00:00.000Z
MISSION_NAME SUPPORT ARCHIVES
MISSION_START_DATE 2004-03-22T12:00:00.000Z
MISSION_STOP_DATE N/A (ongoing)
TARGET_NAME ASTEROID
TARGET_TYPE ASTEROID
INSTRUMENT_HOST_ID KECK1
OBS056T6
OBS376T3
INSTRUMENT_NAME THERMAL INFRARED MULTI-MODE INSTRUMENT 2
JPL MID-INFRARED LARGE-WELL IMAGER
MIRSI - MID-INFRARED SPECTROMETER AND IMAGER
KECK I LONG WAVELENGTH SPECTROGRAPH (IR)
INSTRUMENT_ID I0069
I0070
I0071
KECK1LWS
INSTRUMENT_TYPE CAMERA
IMAGING SPECTROMETER
NODE_NAME Small Bodies
ARCHIVE_STATUS ARCHIVED
CONFIDENCE_LEVEL_NOTE Confidence Level Overview : The quoted uncertainties in the diameters and albedos derived from the three thermal models refer to the statistical uncertainties in the flux measurements. For discussion of the model uncertainties and sources of error see the original publications, Delbo (2004), Harris (1989), and Harris and Lagerros (2002). Note: The MIRLIN instrument was known to have readout problems during the period of time covered by the observations. However the observed objects were all sufficiently bright that the results were unaffected.
CITATION_DESCRIPTION Delbo, M., Delbo Thermal Infrared Asteroid Diameters and Albedos V1.0. EAR-A-KECK1LWS/ETAL-5-DELBO-V1.0. NASA Planetary Data System, 2006.
ABSTRACT_TEXT 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.
PRODUCER_FULL_NAME CAROL NEESE
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