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Title: PRELIMINARY ANALYSIS OF WISE/NEOWISE 3-BAND CRYOGENIC AND POST-CRYOGENIC OBSERVATIONS OF MAIN BELT ASTEROIDS

Abstract

We present preliminary diameters and albedos for 13511 Main Belt asteroids (MBAs) that were observed during the 3-Band Cryo phase of the Wide-field Infrared Survey Explorer (WISE; after the outer cryogen tank was exhausted) and as part of the NEOWISE Post-Cryo Survey (after the inner cryogen tank was exhausted). With a reduced or complete loss of sensitivity in the two long wavelength channels of WISE, the uncertainty in our fitted diameters and albedos is increased to {approx}20% for diameter and {approx}40% for albedo. Diameter fits using only the 3.4 and 4.6 {mu}m channels are shown to be dependent on the literature optical H absolute magnitudes. These data allow us to increase the number of size estimates for large MBAs which have been identified as members of dynamical families. We present thermal fits for 14 asteroids previously identified as the parents of a dynamical family that were not observed during the fully cryogenic mission.

Authors:
; ; ;  [1];  [2];  [3];  [4]
  1. Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Dr., MS 321-520, Pasadena, CA 91109 (United States)
  2. Planetary Science Institute, Tucson, AZ 85719 (United States)
  3. Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125 (United States)
  4. Department of Earth and Space Sciences, University of California, Los Angeles, CA 90095 (United States)
Publication Date:
OSTI Identifier:
22078468
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 759; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ALBEDO; ASTEROIDS; CRYOGENIC FLUIDS; INFRARED SURVEYS; SENSITIVITY; TANKS; WAVELENGTHS

Citation Formats

Masiero, Joseph R., Mainzer, A. K., Bauer, J. M., Cabrera, M. S., Grav, T., Cutri, R. M., and Nugent, C., E-mail: Joseph.Masiero@jpl.nasa.gov. PRELIMINARY ANALYSIS OF WISE/NEOWISE 3-BAND CRYOGENIC AND POST-CRYOGENIC OBSERVATIONS OF MAIN BELT ASTEROIDS. United States: N. p., 2012. Web. doi:10.1088/2041-8205/759/1/L8.
Masiero, Joseph R., Mainzer, A. K., Bauer, J. M., Cabrera, M. S., Grav, T., Cutri, R. M., & Nugent, C., E-mail: Joseph.Masiero@jpl.nasa.gov. PRELIMINARY ANALYSIS OF WISE/NEOWISE 3-BAND CRYOGENIC AND POST-CRYOGENIC OBSERVATIONS OF MAIN BELT ASTEROIDS. United States. doi:10.1088/2041-8205/759/1/L8.
Masiero, Joseph R., Mainzer, A. K., Bauer, J. M., Cabrera, M. S., Grav, T., Cutri, R. M., and Nugent, C., E-mail: Joseph.Masiero@jpl.nasa.gov. Thu . "PRELIMINARY ANALYSIS OF WISE/NEOWISE 3-BAND CRYOGENIC AND POST-CRYOGENIC OBSERVATIONS OF MAIN BELT ASTEROIDS". United States. doi:10.1088/2041-8205/759/1/L8.
@article{osti_22078468,
title = {PRELIMINARY ANALYSIS OF WISE/NEOWISE 3-BAND CRYOGENIC AND POST-CRYOGENIC OBSERVATIONS OF MAIN BELT ASTEROIDS},
author = {Masiero, Joseph R. and Mainzer, A. K. and Bauer, J. M. and Cabrera, M. S. and Grav, T. and Cutri, R. M. and Nugent, C., E-mail: Joseph.Masiero@jpl.nasa.gov},
abstractNote = {We present preliminary diameters and albedos for 13511 Main Belt asteroids (MBAs) that were observed during the 3-Band Cryo phase of the Wide-field Infrared Survey Explorer (WISE; after the outer cryogen tank was exhausted) and as part of the NEOWISE Post-Cryo Survey (after the inner cryogen tank was exhausted). With a reduced or complete loss of sensitivity in the two long wavelength channels of WISE, the uncertainty in our fitted diameters and albedos is increased to {approx}20% for diameter and {approx}40% for albedo. Diameter fits using only the 3.4 and 4.6 {mu}m channels are shown to be dependent on the literature optical H absolute magnitudes. These data allow us to increase the number of size estimates for large MBAs which have been identified as members of dynamical families. We present thermal fits for 14 asteroids previously identified as the parents of a dynamical family that were not observed during the fully cryogenic mission.},
doi = {10.1088/2041-8205/759/1/L8},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 1,
volume = 759,
place = {United States},
year = {2012},
month = {11}
}