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Title: NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos

Abstract

The Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) reactivation mission has completed its third year of surveying the sky in the thermal infrared for near-Earth asteroids and comets. NEOWISE collects simultaneous observations at 3.4 and 4.6  μ m of solar system objects passing through its field of regard. These data allow for the determination of total thermal emission from bodies in the inner solar system, and thus the sizes of these objects. In this paper, we present thermal model fits of asteroid diameters for 170 NEOs and 6110 Main Belt asteroids (MBAs) detected during the third year of the survey, as well as the associated optical geometric albedos. We compare our results with previous thermal model results from NEOWISE for overlapping sample sets, as well as diameters determined through other independent methods, and find that our diameter measurements for NEOs agree to within 26% (1 σ ) of previously measured values. Diameters for the MBAs are within 17% (1 σ ). This brings the total number of unique near-Earth objects characterized by the NEOWISE survey to 541, surpassing the number observed during the fully cryogenic mission in 2010.

Authors:
; ;  [1]; ;  [2];  [3];  [4]; ;  [5]
  1. Jet Propulsion Laboratory/California Institute of Technology, 4800 Oak Grove Drive, MS 183-301, Pasadena, CA 91109 (United States)
  2. California Institute of Technology, Infrared Processing and Analysis Center, 1200 California Boulevard, Pasadena, CA 91125 (United States)
  3. University of California, Los Angeles, CA 90095 (United States)
  4. University of Maryland, College Park, MD 20742 (United States)
  5. Planetary Science Institute, 1700 E Fort Lowell Road #106, Tucson, AZ 85719 (United States)
Publication Date:
OSTI Identifier:
22663137
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (Online); Journal Volume: 154; Journal Issue: 4; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ALBEDO; ASTEROIDS; COMETS; COMPARATIVE EVALUATIONS; CRYOGENICS; EMISSION; INFRARED SURVEYS; PLANETS; REGENERATION; SKY; SOLAR SYSTEM

Citation Formats

Masiero, Joseph R., Mainzer, A. K., Kramer, E., Nugent, C., Cutri, R. M., Wright, E. L., Bauer, J. M., Grav, T., and Sonnett, S., E-mail: Joseph.Masiero@jpl.nasa.gov. NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos. United States: N. p., 2017. Web. doi:10.3847/1538-3881/AA89EC.
Masiero, Joseph R., Mainzer, A. K., Kramer, E., Nugent, C., Cutri, R. M., Wright, E. L., Bauer, J. M., Grav, T., & Sonnett, S., E-mail: Joseph.Masiero@jpl.nasa.gov. NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos. United States. doi:10.3847/1538-3881/AA89EC.
Masiero, Joseph R., Mainzer, A. K., Kramer, E., Nugent, C., Cutri, R. M., Wright, E. L., Bauer, J. M., Grav, T., and Sonnett, S., E-mail: Joseph.Masiero@jpl.nasa.gov. Sun . "NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos". United States. doi:10.3847/1538-3881/AA89EC.
@article{osti_22663137,
title = {NEOWISE Reactivation Mission Year Three: Asteroid Diameters and Albedos},
author = {Masiero, Joseph R. and Mainzer, A. K. and Kramer, E. and Nugent, C. and Cutri, R. M. and Wright, E. L. and Bauer, J. M. and Grav, T. and Sonnett, S., E-mail: Joseph.Masiero@jpl.nasa.gov},
abstractNote = {The Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) reactivation mission has completed its third year of surveying the sky in the thermal infrared for near-Earth asteroids and comets. NEOWISE collects simultaneous observations at 3.4 and 4.6  μ m of solar system objects passing through its field of regard. These data allow for the determination of total thermal emission from bodies in the inner solar system, and thus the sizes of these objects. In this paper, we present thermal model fits of asteroid diameters for 170 NEOs and 6110 Main Belt asteroids (MBAs) detected during the third year of the survey, as well as the associated optical geometric albedos. We compare our results with previous thermal model results from NEOWISE for overlapping sample sets, as well as diameters determined through other independent methods, and find that our diameter measurements for NEOs agree to within 26% (1 σ ) of previously measured values. Diameters for the MBAs are within 17% (1 σ ). This brings the total number of unique near-Earth objects characterized by the NEOWISE survey to 541, surpassing the number observed during the fully cryogenic mission in 2010.},
doi = {10.3847/1538-3881/AA89EC},
journal = {Astronomical Journal (Online)},
number = 4,
volume = 154,
place = {United States},
year = {Sun Oct 01 00:00:00 EDT 2017},
month = {Sun Oct 01 00:00:00 EDT 2017}
}