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Infrared Light Curves of Near-Earth Objects

Hora, J.L. and Siraj, A. and Mommert, M. and McNeill, A. and Trilling, D. and Gustafsson, A. and Smith, H. A. and Fazio, G.G. and Chesley, S. and Emery, J.P. and Harris, Alan and Mueller, M. (2018) Infrared Light Curves of Near-Earth Objects. The Astrophysical Journal, 238 (22), pp. 1-12. American Astronomical Society. doi: 10.3847/1538-4365/aadcf5. ISSN 0004-637X.

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We present light curves and derive periods and amplitudes for a subset of 38 near-Earth objects (NEOs) observed at 4.5 µm with the IRAC camera on the the Spitzer Space Telescope, many of them having no previously reported rotation periods. This subset was chosen from about 1800 IRAC NEO observations as having obvious periodicity and significant amplitude. For objects where the period observed did not sample the full rotational period, we derived lower limits to these parameters based on sinusoidal fits. Light curve durations ranged from 42 to 544 minutes, with derived periods from 16 to 270 minutes. We discuss the effects of light curve variations on the thermal modeling used to derive diameters and albedos from Spitzer photometry. We find that both diameters and albedos derived from the light curve maxima and minima agree with our previously published results, even for extreme objects, showing the conservative nature of the thermal model uncertainties. We also evaluate the NEO rotation rates, sizes, and their cohesive strengths.

Item URL in elib:https://elib.dlr.de/122191/
Document Type:Article
Title:Infrared Light Curves of Near-Earth Objects
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hora, J.L.Harvard-Smithsonian Center for Astrophysics, MA 02138-1516, USAhttps://orcid.org/0000-0002-5599-4650
Siraj, A.Harvard University, Cambridge, MA,02138, USAUNSPECIFIED
Mommert, M.Northern Arizona University, PO Box 6010, Flagstaff, AZ 86011, USAhttps://orcid.org/0000-0002-8132-778X
McNeill, A.Northern Arizona University, PO Box 6010, Flagstaff, AZ 86011, USAUNSPECIFIED
Trilling, D.Northern Arizona University, PO Box 6010, Flagstaff, AZ 86011, USAhttps://orcid.org/0000-0003-4580-3790
Gustafsson, A.Northern Arizona University, PO Box 6010, Flagstaff, AZ 86011, USAUNSPECIFIED
Smith, H. A.Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-65, Cambridge, MA 02138, USAUNSPECIFIED
Fazio, G.G.Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138-1516, USAhttps://orcid.org/0000-0002-0670-0708
Chesley, S.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USAhttps://orcid.org/0000-0003-3240-6497
Emery, J.P.Department of Earth and Planetary Sciences, University of Tennessee, TN 37996, USAUNSPECIFIED
Harris, AlanAlan.Harris (at) dlr.dehttps://orcid.org/0000-0001-8548-8268
Mueller, M.SRON, 9700 AV Groningen, The Netherlandshttps://orcid.org/0000-0003-3217-5385
Date:October 2018
Journal or Publication Title:The Astrophysical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.3847/1538-4365/aadcf5
Page Range:pp. 1-12
Publisher:American Astronomical Society
Keywords:infrared: planetary systems minor planets, asteroids: general - surveys
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Exploration of the Solar System
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Leitungsbereich PF
Deposited By: Harris, Prof. Alan
Deposited On:29 Oct 2018 10:23
Last Modified:06 Sep 2019 15:30

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