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The Population of Tiny Near-Earth Objects Observed by NEOWISE

Mainzer, A. and Bauer, J. and Grav, T. and Masiero, J. and Cutri, R. M. and Wright, E. and Nugent, C. R. and Stevenson, R. and Clyne, E. and Cukrov, G. and Masci, F. (2014) The Population of Tiny Near-Earth Objects Observed by NEOWISE. Astrophysical Journal, 784 (2). Art. No. 110. ISSN 0004-637X. https://resolver.caltech.edu/CaltechAUTHORS:20140606-105149586

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Abstract

Only a very small fraction of the asteroid population at size scales comparable to the object that exploded over Chelyabinsk, Russia has been discovered to date, and physical properties are poorly characterized. We present previously unreported detections of 105 close approaching near-Earth objects (NEOs) by the Wide-field Infrared Survey Explorer (WISE) mission's NEOWISE project. These infrared observations constrain physical properties such as diameter and albedo for these objects, many of which are found to be smaller than 100 m. Because these objects are intrinsically faint, they were detected by WISE during very close approaches to the Earth, often at large apparent on-sky velocities. We observe a trend of increasing albedo with decreasing size, but as this sample of NEOs was discovered by visible light surveys, it is likely that selection biases against finding small, dark NEOs influence this finding.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://arxiv.org/abs/1310.2980arXivDiscussion Paper
http://dx.doi.org/10.1088/0004-637X/784/2/110DOIArticle
http://iopscience.iop.org/0004-637X/784/2/110PublisherArticle
ORCID:
AuthorORCID
Grav, T. 0000-0002-3379-0534
Masiero, J.0000-0003-2638-720X
Cutri, R. M.0000-0002-0077-2305
Wright, E.0000-0001-5058-1593
Masci, F.0000-0002-8532-9395
Additional Information:© 2014 The American Astronomical Society. Received 2013 July 26; accepted 2013 October 10; published 2014 March 12. This publication makes use of data products from the Widefield Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This publication also makes use of data products from NEOWISE, which is a project of the Jet Propulsion Laboratory/California Institute of Technology, funded by the Planetary Science Division of the National Aeronautics and Space Administration. We thank our referee, Dr. Alan Harris of Pasadena, for his helpful comments that materially improved this manuscript. We gratefully acknowledge the extraordinary services specific to NEOWISE contributed by the International Astronomical Union’s Minor Planet Center, operated by the Harvard-Smithsonian Center for Astrophysics, and the Central Bureau for Astronomical Telegrams, operated by Harvard University. We also thank the worldwide community of dedicated amateur and professional astronomers devoted to minor planet follow-up observations. This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration.
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
NASA/JPL/CaltechUNSPECIFIED
Subject Keywords: atlases; catalogs; infrared: general; minor planets, asteroids: general; surveys
Issue or Number:2
Record Number:CaltechAUTHORS:20140606-105149586
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140606-105149586
Official Citation:The Population of Tiny Near-Earth Objects Observed by NEOWISE A. Mainzer et al. 2014 ApJ 784 110
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46123
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:06 Jun 2014 18:17
Last Modified:03 Oct 2019 06:41

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