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The Size Distribution of Near-Earth Objects Larger Than 10 m
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We analyzed data from the first year of a survey for Near-Earth Objects (NEOs) that we are carrying out with the Dark Energy Camera (DECam) on the 4 m Blanco telescope at the Cerro Tololo Inter-American Observatory. We implanted synthetic NEOs into the data stream to derive our nightly detection efficiency as a function of magnitude and rate of motion. Using these measured efficiencies and the solar system absolute magnitudes derived by the Minor Planet Center for the 1377 measurements of 235 unique NEOs detected, we directly derive, for the first time from a single observational data set, the NEO size distribution from 1 km down to 10 m. We find that there are NEOs larger than 10 m. This result implies a factor of 10 fewer small NEOs than some previous results, though our derived size distribution is in good agreement with several other estimates.
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The only measured size distribution in this size range in the solar system is for the near-Earth object population; a factor of three in size corresponds roughly to a factor of five in number of objects.
“The only measured size distribution in this size range in our solar system is for the near-Earth object population; a factor of three in size corresponds roughly to a factor of five in number of objects (Trilling et al. 2017).”
From Implications for Planetary System Formation from Interstellar Object 1I/2017 U1 (‘Oumuamua) (2017) · cites this paper as Trilling et al. 2017
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- JeongAhn, 2016, in AAS/DPS Meeting 48 Abstract, 215.07
- Spurný, 2017, A&A
- Trilling, 2017, AJ
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Metadata
- Authors
- Trilling, D. E., Valdes, F., Allen, L., James, D., Fuentes, C., Herrera, D., Axelrod, T., & Rajagopal, J.
- Affiliations
- Northern Arizona University (US)
- NSF NOIRLab (US)
- Cerro Tololo Inter-American Observatory (CL)
- University of Chile (CL)
- University of Arizona (US)
- Corresponding author
- Trilling, D. E.
- James, D.
- Herrera, D.
- Venue
- The Astronomical Journal
- Publisher
- American Astronomical Society
- Published
- 2017-09-29
- Volume
- 154
- Issue
- 4
- Pages
- 170
- ISSN
- 0004-6256 (ISSN-L)
- 1538-3881
- OpenAlex
- W2734482436
- Cited by
- 31
- References
- 16
- Citations by year
- 2025: 2 · 2024: 2 · 2023: 2 · 2022: 1 · 2021: 5 · 2020: 5 · 2019: 7 · 2018: 5 · 2017: 2
- FWCI
- 2.84
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- The Astronomical Journal (publishedVersion)
- UA Campus Repository (The University of Arizona) (acceptedVersion)
- arXiv (Cornell University) (submittedVersion)
- Universidad de Chile (submittedVersion, cc-by-nc-nd)
- arXiv (Cornell University)
- Funders
- National Science Foundation
- U.S. Department of Energy
- National Aeronautics and Space Administration (NNX12AG13G)
- University of Pennsylvania
- Ohio State University
- University of Chicago
- University of Portsmouth
- University College London
- University of Sussex
- Deutsche Forschungsgemeinschaft
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- Financiadora de Estudos e Projetos
- Institut de Física d'Altes Energies
- University of Illinois at Urbana-Champaign
- Science and Technology Facilities Council
- Integrated Electronics Engineering Center, Binghamton University
- Argonne National Laboratory
- Fermilab
- Lawrence Berkeley National Laboratory
- SLAC National Accelerator Laboratory
- Topics
- Physical Sciences › Earth and Planetary Sciences › Space and Planetary Science › Astro and Planetary Science
- Physical Sciences › Engineering › Aerospace Engineering › Space Satellite Systems and Control
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Keywords
- near-Earth objects, size distribution, absolute magnitude, Dark Energy Camera, small asteroids, asteroid survey
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