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Astrophysics > Earth and Planetary Astrophysics

arXiv:1707.04066v1 (astro-ph)
[Submitted on 13 Jul 2017]

Title:The size distribution of Near Earth Objects larger than 10 meters

Authors:D. E. Trilling, F. Valdes, L. Allen, D. James, C. Fuentes, D. Herrera, T. Axelrod, J. Rajagopal
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Abstract: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-meter 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 meters. We find that there are 10^6.6 NEOs larger than 10 meters. This result implies a factor of ten fewer small NEOs than some previous results, though our derived size distribution is in good agreement with several other estimates.
Comments: AJ in press
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:1707.04066 [astro-ph.EP]
  (or arXiv:1707.04066v1 [astro-ph.EP] for this version)
  https://doi.org/10.48550/arXiv.1707.04066
Related DOI: https://doi.org/10.3847/1538-3881/aa8036

Submission history

From: David E. Trilling [view email]
[v1] Thu, 13 Jul 2017 11:13:57 UTC (1,995 KB)
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