Affiliation:
1. Massachusetts Institute of Technology Lincoln Laboratory, 244 Wood Street, Room S4-571, Lexington, MA 02421, USA.
Abstract
I estimate the size and shape of the near-Earth asteroid (NEA) population using survey data from the Lincoln Near-Earth Asteroid Research (LINEAR) project, covering 375,000 square degrees of sky and including more than 1300 NEA detections. A simulation of detection probabilities for different values of orbital parameters and sizes combined with the detection statistics in a Bayesian framework provides a correction for observational bias and yields the NEA population distribution as a function of absolute magnitude, semi-major axis, eccentricity, and inclination. The NEA population is more highly inclined than previously estimated, and the total number of kilometer-sized NEAs is 1227
−90
+170
(1σ).
Publisher
American Association for the Advancement of Science (AAAS)
Reference13 articles.
1. The term near-Earth asteroids (NEAs) refers to asteroids with perihelia less than 1.3 AU and aphelia greater 0.983 AU. This definition does not include objects with observable cometary comas or tails although cataloged asteroids may include extinct comet nuclei.
2. Understanding the Distribution of Near-Earth Asteroids
3. W. F. Bottke et al. Icarus in press.
4. Rabinowitz D., Helin E., Lawrence K., Pravdo S., Nature 403, 165 (2000).
5. Lincoln Near-Earth Asteroid Program (LINEAR)
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