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NEOMOD: A New Orbit...
NEOMOD: A New Orbital Distribution Model for Near-Earth Objects
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- Nesvorný, David (author)
- Department of Space Studies, Southwest Research Institute, 1050 Walnut Street, Suite 300, Boulder, CO 80302, USA
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- Deienno, Rogerio (author)
- Department of Space Studies, Southwest Research Institute, 1050 Walnut Street, Suite 300, Boulder, CO 80302, USA
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- Bottke, William F. (author)
- Department of Space Studies, Southwest Research Institute, 1050 Walnut Street, Suite 300, Boulder, CO 80302, USA
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- Jedicke, Robert (author)
- Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822-1839, USA
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- Naidu, Shantanu (author)
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
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- Chesley, Steven R. (author)
- Department of Earth and Space Sciences, University of California, 595 Charles Young Drive East, 5656 Geology Building, Los Angeles, CA 90095, USA
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- Chodas, Paul W. (author)
- Department of Earth and Space Sciences, University of California, 595 Charles Young Drive East, 5656 Geology Building, Los Angeles, CA 90095, USA
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- Granvik, Mikael (author)
- Luleå tekniska universitet,Rymdteknik,Department of Physics, University of Helsinki, P.O. Box 64, FI-00014, Finland
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- Vokrouhlický, David (author)
- Institute of Astronomy, Charles University, V Holešovičkách 2, CZ18000 Prague 8, Czech Republic
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- Brož, Miroslav (author)
- Institute of Astronomy, Charles University, V Holešovičkách 2, CZ18000 Prague 8, Czech Republic
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- Morbidelli, Alessandro (author)
- Laboratoire Lagrange, UMR7293, Université Côte d’Azur, CNRS, Observatoire de la Côte d’Azur, Bouldervard de l’Observatoire, F-06304, Nice Cedex 4, France
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- Christensen, Eric (author)
- Lunar and Planetary Laboratory, The University of Arizona, 1629 E. University Boulevard, Tucson, AZ 85721-0092, USA
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- Shelly, Frank C. (author)
- Lunar and Planetary Laboratory, The University of Arizona, 1629 E. University Boulevard, Tucson, AZ 85721-0092, USA
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- Bolin, Bryce T. (author)
- Division of Physics, Mathematics and Astronomy, California Institute of Technology, Pasadena, CA 91125, USA; Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125, USA; NASA Postdoctoral Program Fellow, Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771, USA
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(creator_code:org_t)
- Institute of Physics (IOP), 2023
- 2023
- English.
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In: Astronomical Journal. - : Institute of Physics (IOP). - 0004-6256 .- 1538-3881. ; 166:2
- Related links:
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https://doi.org/10.3...
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https://ltu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
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- Near-Earth Objects (NEOs) are a transient population of small bodies with orbits near or in the terrestrial planet region. They represent a mid-stage in the dynamical cycle of asteroids and comets, which starts with their removal from the respective source regions—the main belt and trans-Neptunian scattered disk—and ends as bodies impact planets, disintegrate near the Sun, or are ejected from the solar system. Here we develop a new orbital model of NEOs by numerically integrating asteroid orbits from main-belt sources and calibrating the results on observations of the Catalina Sky Survey. The results imply a size-dependent sampling of the main belt with the ν 6 and 3:1 resonances producing ≃30% of NEOs with absolute magnitudes H = 15 and ≃80% of NEOs with H = 25. Hence, the large and small NEOs have different orbital distributions. The inferred flux of H < 18 bodies into the 3:1 resonance can be sustained only if the main-belt asteroids near the resonance drift toward the resonance at the maximal Yarkovsky rate (≃2 × 10−4 au Myr−1 for diameter D = 1 km and semimajor axis a = 2.5 au). This implies obliquities θ ≃ 0° for a < 2.5 au and θ ≃ 180° for a > 2.5 au, both in the immediate neighborhood of the resonance (the same applies to other resonances as well). We confirm the size-dependent disruption of asteroids near the Sun found in previous studies. An interested researcher can use the publicly available NEOMOD Simulator to generate user-defined samples of NEOs from our model.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- Onboard Space Systems
- Rymdtekniska system
Publication and Content Type
- ref (subject category)
- art (subject category)
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Nesvorný, David
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Deienno, Rogerio
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Bottke, William ...
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Jedicke, Robert
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Naidu, Shantanu
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Chesley, Steven ...
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Chodas, Paul W.
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Granvik, Mikael
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Vokrouhlický, Da ...
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Brož, Miroslav
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Morbidelli, Ales ...
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Christensen, Eri ...
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Shelly, Frank C.
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Bolin, Bryce T.
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Luleå University of Technology