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Resonances and librations of some Apollo and Amor asteroids with the Earth.The orbital evolution of the Apollo asteroids 1620 Geographos and 1685 Toro and Amor asteroids 433 Eros, 1221 Amor, and 1627 Ivar are investigated by numerical integration. All these asteroids, with the exception of Geographos, exhibit systematic orbital couplings with the Earth during the time interval studied (1600-2350 A.D.). 1685 Toro is captured into libration once with Venus due to the 13.5 resonance, and once with the Earth due to the 8:5 resonance. Both librations are unstable because of the effect of the 13:8 near commensurability of the Venus-Earth system. 433 Eros exhibits no libration pattern; the regular variation of its orbital period is due to the beat-effect of the 4:7 resonance with the Earth.
Document ID
19730041886
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Ip, W.-H.
(California, University La Jolla, Calif., United States)
Mehra, R.
(Kungl. Tekniska Hogskolan Stockholm, Sweden)
Date Acquired
August 7, 2013
Publication Date
February 1, 1973
Publication Information
Publication: Astronomical Journal
Volume: 78
Subject Category
Space Sciences
Accession Number
73A26688
Funding Number(s)
CONTRACT_GRANT: NGR-05-009-110
Distribution Limits
Public
Copyright
Other

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