Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2011-08-24
Research in Astronomy and Astrophysics (Chinese Journal of Astronomy and Astrophysics), Vol. 10, Num. 6, pp.587-598, 2010
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
22 pages, 6 figures, accepted for publication in Research in Astronomy and Astrophysics (Chinese Journal of Astronomy and Astr
Scientific paper
10.1088/1674-4527/10/6/008
Recently, Near Earth Objects (NEOs) have been attracting great attention, and thousands of NEOs have been found to date. This paper examines the NEOs' orbital dynamics using the framework of an accurate solar system model and a Sun-Earth-NEO three-body system when the NEOs are close to Earth to search for NEOs with low-energy orbits. It is possible for such an NEO to be temporarily captured by Earth; its orbit would thereby be changed and it would become an Earth-orbiting object after a small increase in its velocity. From the point of view of the Sun-Earth-NEO restricted three-body system, it is possible for an NEO whose Jacobian constant is slightly lower than C1 and higher than C3 to be temporarily captured by Earth. When such an NEO approaches Earth, it is possible to change its orbit energy to close up the zero velocity surface of the three-body system at point L1 and make the NEO become a small satellite of the Earth. Some such NEOs were found; the best example only required a 410m/s increase in velocity.
Baoyin Hexi
Chen Yang
Li Junfeng
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