Time analysis for temporary gravitational capture. Stable orbits

Details Time analysis for temporary gravitational capture. Stable orbits Time analysis for temporary gravitational capture. Stable orbits

Oct 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...377.1119w&link_type=abstract

Astronomy and Astrophysics, v.377, p.1119-1127 (2001)

Astronomy and Astrophysics

Astrophysics

14

Planets And Satellites: General, Astrometry, Celestial Mechanics

Scientific paper

In a previous work, Vieira Neto & Winter (\cite{Vie01}) numerically explored the capture times of particles as temporary satellites of Uranus. The study was made in the framework of the spatial, circular, restricted three-body problem. Regions of the initial condition space whose trajectories are apparently stable were determined. The criterion adopted was that the trajectories do not escape from the planet during an integration of 105 years. These regions occur for a wide range of orbital initial inclinations (i). In the present work it is studied the reason for the existence of such stable regions. The stability of the planar retrograde trajectories is due to a family of simple periodic orbits and the associated quasi-periodic orbits that oscillate around them. These planar stable orbits had already been studied (Hénon \cite{Hen70}; Huang & Innanen \cite{Hua83}). Their results are reviewed using Poincaré surface of sections. The stable non-planar retrograde trajectories, 110o<= i<180o, are found to be tridimensional quasi-periodic orbits around the same family of periodic orbits found for the planar case (i=180o). It was not found any periodic orbit out of the plane associated to such quasi-periodic orbits. The largest region of stable prograde trajectories occurs at i=60o. Trajectories in such region are found to behave as quasi-periodic orbits evolving similarly to the stable retrograde trajectories that occurs at i=120o.

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