Volume 422, Number 1, July IV 2004
|Page(s)||369 - 375|
|Section||Celestial mechanics and astrometry|
|Published online||06 July 2004|
From Jupiter-family to Encke-like orbits
The rôle of non-gravitational forces and resonances
Astronomical Institute of SAV, Bratislava, Slovak Republic
2 Istituto di Astrofisica Spaziale e Fisica Cosmica, Roma, Italy
Corresponding author: G. B. Valsecchi, email@example.com
Accepted: 12 March 2004
We investigate numerically the transfer routes from Jupiter-family towards Encke-like cometary orbits, including in the model all the planets as well as non-gravitational forces. The numerical integrations are started from orbital elements similar to those of 2P/Encke, changing the perihelion distance q, to obtain starting orbits in the Jupiter family, and the non-gravitational parameter A2. The results show that some of the model orbits reach the Encke-like stage within a reasonable time, comparable to a typical active cometary lifetime; along the way, at the crossing of mean motion resonances with Jupiter, temporary captures in resonance may occur. Thus, resonances and non-gravitational forces appear to be key factors in the transfer of orbits from the Jupiter family to the Encke region.
Key words: comets: general / comets: individual: 2P/Encke
© ESO, 2004
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