Why do Trojan ASCS (not) escape?

Autor(en)

Rudolf Dvorak, Kleomenis Tsiganis

Abstrakt

The orbits of 12 Trojan asteroids, which have Lyapunov times TL ~ 105 years and were previously classified as ASCs(=asteroids in stable chaos), are integrated for 50 Myrs, along with a group of neighbouring initial conditions for each nominal orbit. About 40% of the orbits present strong instabilities in the inclination, which may be attributed primarily to the action of the v16 secular resonance; two escapes are also recorded. Higher-order secular resonances, involving the nodes of the outer planets, are also found to be responsible for chaotic motion. Orbital stability depends critically on the choice of initial conditions and, thus, these objects can be regarded as being on the edge of strong chaos.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Aristotle University of Thessaloniki

Journal

Celestial Mechanics and Dynamical Astronomy: an international journal of space dynamics

Band

78

Seiten

125-136

Anzahl der Seiten

12

ISSN

0923-2958

Publikationsdatum

2000

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/why-do-trojan-ascs-not-escape(4c0ab316-ce23-4f2a-bc07-733931ad4d42).html