2003/02/16 by Krzysztof Goździewski, Krzysztof Gozdziewski, Andrzej J. Maciejewski · 1 citation
Engineering · Physics and Astronomy · #Amplitude #Apsidal precession #Astro and Planetary Science #Celestial mechanics #Janus #Mean motion #Orbital elements #Planetary system #Radial velocity #Resonance (particle physics) #Spacecraft Dynamics and Control #Stability (learning theory) #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/374805
published as Astrophys.J. 586 (2003) L153-L156 · 7 pages, 5 figures, manuscript submitted to ApJ Letters, revised version
arxiv created 2003/02/16 · openalex publication_date 2003/03/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In this work, we perform a global analysis of the radial velocity curve of the HD 12661 system. Orbital fits that are obtained by the genetic and gradient algorithms of minimization reveal the proximity of the system to the 6 : 1 mean motion resonance. The orbits are locked in the secular resonance with apsidal axes librating about 180°, with a full amplitude of ≃90°-180°. Our solution incorporates the mutual interaction between the companions. A stability analysis with the MEGNO (Mean Exponential Growth factor of Nearby Orbits) indicator shows that the system is located in an extended stable zone of quasi-periodic motions. These results are different from those obtained on the basis of the orbital fit published by Fischer et al.