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Ground-based observations of Phoebe (S9) and its rotational dynamics

Published online by Cambridge University Press:  06 April 2010

Ekaterina Yu. Aleshkina ,
Alexandr V. Devyatkin  and
Denis L. Gorshanov
Ekaterina Yu. Aleshkina
Affiliation:
Main (Pulkovo) Astronomical Observatory of the Russian Academy of Sciences, Pulkovskoye ave., 65-1, 196140 Saint-Petersburg, RUSSIA email: aek@gao.spb.ru
Alexandr V. Devyatkin
Affiliation:
Main (Pulkovo) Astronomical Observatory of the Russian Academy of Sciences, Pulkovskoye ave., 65-1, 196140 Saint-Petersburg, RUSSIA email: aek@gao.spb.ru
Denis L. Gorshanov
Affiliation:
Main (Pulkovo) Astronomical Observatory of the Russian Academy of Sciences, Pulkovskoye ave., 65-1, 196140 Saint-Petersburg, RUSSIA email: aek@gao.spb.ru
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Abstract

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Analysis of CCD observations of Phoebe, the 9th satellite of Saturn (visual magnitude of about 16.5), with a mirror astrograph ZA-320M at Pulkovo Observatory in Saint-Petersburg are presented. Photometric observations are performed both in the integral band of the telescope and in bands BVR of the Johnson system. Reference catalogues USNO-A2.0 (for R - filter and integral observations) and Ticho-2 (for V and B - filters) were used. Rotational light-curve data for Phoebe taken over a short time span (2 - 8 hours) for several nights are presented. Numerical investigation of the evolution of Phoebe's rotational dynamics is carried out. The probability of Phoebe's capture in resonant states that are distinct from 1:1 is estimated.

Keywords

planets and satellites: Phoebetechniques: photometricsolar system: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S263: Icy Bodies of the Solar System , August 2009 , pp. 141 - 144
Copyright
Copyright © International Astronomical Union 2010

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