Issue |
A&A
Volume 365, Number 2, January 2001
|
|
---|---|---|
Page(s) | 214 - 221 | |
Section | Celestial mechanics and astrometry | |
DOI | https://doi.org/10.1051/0004-6361:20000183 | |
Published online | 15 January 2001 |
Detection of arcs in Saturn's F ring during the 1995 Sun ring-plane crossing
1
Équipe Gamma-Gravitation, Service d'Astrophysique, CEA/Saclay, Orme des Merisiers, 91191 Gif-sur-Yvette Cedex, France
2
Institute for Astronomy, University of Hawai, 2680 Woodlawn Drive, Honolulu, Hawai 96822, Hawai
3
DESPA, Observatoire de Paris, 92195 Meudon Cedex Principal, France
Corresponding author: S. Charnoz, charnoz@discovery.saclay.cea.fr
Received:
24
July
2000
Accepted:
19
October
2000
Observations of the November 1995 Sun crossing of the Saturn's ring-plane made with
the 3.6 m CFH telescope, using the UHAO adaptive optics system, are presented here.
We report the detection of four arcs located in the vicinity of the F ring.
They can be seen one day later in HST images. The combination of both data sets gives
accurate determinations of their orbits.
Semi-major axes range from 140 020 km to 140 080 km, with a mean of km.
This is about 150 km smaller than previous estimates of the F ring radius
from Voyager 1 and 2 data, but close to the orbit of another arc observed at the same epoch
in HST images.
Key words: planets: individual: Saturn
© ESO, 2001
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