Astron. Astrophys. Suppl. Ser.
Volume 142, Number 1, February II 2000
|Page(s)||81 - 84|
|Published online||15 February 2000|
CCD observations of Phoebe *,**
Observatório Nacional, Rua Gal. José Cristino 77, 20921-400 Rio de Janeiro, Brazil e-mail: email@example.com or firstname.lastname@example.org
Accepted: 19 November 1999
Astromeric CCD positions of the Saturnian satellite Phoebe obtained from 60 frames taken in 10 nights are presented. The observations were distributed between 5 missions in the years 1995 to 1997. For the astrometric calibration the USNO-A2.0 Catalogue is used. All positions are compared with those calculated by Jacobson (1998a) and Bec-Borsenberger & Rocher (1982). The residuals have mean and standard deviation smaller than 05, in the x and y directions. The distribution of residuals is suggestive of the need of an improvement for the orbit calculations.
Key words: astrometry / planets and satellites / Saturn
Based on observations made at Laboratório Nacional de Astrofísica/CNPq/MCT-Itajubá-Brazil. Please send offprint requests to C.H. Veiga.
© European Southern Observatory (ESO), 2000