| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 142, Number 1, February II 2000
|
|
|---|---|---|
| Page(s) | 81 - 84 | |
| DOI | https://doi.org/10.1051/aas:2000138 | |
| Published online | 15 February 2000 | |
CCD observations of Phoebe *,**
Observatório Nacional, Rua Gal. José Cristino 77, 20921-400 Rio de Janeiro, Brazil e-mail: cave@on.br or rvm@on.br
Received:
13
July
1999
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 0
5, 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
© European Southern Observatory (ESO), 2000