| 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: This email address is being protected from spambots. You need JavaScript enabled to view it.
or This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
13
July
1999
Accepted:
19
November
1999
Abstract
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
Based on observations made at Laboratório Nacional de Astrofísica/CNPq/MCT-Itajubá-Brazil. Please send offprint requests to C.H. Veiga.
Table 1 is only available at http://aas.aanda.org
© European Southern Observatory (ESO), 2000