Astron. Astrophys. Suppl. Ser.
Volume 136, Number 3, May I 1999
|Page(s)||445 - 451|
|Published online||15 May 1999|
CCD observations of Nereid and a new orbital determination *,**
Observatório Nacional, Rua Gal. José Cristino 77, 20921-400 Rio de Janeiro, Brazil
2 Institut de Mécanique Céleste et de Calcul des Éphémérides, 77 avenue Denfert-Rochereau F-75014 Paris, France
Accepted: 8 January 1999
229 CCD positions of Nereid taken between 1993 and 1998 are presented. Many of the observations were taken near the periapsis. Considering also the other published positions we have a good distribution of the observations on the eccentric orbit of the satellite. Using a numeric integration method we fitted all these observations in order to determine one state vector for the orbit. The observed minus calculated standard deviation for all observations is 023, and for our observations it is 016.
Key words: astrometry / planets and satellites: Nereid
Based on observations made at Laboratório Nacional de Astrofísica/CNPq/MCT-Itajubá-Brazil. Please send offprint requests to C.H. Veiga.
Tables 1 and 2 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (22.214.171.124) or via http://cdsweb.u-strasbg.fr/Abstract.html
© European Southern Observatory (ESO), 1999