EDP Sciences
Free access
Volume 486, Number 2, August I 2008
Page(s) 613 - 615
Section Planets and planetary systems
DOI http://dx.doi.org/10.1051/0004-6361:200809838
Published online 22 May 2008

A&A 486, 613-615 (2008)
DOI: 10.1051/0004-6361:200809838

134340 Pluto: nine years of CCD observations

C. H. Veiga

Observatório Nacional, Rua General José Cristino 77, Bairro Imperial de São Cristóvão Cep:20921-400 Rio de Janeiro, Brazil Coordenação de Astronomia e Astrofísica
    e-mail: cave@on.br

Received 24 March 2008 / Accepted 15 April 2008

Aims. The purpose of this article is to present the new accurate astrometric CCD positions of Pluto, now designated as the minor planet 134340 Pluto and member of the Trans-Neptunian population. These positions were obtained from 1108 frames taken during 49 nights. The observations were distributed in 17 continuous missions between the years of 1995 and 2004.
Methods. The USNO-A2.0 star catalog, locally corrected by UCAC2 catalog, was used for the astrometric calibration. All positions were compared with those calculated by the PLU017 ephemeris.
Results. In this work precise positions of 134340 Pluto are presented. The residues, observed minus calculated positions, have mean and standard deviation smaller than 0$\farcs$05, in the right ascension and declination coordinates' directions.

Key words: minor planets, asteroids -- celestial mechanics -- ephemerides -- Kuiper Belt -- astrometry

© ESO 2008