CCD Positions of Saturn and its Major Satellites from 2002-2006 - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue The Astronomical Journal Année : 2008

CCD Positions of Saturn and its Major Satellites from 2002-2006

Résumé

This paper presents 2154 precise positions of Saturn and its major satellites from 359 CCD exposures taken with the 1 m telescope at the Yunnan Observatory during the years 2002-2006. It also describes the improved image-processing techniques for the pixel positional measurement of Saturn's rings and its major satellites, especially for Mimas and Enceladus. The four bright satellites S3-S6 (i.e., Tethys, Dione, Rhea, and Titan) of Saturn are used to calibrate the CCD field of view by comparing their pixel positions with their theoretical ones from the theory TASS1.7. The observational positions of these major satellites, when measured with respect to Rhea, usually have a good agreement with their theoretical ones except for Mimas, which has the biggest systematic difference of about -0.3 arcsec in R.A. in its 2002 observational data sets. However, these differences of Mimas become much smaller when the recent Jet Propulsion Laboratory ephemeris is replaced. The rms errors in each coordinate are about 40 mas for Saturn and its bright satellites S2-S6, and 90 mas for Mimas. These positional observations are comparable to the best ground-based CCD observations.
Fichier principal
Vignette du fichier
peng2008_aj_136_5_2214.pdf (755.04 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-00807389 , version 1 (03-04-2013)

Identifiants

Citer

Qing Yu Peng, Alain Vienne, X. P. Wu, L. L. Gan, Josselin Desmars. CCD Positions of Saturn and its Major Satellites from 2002-2006. The Astronomical Journal, 2008, 136 (5), pp.2214-2221. ⟨10.1088/0004-6256/136/5/2214⟩. ⟨hal-00807389⟩
118 Consultations
238 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More