CCD astrometric observations of Phoebe in 2003-2004

Details CCD astrometric observations of Phoebe in 2003-2004 CCD astrometric observations of Phoebe in 2003-2004

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...454..379q&link_type=abstract

Astronomy and Astrophysics, Volume 454, Issue 1, July IV 2006, pp.379-383

Astronomy and Astrophysics

Astrophysics

6

Planets And Satellite: General, Astrometry

Scientific paper

In 2003-2004, we obtained 115 new observations of Phoebe, the 9th Saturnian faint satellite (visual magnitude of about 16.5). We used a large CCD detector (2048×2048 pixels) mounted on the 1.56 m astrometric reflector at the Sheshan Station, near Shanghai. In our reduction, an up-to-date catalogue of stars, UCAC2 (Zacharias et al. 2004), was chosen to ensure a proper astrometric calibration. A comparison of our observations to three recently available, high quality ephemerides, including the JPL SAT185 by Jacobson (2004b), has shown that most of our observed positions of Phoebe present an accuracy of some tens of mas, which appears to be a very high level for such a faint satellite.

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