Astrometric observations of Nereid in 2006-2007
Résumé
In this paper, we present 112 new CCD astrometric positions of Nereid, the second and faint satellite of Neptune (mv ! 19). We observed this small satellite in the 2006-2007 period with the 1m and the 2.16m telescopes of Xinglong Station near Beijing, both equipped with large CCD detectors of 1340 × 1300 and 2048 × 2048 pixels, respectively. The high-density and highly accurate star catalogue UCAC2 (Zacharias, 2004) was used in the reduction so that a classical astrometric calibration method was applied. We have shown that our observations of Nereid appear to be of equal or higher precision (! ! 0.2”) than most of the recent CCD ones.
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