QIAO, R. C.; CHENG, X.; SHEN, K. X.; DOURNEAU, G.; WANG, S. H.; HU, X. Y.; TANG, Z. H.; XI, X. J.

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QIAO, R. C.
National Time Service Center
United Laboratory for Optical Astrometry

CHENG, X.
National Time Service Center

SHEN, K. X.
National Time Service Center

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Ce document a été publié dans

Monthly Notices of the Royal Astronomical Society. 2008, vol. 391, p. 1791-1795

Oxford University Press (OUP): Policy P - Oxford Open Option A

Résumé en anglais

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.< Réduire

Mots clés en anglais

planets and satellites

satellites of Neptune

astrometry

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Unités de recherche

Laboratoire d'Astrophysique de Bordeaux (LAB) - UMR 5804