Open AccessAstrometric observations of triton ★
Author(s) -
Qiao R. C.,
Yan Y. R.,
Shen K. X.,
Dourneau G.,
Xi X. J.,
Cheng X.,
Wang S. H.,
Tang Z. H.,
Liu J. R.
Publication year - 2007
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2007.11526.x
Subject(s) - physics , neptune , ephemeris , cassegrain reflector , astrometry , astronomy , stars , astrophysics , photometry (optics) , satellite , telescope , planet
Astrometric positions of the Neptunian Satellite Triton are given for the opposition of Neptune for the years 1996, 2003, 2005 and 2006. The 943 observed positions were obtained at the Cassegrain focus of a 156‐cm reflector. In our reduction, the up‐to‐date catalogue of stars UCAC2 was chosen to ensure a proper astrometric calibration. Our observed positions are compared to theoretical positions provided from JPL and IMCCE ephemerides. The observed minus calculated residuals have s.d. values of the order of 0.04 arcsec.