Astrometric observations of triton
Astrometric observations of triton
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DOI:
10.1111/j.1365-2966.2007.11526.x
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发表时间:
2007-04
影响因子:
4.8
通讯作者:
R. Qiao;Y. Yan;K. Shen;G. Dourneau;X. Xi;X. Cheng;S. H. Wang;Zheng-hong Tang;Jiren Liu
中科院分区:
文献类型:
--
作者:
R. Qiao;Y. Yan;K. Shen;G. Dourneau;X. Xi;X. Cheng;S. H. Wang;Zheng-hong Tang;Jiren Liu
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.