Authors: Veiga C. H. and Vieira Martins R.
Year: 2005
Title: CCD astrometric observations of Amalthea and Thebe
Journal: Astronomy and Astrophysics
Volume: 437
Number: 3
Pages: 1147-1150
Keywords: Saturn, small, observation, position, CCD, data
Abstract: This paper presents the results of observations of Jupiter's satellites Amalthea and Thebe made in 1995, 1996 and 2001 at the Laborat򱨯 Nacional de Astrof첩ca (LNA), Brazil. The observations were made in visible light wavelengths with a 1.6 m reflector telescope and the light of Jupiter was covered by a mask placed near the CCD surface. The already published positions for 1995, whose astrometric reduction used the Galilean satellites, are now reduced using the stars in the CCD fields like the new positions of 1996 and 2001. The 2001 data are much better than those obtained in 1995, and that those from 1996 show large residuals. Considering the 310 frames observed, the mean residual is about 0.01 arcsec and the standard deviation is about 0.15 arcsec.
%F: AA(Observat򱨯 Nacional, Rua General Jos矃ristino 77, 20921-400 Rio de Janeiro, Brazil cave@on.br), AB(Observat򱨯 Nacional, Rua General Jos矃ristino 77, 20921-400 Rio de Janeiro, Brazil; Observat򱨯 do Valongo, Ladeira Pedro Ant󭨯 43, 20080-090 Rio de Janeiro, Brazil ; Institut de M袡nique C諥ste et de Calcul des Ȱh让rides, 77 avenue Denfert Rochereau, 75014 Paris, France)
Bibliogaphic Code: 2005A%26A...437.1147V

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