All Tables

Table 1: General information about the observations. In the table, (date) is that of observation night, (T) is the total time length of the observation in minutes, (N) is the number of images, (S) is the mean number of reference stars, (C) is the dimension of the CCD in pixel, (P) is the size of the pixel in $\mu$ m and (s) is the plate scale in arcsecond. For the CCD used in 2000 the pixel is binned from the original $\rm 9~\mu m\times 9~\mu m$ size.
Table 2: Observed minus calculated statistics for Proteus-Triton (P-T), Triton and Proteus in arcseconds. The meaning of the symbols is: $x=\Delta\alpha \cos \delta, y=\Delta\delta$ , $\sigma$ for the standard deviation and Nfor the number of frames. There are 44 observations for Triton and Proteus and 45 for Proteus-Triton because one observation for the satellites has $(\rm O{-}C) > 1\hbox {$^\prime $ }\hbox {$^\prime $ }$ and $(\rm O{-}C) < 1\hbox {$^\prime $ }\hbox {$^\prime $ }$ for their difference. The statistics for 2000 and 2001 are also given.