date       b      v       r        i      u    uv
1874    18.383  18.596  17.477  17.746  0.0  0.0
2095    18.763  18.925  17.848  18.105  0.0  0.0
2260    18.954  19.209  18.124  18.396  0.0  0.0
2427    19.050  19.409  18.189  18.562  0.0  0.0
2553     0.0    19.52    0.0     0.0   0.0  18.88
2787    19.56   19.60   18.51   18.92 19.42 18.95
2949    19.68   19.72   18.63   19.07  0.0   0.0
3270    19.93   19.96   18.88   19.37 19.85 19.20