253  TU TRIANGULII   (UG)   Range: 14.6-18.1V
     Position:   01 39 15.31  +31 24 19.6 (J2000, from .dat file)
     Magnitude:  V=18.066  B-V=-0.189      (in .dat file)

ID     RA  (2000)   DEC       X    Y   N    V      ERR     B-V    ERR 

a) Comparison star sequence

1    01 39 36.2  +31 25 19   267   59  2  12.039  0.008   1.020  0.026   
2    01 39 24.5  +31 23 28   118  -52  2  12.664  0.008   0.801  0.025   
3    01 39 34.1  +31 23 41   240  -39  2  13.156  0.010   0.609  0.022   
4    01 39 37.8  +31 23 35   288  -45  2  13.892  0.008   0.739  0.022   
5    01 39 34.0  +31 27 06   239  166  2  14.083  0.008   0.609  0.023   
6    01 39 09.4  +31 19 09   -75 -311  2  14.187  0.008   0.502  0.027   
7    01 38 53.4  +31 26 22  -281  121  2  14.877  0.006   0.794  0.025   
8    01 39 18.6  +31 25 41    42   81  2  15.486  0.000   0.737  0.022   
9    01 39 01.8  +31 26 29  -173  129  2  15.639  0.006   0.696  0.032   
10   01 39 01.2  +31 25 32  -181   72  2  16.131  0.000   0.736  0.007   
11   01 39 17.7  +31 23 21    30  -59  2  16.879  0.000   0.831  0.044   
12   01 39 18.3  +31 24 13    38   -7  2  17.920  0.032   1.533  0.010   
13   01 39 17.7  +31 24 26    31    6  1  18.438  0.053   0.496  0.072   


b) Wide-colour extension for CCD calibration

     01 39 05.7  +31 27 53  -123  213  2  15.850  0.008   1.148  0.032   


Notes:

1. There is a bright Tycho-2 star with a reliable magnitude at
01h 39m 28.1s +31d 28' 45" with a magnitude of V=10.47+/-0.04.


Bruce Sumner
10 February 2002