270  VW CORONAE BOREALIS   (UGSU)   Range: 14.0-20.2V
     Position:   16 00 03.71  +33 11 14.4  (J2000, from .dat file)
     Magnitude:  V=20.150  B-V=-0.168      (Henden, single night)           
                                              
ID     RA  (2000)   DEC       X    Y  N    V      ERR      B-V    ERR 

a) Comparison star sequence

1    16 00 07.2  +33 08 42    44 -152  1  13.166  0.001   0.534  0.001   
2    16 00 01.5  +33 13 52   -27  158  1  14.044  0.002   0.634  0.003   
3    15 59 46.4  +33 17 05  -217  351  1  14.578  0.002   0.693  0.003   
4    16 00 20.1  +33 07 04   206 -250  1  14.855  0.003   0.763  0.004   
5    16 00 05.2  +33 13 13    19  119  1  15.129  0.003   0.676  0.004   
6    16 00 02.7  +33 10 06   -13  -68  1  15.542  0.004   0.870  0.006   
7    16 00 14.5  +33 07 55   135 -199  1  15.893  0.005   1.169  0.009   
8    16 00 05.3  +33 12 10    20   56  1  16.823  0.010   1.245  0.019   
9    16 00 01.6  +33 11 48   -26   34  1  17.797  0.021   0.811  0.031   
10   16 00 02.0  +33 11 04   -22  -10  1  19.550  0.131   0.868  0.198   


b) Wide-colour extension for CCD calibration

     16 00 13.2  +33 06 18   119 -296  1  14.084  0.002   1.480  0.004   


Notes:

1. This preliminary sequence has been determined from a single night of
photometry. The external errors are estimates to be about +/-0.02 mag.

2. The quiescent magnitude was determined from Arne Henden's photometry.

3. The faint mag 19 companion has large errors, and is included only for
guidance purposes.



Bruce Sumner
25 March 2002