188  DK CASSIOPEIAE   (UGSS)   Range: 14.7-<18.2V
     Position:   00 18 07.96  +57 26 08.0  (J2000, from .dat file)
     Magnitude:  V=16.632  B-V=0.464       (in .dat file)
                                                            
ID     RA  (2000)   DEC       X    Y   N    V      ERR     B-V    ERR 

a) Comparison star sequence

1    00 18 24.0  +57 27 37   129   89  1   9.064  0.000   0.516  0.000   
2    00 18 13.4  +57 25 21    44  -47  1   9.945  0.001   0.364  0.001   
3    00 18 21.2  +57 23 48   106 -140  1  10.675  0.001   1.769  0.002   
4    00 17 39.8  +57 27 57  -227  109  1  11.167  0.001   1.261  0.002   
5    00 18 46.2  +57 29 25   308  197  1  12.475  0.002   1.397  0.004   
6    00 18 35.6  +57 25 40   223  -28  3  13.265  0.011   0.536  0.008   
7    00 18 08.6  +57 30 45     5  277  3  13.788  0.008   0.681  0.009   
8    00 18 00.7  +57 23 04   -59 -184  4  14.172  0.043   1.038  0.017   
9    00 17 52.8  +57 25 31  -123  -37  4  14.385  0.012   0.701  0.015   
10   00 17 56.3  +57 26 09   -94    1  4  14.758  0.017   0.777  0.014   
11   00 18 13.6  +57 26 45    45   37  3  15.023  0.018   0.824  0.020   
12   00 17 58.5  +57 26 38   -77   30  3  15.475  0.018   0.737  0.013   
13   00 18 09.1  +57 27 40     9   92  3  16.384  0.025   0.819  0.018   
14   00 18 09.4  +57 26 21    11   13  3  17.084  0.014   0.911  0.013   
15   00 18 08.8  +57 25 48     7  -20  3  18.961  0.022   1.207  0.024   


b) Wide-colour extension for CCD calibration

     00 18 34.3  +57 30 06   212  238  4  14.405  0.013   0.325  0.011   
     00 17 50.8  +57 30 11  -139  243  1  12.300  0.002   0.403  0.003   
     00 18 13.2  +57 28 46    42  158  3  13.579  0.008   1.422  0.010   
     00 18 14.0  +57 31 09    48  301  4  14.194  0.013   1.917  0.020   


Notes:

1. DK Cas is the southwest component of a faint triple star system. 
The brightest of the trio is the northeast component, measured as
V=18.160+/-0.008 and B-V=0.962+/-0.110 and located 2 arcsec northeast 
of DK Cas.

2. The magnitude shown above is a single night intermediate magnitude, 
obtained either when the variable was rising to maximum or fading to
minimum. DK Cas is very faint at minimum, an examination of POSS-II 
plates shows it to be about magnitude 20 in quiescence.

3. Stars #1, #2, #3 and #4 are saturated, and their magnitudes and 
colours are very approximate and should not be used.  They have the 
following reliable Tycho-2 magnitudes which can be used - 
	#1 V=8.54+/-0.01
 	#2 V=10.02+/-0.03
 	#3 V=10.70+/-0.05 
	#4 V=10.92+/-0.08 


Bruce Sumner
31 December 2000