55.  V2176 CYGNI   (UGSU)   Range: 13.4-20.2V
     Position:   19 27 11.73  +54 17 51.1  (J2000, from .dat file)
     Magnitude:  V=20.369  B-V=-0.260      (Henden, single night)
                                                            
ID     RA  (2000)   DEC       X    Y   N    V      ERR     B-V    ERR 

a) Comparison star sequence

1    19 26 43.3  +54 19 32  -248  101  3  11.568  0.106   0.444  0.006   
2    19 27 21.4  +54 19 31    85  100  3  12.017  0.014   1.025  0.030   
3    19 26 48.8  +54 17 45  -200   -6  3  12.372  0.033   1.322  0.007   
4    19 27 17.7  +54 14 02    53 -229  3  12.649  0.024   0.490  0.018   
5    19 27 38.1  +54 14 17   231 -215  3  12.971  0.018   0.638  0.005   
6    19 27 32.6  +54 21 22   183  211  6  13.698  0.018   0.633  0.008   
7    19 26 51.0  +54 16 09  -181 -102  4  14.274  0.013   0.736  0.012   
8    19 27 11.0  +54 16 40    -6  -71  4  14.774  0.013   0.887  0.007   
9    19 27 30.6  +54 16 48   165  -63  4  15.408  0.019   0.522  0.009   
10   19 27 04.7  +54 17 56   -61    5  4  15.751  0.027   0.815  0.008   
11   19 27 16.2  +54 16 48    39  -63  4  16.209  0.014   0.644  0.016   
12   19 27 06.0  +54 17 12   -50  -39  4  16.780  0.013   0.888  0.041   
13   19 27 18.4  +54 17 28    58  -23  4  17.239  0.070   1.090  0.092   
14   19 27 17.5  +54 18 01    51   10  3  18.285  0.041   0.653  0.027   


b) Wide-colour extension for CCD calibration

     19 27 25.0  +54 19 12   117   81  4  16.678  0.034   1.434  0.013   
     19 26 44.9  +54 14 12  -235 -219  4  16.566  0.055   1.508  0.026   


Notes:

1. Star #1 is saturated, and its magnitude and colour is approximate.

2. This variable was previously known as USNO 1425.09823278, from USNO-A1.0. 
It was also known as SCHM1. 

3. This large amplitude dwarf nova was first seen to have a superoutbursts 
in 1997. The minimum magnitude of V=20.4 was found from a single deep image.


Bruce Sumner
Revised 30 July 1999