138  OU VIRGINIS    (UGSU)   Range: 14.7-18.9V
     Position:   14 35 00.24  -00 46 05.8  (J2000, single night)
     Magnitude:  V=18.924  B-V=-0.201      (Henden, single night)

a) Comparison star sequence

ID     RA (2000)    DEC       X    Y   N    V      ERR     B-V    ERR     
1    14 34 42.9  -00 43 16  -259  170  4  11.689  0.000   0.398  0.004   
2    14 35 06.7  -00 47 10    98  -64  3  12.390  0.008   0.520  0.006   
3    14 34 45.7  -00 47 06  -217  -60  6  13.494  0.004   0.578  0.008   
4    14 35 09.1  -00 45 24   133   43  7  14.346  0.010   0.914  0.004   
5    14 34 44.4  -00 50 03  -237 -237  5  14.731  0.009   0.804  0.012   
6    14 35 18.5  -00 41 16   274  290  4  15.188  0.008   0.647  0.010   
7    14 35 16.5  -00 47 05   245  -59  4  15.735  0.006   0.591  0.008   
8    14 35 07.3  -00 45 36   106   30  4  16.371  0.006   0.613  0.008   
9    14 34 58.3  -00 44 41   -29   85  4  16.635  0.009   0.836  0.012   
10   14 35 05.6  -00 45 36    82   30  4  17.391  0.020   1.043  0.064   
11   14 35 03.4  -00 46 02    48    4  4  18.232  0.057   0.609  0.062   


b) Wide-colour extension for CCD calibration

     14 35 12.6  -00 44 53   187   73  3  17.080  0.009    1.353  0.020   
     14 35 22.9  -00 41 02   341  304  4  15.719  0.013    1.411  0.017 


Notes:

1. During the determination of this sequence, a field star was found 
to be a previously unknown variable. The following observations are 
available, all obtained at Flagstaff Station during May 1999:

Position: 14 34 43.1  -00 47 10  -257  -64

     Date             V      B-V      ERRORS
     May 13.7948UTC 14.677  0.863  0.003  0.004
     May 15.7624UTC 14.275  0.882  0.002  0.004
     May 16.7688UTC 14.323  0.911  0.002  0.004
     May 18.8228UTC 14.631  0.976  0.003  0.005 

2. Superhumps with a period of 0.0732d were first detected during the 
superoutburst of June 2000 (Vanmunster, et al, 2000, IBVS 4955). 

3. The variable fluctuates markedly at minimum between at least 
V=18.1 and V=18.9. 

4.  Shown and Vir4 in Downes, Webbink and Shara (1997). Also previously
known as LBQS 1432-0033.


Bruce Sumner
Revised 13 June 1999 
Revised 16 April 2002