197  V589 HERCULI   (UGSU)   Range: 14.1-18.3V
     Position:   16 22 07.16  +19 22 37.1 (J2000, from .dat file)
     Magnitude:  V=18.25   B-V=0.351      (Henden, single night)

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

a) Comparison star sequence

1    16 21 48.9  +19 28 34  -259  357  2  13.664  0.006   1.036  0.002   
2    16 22 21.5  +19 25 23   202  166  2  13.895  0.000   0.752  0.001   
3    16 22 06.0  +19 25 42   -18  185  2  14.433  0.000   1.099  0.008   
4    16 22 02.3  +19 20 45   -70 -112  2  14.800  0.012   0.819  0.006   
5    16 22 14.8  +19 25 59   108  202  2  15.052  0.006   0.577  0.001   
6    16 22 25.8  +19 24 35   262  118  2  15.489  0.012   0.683  0.011   
7    16 22 04.7  +19 22 47   -35   10  2  16.219  0.011   0.754  0.008   
8    16 22 06.7  +19 23 58    -7   81  2  17.194  0.008   0.771  0.060   
9    16 22 08.4  +19 22 09    17  -28  2  18.610  0.008   0.779  0.000   


b) Wide-colour extension for CCD calibration

     16 22 09.3  +19 28 36    29  359  2  14.829  0.000    0.505  0.006   
     16 22 26.2  +19 21 00   269  -97  2  14.361  0.011    0.548  0.006   
     16 21 53.6  +19 29 28  -193  411  2  15.462  0.000    1.056  0.002   
     16 22 31.8  +19 27 50   348  313  2  15.358  0.008    1.168  0.008   



Notes:

1. Digital Sky Survey images indicate that the quiescent magnitude 
of V589 Her is about 19.

2. Time-series photometry of V589 Her performed by Jerry Foote, Utah and
Tonny Vanmunster, Belgium in April 2902 resulted in the determination of 
a firm superhump period of 0.0947 +/- 0.0005 d, using the PDM technique.
Thus V589 Her is a newly identified UGSU type dwarf nova inside the so
called 'period gap'. 


Bruce Sumner 
8 January 2001
Revised 12 April 2002