78   PG 2337+300   (CV)   Range:  -13.8V
     Position:   23 40 04.31  +30 17 47.8 (J2000, from .dat file)
     Magnitude:  V=13.903  B-V=013        (Henden, single night)

a) Comparison star sequence

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

1    23 40 18.2  +30 19 21   180   93  3  11.263  0.014   0.976  0.019   
2    23 40 21.7  +30 16 21   225  -87  3  12.220  0.006   0.661  0.015   
3    23 39 44.1  +30 23 47  -261  359  3  13.065  0.005   0.729  0.010   
4    23 39 57.1  +30 17 55   -94    7  3  13.713  0.000   0.954  0.006   
5    23 39 57.7  +30 20 16   -85  148  3  14.041  0.005   0.959  0.008   
6    23 39 53.6  +30 17 31  -139  -17  3  14.248  0.010   0.784  0.008   
7    23 40 29.9  +30 17 19   331  -29  3  14.561  0.005   0.643  0.016   
8    23 40 03.3  +30 20 18   -13  150  3  15.006  0.000   0.816  0.009   
9    23 40 10.6  +30 15 28    82 -140  3  15.585  0.011   0.775  0.013   
10   23 40 05.1  +30 18 36    11   48  3  16.724  0.016   1.355  0.022   


b) Wide-colour extension for CCD calibration

     23 39 54.5  +30 23 18  -127  330  3  16.466  0.000   0.417  0.014   
     23 40 02.9  +30 14 20   -18 -208  3  14.443  0.005   0.559  0.011   
     23 39 46.6  +30 16 46  -230  -62  3  16.579  0.014   1.408  0.022   


Notes:

1. See IBVS 4501, 1998 for the discovery information regarding this 
bright Palomar-Green CV. PG 2337+300 is known to flicker on timescales 
of tens of seconds, but no outbursts have yet been observed. 

2. Identified as a potential dwarf nova by Koen and Orosz, 1997, IBVS 
4539. The measured magnitudes vary from V=13.7 to V=13.9.

 
Bruce Sumner
Revised 27 June 1999