274  DE CANCRI   (UG)    Range: 11.6-18.0V
     Position:   08 35 27.24  +19 45 31.0  (J2000, from .dat file)
     Magnitude:  V=18.034  B-V=0.808       (Henden, dat file)
                                                            
ID     RA  (2000)   DEC       X    Y  N    V      ERR      B-V    ERR 

a) Comparison star sequence

1    08 35 22.4  +19 47 28   -71  117  2  11.408  0.211   0.353  0.051   
2    08 35 12.3  +19 51 01  -213  330  2  11.872  0.188   0.622  0.069   
3    08 35 34.4  +19 48 15    99  164  2  13.038  0.000   0.535  0.006   
4    08 35 16.7  +19 45 07  -151  -24  2  13.597  0.000   0.624  0.004   
5    08 35 17.2  +19 46 16  -144   45  2  14.175  0.000   0.568  0.006   
6    08 35 23.9  +19 42 19   -49 -192  2  14.715  0.006   0.834  0.006   
7    08 35 24.9  +19 44 09   -35  -82  2  15.214  0.006   0.631  0.011   
8    08 35 33.6  +19 45 00    88  -31  2  15.667  0.006   0.615  0.013
9    08 35 15.2  +19 41 48  -172 -223  2  16.372  0.011   0.609  0.008   
10   08 35 15.6  +19 45 55  -166   24  2  17.679  0.061   1.102  0.127   
11   08 35 32.3  +19 45 29    69   -2  2  18.115  0.008   0.452  0.045   


b) Wide-colour extension for CCD calibration

blue 08 35 35.6  +19 44 13   115  -78  2  13.118  0.000  -0.204  0.032   
red  08 35 14.5  +19 42 33  -182 -178  2  15.317  0.012   1.458  0.003   

Notes:

1. Star #1 is saturated and its magnitude and colour are expected to be
accurate to only +/-0.2 mag.

2. There is a bright star in this field at 08h 35m 45.1s +19d 46' 16" with
a reliable Tycho-1 magnitude of 7.48+/-0.01.

3. Note that star #1 has a faint companion of magnitude V=14.00 located
only 7 arcsec to the west. It will not be a problem for visual observers.

4. The star identified here as DE Cnc would appear to be a field star, as
it is too red to be the variable. The real DE Cnc is yet to be identified.

 
Bruce Sumner
7 April 2002