[vsnet-sequence 21] V452 Cas - sequence

["Bruce Sumner" <b.sumner@bom.gov.au>]

There has been some recent discussion on the identification of this 
faint UGSU variable. Arne Henden confirmed the DWS identification as 
the fainter NW component of a faint double star. To assist observers 
in further monitoring this variable, the following comparison star 
sequence is presented, based, as usual, on Arne's field photometry.
Bruce Sumner
---------------------------------------------------------------------
166  V452 CASSIOPEIAE   (UGSU)   Range: 14.7-18.8V
     Position:   00 52 18.03  +53 51 49.9  (J2000, Henden astrometry)
     Magnitude:  V=18.81    B-V=0.28       (Henden, psf-fitting)      
                                                            
ID     RA  (2000)   DEC       X    Y  N    V      ERR     B-V    ERR 

1   00 52 04.9  +53 50 59  -116  -51  3  12.078  0.102   0.672  0.029 
2   00 52 21.6  +53 52 31    32   41  2  12.450  0.028   0.133  0.066 
3   00 52 19.6  +53 48 15    15 -215  2  12.694  0.071   1.096  0.069 
4   00 52 51.5  +53 50 55   296  -55  2  13.347  0.006   0.468  0.004 
5   00 52 20.6  +53 50 56    23  -55  2  13.646  0.021   1.253  0.036 
6   00 52 50.8  +53 55 32   289  222  2  14.021  0.010   0.576  0.001 
7   00 52 41.5  +53 49 05   208 -165  2  14.160  0.010   0.354  0.002 
8   00 52 07.7  +53 49 26   -91 -144  2  14.434  0.000   0.772  0.004 
9   00 52 33.0  +53 50 25   132  -85  2  14.583  0.006   0.625  0.006 
10  00 52 04.7  +53 50 26  -118  -84  2  14.998  0.015   0.825  0.003 
11  00 52 26.9  +53 52 43    79   53  2  15.419  0.012   0.632  0.005 
12  00 52 14.7  +53 52 03   -29   12  2  15.585  0.012   0.679  0.001 
13  00 52 09.6  +53 52 40   -74   50  2  15.941  0.000   0.803  0.006 
14  00 52 20.5  +53 51 48    22   -2  2  16.587  0.025   0.641  0.018 
15  00 52 18.5  +53 52 04     4   14  2  17.195  0.014   0.854  0.000 
16  00 52 15.1  +53 51 46   -25   -4  2  17.726  0.011   0.818  0.020 
17  00 52 19.4  +53 51 19    12  -32  2  18.861  0.021   0.631  0.049 

Notes:

1. Star 1 is saturated and should be used for guidance only.

2. There is a bright magnitude 10 star located only 100 arcsec 
south of V452 Cas.

3. There is a companion only 7 arcsec south of V452 Cas, shown in 
the wide-colour extension list above as V=15.80 B-V+1.32. Take 
care to correctly identify the variable as the fainter NW component 
of this double when the variable is at minimum.

Bruce Sumner
31 July 2000

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