140  GO COMAE   (UGSU)   Range: 13.1-18.5V
     Position:   12 56 37.10  +26 36 43.5 (J2000, from .dat file)
     Magnitude:  V=18.535  B-V=0.037      (Henden, single night)

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

a) Comparison star sequence

1    12 56 46.4  +26 41 32   124  286  3  13.126  0.005   0.726  0.001   
2    12 56 41.3  +26 42 49    56  364  3  14.575  0.008   0.671  0.003   
3    12 56 55.5  +26 37 45   247   60  3  14.737  0.005   0.577  0.002   
4    12 56 41.3  +26 33 11    56 -214  3  14.756  0.005   1.031  0.007   
5    12 56 40.2  +26 34 39    42 -126  3  15.258  0.009   0.705  0.007   
6    12 56 23.9  +26 37 10  -177   25  3  15.669  0.009   0.661  0.003   
7    12 56 54.6  +26 38 26   234  101  3  15.849  0.013   0.714  0.008   
8    12 56 18.4  +26 35 58  -250  -47  3  16.088  0.006   0.584  0.008   
9    12 56 14.7  +26 35 54  -300  -51  3  16.736  0.009   0.721  0.015   
10   12 56 24.0  +26 35 39  -176  -66  3  17.770  0.011   1.410  0.014   
11   12 56 36.9  +26 38 10    -3   85  2  18.788  0.107   0.859  0.112   

b) Wide-colour extension for CCD calibration

     12 57 00.2  +26 42 54   309  369  3  18.279  0.019   0.417  0.035   
     12 56 29.0  +26 42 03  -109  318  3  17.482  0.000   1.500  0.017      
     12 56 59.0  +26 42 05   293  320  3  17.660  0.009   1.518  0.073      
   

Notes:

1. Star #11, a very faint comparison star, was measured on two nights 
only. Its magnitude and colour are given for guidance only.

2. A VSS RASNZ chart exists for this variable, chart No. 1013. The 
letters on that chart correspond to the following comparison stars 
in this sequence. Also the AAVSO Preliminary (e) chart dated 07/1995
contains CCD(V) magnitudes measured by Kato at Kyoto University. In 
addition Misselt (PASP,108,1996) measured three stars.
                
                    ID  RASNZ  AAVSO  Misselt  Henden
                         
                    1     b    13.5            13.127   
                    3     d                    14.739
                    4     c    14.4   14.824   14.757
                    5     f    14.9   15.332   15.261
                    6     e           15.725   15.672

3. Varies at minimum between about V=18.5 and V=18.9.
                   

Bruce Sumner
Revised 12 June 1999