76   UY PUPPIS   (UG)   Range: 13.0-16.1V 
     Position:   07 46 31.25  -12 57 08.9  (J2000, from .dat file)
     Magnitude:  V=16.116  B-V=0.771       (.dat file, single night)
                                                            
ID      RA  (2000)   DEC       X    Y  N    V      ERR     B-V    ERR

a) Comparison star sequence

1    07 46 49.2  -12 59 29   263 -140  3  10.874  0.075   1.846  0.013   
2    07 46 48.2  -12 56 51   248   18  3  11.286  0.005   0.245  0.001   
3    07 46 39.3  -12 51 52   119  317  3  11.886  0.005   1.046  0.001   
4    07 46 15.7  -12 56 32  -227   37  3  12.254  0.000   0.451  0.004   
5    07 46 38.6  -12 54 46   108  143  3  12.609  0.008   0.347  0.005   
6    07 46 42.7  -12 58 32   169  -83  3  12.922  0.006   0.413  0.007   
7    07 46 32.6  -12 57 33    21  -24  3  13.590  0.006   0.176  0.005   
8    07 46 40.8  -12 57 11   140   -2  3  14.025  0.000   0.582  0.003   
9    07 46 34.8  -12 57 21    53  -12  3  14.428  0.005   0.293  0.008   
10   07 46 20.5  -12 57 19  -156  -10  3  14.669  0.000   0.545  0.004   
11   07 46 33.4  -12 55 15    32  114  3  15.060  0.016   0.689  0.012   
12   07 46 33.5  -12 56 58    33   11  3  15.872  0.023   0.565  0.030   
13   07 46 28.7  -12 57 19   -37  -10  3  16.584  0.011   0.566  0.042   
14   07 46 29.8  -12 57 21   -20  -12  3  17.234  0.047   0.684  0.079   
15   07 46 32.5  -12 56 29    19   40  3  18.440  0.050   0.958  0.149   


b) Wide-colour extension for CCD calibration

     07 46 09.2  -12 53 10  -322  239  3  12.616  0.005   0.166  0.004   
     07 46 35.3  -12 53 39    59  210  3  12.293  0.019   1.778  0.008   


Notes:

1. Stars #1, 2 and 3 are saturated and their magnitudes and colours are
approximate. However star #1 does has a more reliable Tycho-2 magnitude 
of V=10.74+/-0.05. Stars #2 and #3 should be used for guidance only 
until accurate magnitudes are determined.

2. UY Pup has a close companion located 10 arcsec southeast. The 
companion has a magnitude of V=16.484+/-0.016 and B-V=0.380+/-0.030.

3. UY Pup is another example of a UG variable that becomes redder as it
faded. Near maximum it was measured at V=14.132 and B-V=0.146, but at 
quiescence it had a colour of B-V=0.771. UY Pup varies at minimum between 
about V=15.5 and V=16.1.


Bruce Sumner
22 January 2001