115  BC URSAE MAJORIS   (UGSU)   Range: 10.9-18.5V
     Position:   11 52 15.84  +49 14 42.2 (J2000, from .dat file)
     Magnitude:  V=18.636  B-V=0.020      (Henden. single night)

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

a) Comparison star sequence
 
1    11 52 06.5  +49 12 16   -92 -146  5  12.748  0.069   0.601  0.045   
2    11 52 36.4  +49 15 02   201   20  6  12.923  0.049   0.660  0.030   
3    11 52 01.0  +49 15 05  -145   23  6  13.115  0.023   0.571  0.016   
4    11 51 56.9  +49 16 49  -185  127  6  13.838  0.013   0.659  0.010   
5    11 52 37.9  +49 19 01   216  259  6  14.043  0.015   0.922  0.009   
6    11 52 11.8  +49 19 10   -39  268  6  14.204  0.015   0.621  0.014   
7    11 52 42.0  +49 19 05   256  263  6  14.938  0.012   0.636  0.017   
8    11 52 21.7  +49 11 18    58 -205  6  15.402  0.014   0.819  0.019   
9    11 51 53.0  +49 13 11  -224  -91  6  15.468  0.016   0.723  0.009   
10   11 52 02.1  +49 18 50  -134  248  6  15.549  0.016   0.739  0.030   
11   11 52 29.5  +49 16 28   135  106  6  16.351  0.030   1.235  0.029   
12   11 52 24.5  +49 14 06    85  -36  6  17.073  0.022   0.516  0.059   
13   11 52 10.2  +49 15 15   -55   33  3  18.021  0.134   1.071  0.016   
14   11 52 13.4  +49 15 20   -24   38  4  18.420  0.182   0.628  0.153   


b) Wide-colour extension for CCD calibration

     11 52 25.3  +49 12 50    93 -112  4  18.716  0.219   0.261  0.331   
     11 52 06.4  +49 17 37   -92  175  5  16.905  0.018   1.535  0.081   


Notes:

1. The AAVSO preliminary 'e' chart, dated 5/1994, has the following
magnitudes, which apparently originated on the AAVSO preliminary chart
of 1971. The comparison stars on the AAVSO chart labeled 165 and 170 
cannot be identified and a check against DSS shows that they probably 
do not exist. In addition Misselt (PASP,108,1996) measured three stars.  
                     
                     ID     V      AAVSO   Misselt

                     1    12.748    12.1   12.761
                     2    12.923    12.3
                     3    13.115    12.7   13.166
                     4    13.838    13.6
                     5    14.043    13.7
                     6    14.204    14.0
                     8    15.402    15.5
                     9    15.468    15.3
                    10    15.549    15.8
                    12    17.073            17.136 

2. Superhumps were found by Iida during the April 1994 superoutburst, 
confirming this as a SU UMa-type dwarf nova. 

3. Fluctuates at minimum between V=18.4 and V=18.7.

 
       
B. Sumner
Revised 6 June 1999