247  AK CANCRI   (UGSU)   Range: 12.7-18.7V
     Position:   08 55 21.20  +11 18 15.4 (J2000, from .dat file)
     Magnitude:  V=18.711  B-V=0.521      (in .dat file)

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

a) Comparison star sequence

1    08 54 43.7  +11 18 40  -552   25  2  11.125  0.028   1.173  0.016   
2    08 55 51.1  +11 12 51   440 -324  2  11.865  0.022   0.589  0.006   
3    08 55 25.5  +11 09 20    63 -535  2  12.345  0.011   0.664  0.018   
4    08 55 39.2  +11 14 13   265 -243  2  12.483  0.027   0.796  0.013   
5    08 55 34.8  +11 08 38   199 -577  2  12.856  0.017   0.552  0.011   
6    08 55 16.2  +11 23 06   -73  291  2  13.186  0.015   0.694  0.016   
7    08 55 41.3  +11 18 59   295   44  2  13.459  0.021   0.660  0.009   
8    08 55 11.4  +11 12 45  -145 -330  2  13.736  0.020   0.957  0.030  
9    08 55 15.4  +11 09 14   -85 -541  2  13.916  0.000   0.529  0.029   
10   08 55 45.8  +11 16 29   361 -106  2  14.188  0.019   0.491  0.008   
11   08 55 12.6  +11 22 16  -126  241  2  14.523  0.010   0.609  0.016   
12   08 55 30.8  +11 13 36   141 -279  2  14.839  0.018   0.842  0.013   
13   08 55 26.1  +11 20 05    72  110  2  15.122  0.017   0.934  0.004   
14   08 54 59.2  +11 18 22  -323    7  2  15.548  0.006   0.747  0.022   
15   08 55 18.8  +11 19 43   -35   88  2  16.229  0.016   0.568  0.000   
16   08 55 13.9  +11 17 03  -107  -72  2  16.440  0.043   0.880  0.017   
17   08 55 24.0  +11 15 37    41 -158  2  16.944  0.036   0.972  0.028   
18   08 55 25.8  +11 19 24    67   69  2  17.901  0.008   0.572  0.016   


b) Wide-colour extension for CCD calibration
                         
None available.


Notes:

1. The two brightest stars are saturated and their magnitudes and colours 
are probably only accurate to about +/-0.1 magnitude.

2. There are four bright stars in this field with reliable Tycho-2
magnitudes:

       RA  (2000)   Dec      V           B-V
    08 55 02.3  +11 31 56   9.50+/-0.03  1.21
    08 55 21.0  +11 01 37   9.79+/-0.03  0.58
    08 54 47.5  +11 09 21  10.08+/-0.04  1.16
    08 54 44.7  +11 30 05  10.44+/-0.05  0.27

3. RASNZ chart 709, dated January 1983, has a lettered sequence. The 
AAVSO chart dated Jan 1985 also shows the RASNZ letters, plus three 
visual estimates.
 
4. The correspondencies between the two earlier charts and this new 
sequence are as follows. Only stars with an ID # form part of this new
sequence.

          ID    Henden   RASNZ   AAVSO

          4    12.483      b     b
          6    13.186      d     d 132
               13.201              136
               13.205              134
          7    13.459      a     a
               14.423      c     c 
          13   15.122      f     f
          15   16.229      k          
               16.276      e     e
          16   16.440      h     h
          18   17.901      l
               18.281      g     g


Bruce Sumner
7 February 2002
Revised 5 March 2002