224  AY DRACONIS   (SRA)   Range: 10.6-12.6p
     Position:   15 38 39.34  +57 01 33.8 (J2000, from .dat file)
     Magnitude:  V=12.956  B-V=1.352      (in .dat file)

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

a) Comparison star sequence

1    15 39 10.5  +57 09 20   253  466  3  11.149  0.016   0.530  0.007    
2    15 38 50.3  +57 02 58    90   84  3  11.552  0.016   0.681  0.008   
3    15 38 10.0  +57 08 32  -238  418  3  12.789  0.020   1.069  0.005   
4    15 38 36.5  +57 06 46   -22  312  3  13.051  0.015   0.611  0.003   
5    15 38 40.9  +57 06 28    13  294  3  13.751  0.016   0.794  0.011   
6    15 38 38.6  +57 02 26    -6   52  3  14.126  0.017   0.874  0.008   
7    15 38 57.3  +56 59 15   147 -139  3  14.366  0.021   0.513  0.003   
8    15 38 46.5  +57 03 16    59  102  3  15.032  0.016   0.946  0.019   
9    15 38 34.1  +57 03 22   -42  108  3  15.487  0.011   0.995  0.013   
10   15 38 16.0  +57 01 58  -190   24  3  15.653  0.006   0.748  0.025   
11   15 38 23.0  +57 03 26  -133  112  3  16.653  0.023   0.488  0.008   
12   15 38 46.6  +57 00 13    59  -81  3  17.080  0.033   0.666  0.052   
13   15 38 50.7  +57 06 41    93  307  3  17.713  0.054   0.755  0.060


b) Wide-colour extension for CCD calibration

None required

Notes:

1. The bright Algol-type eclipsing variable CK Dra is on the western 
edge of this field at 15h 37m 43.8s +57d 06' 49"  GCVS Vol 4 lists it 
with a range of 11.3-12.9p, a type of EA/SD and a period of 4.9945 days.

2. There are two bright Tycho-2 stars on the northern and southern edge 
of this field. They are located at 15h 39m 34.8s +57d 08' 51" and at 
15h 38m 36.4s +56d 55' 25" with reliable Tycho-2 magnitudes of respectively
V=9.34+/-0.02 and V=9.93+/-0.03.

3. There is a report from the MEDUZA observing program (Ondrej Pejcha,
vsnet-chat 4400, 30 April 2001) that this variable may have very deep
minimum, possible as faint as magnitude 16.
   

Bruce Sumner
3 June 2001