145  NY SERPENTIS   (UGSU)   Range: 14.4-17.9V
     Position:   15 13 02.32  +23 15 08.8 (J2000, from .dat file)
     Magnitude:  V=15.211  B-V=0.012      (Henden, single night)

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

a) Comparison star sequence

1    15 13 12.3  +23 18 37   138  208  3  13.744  0.006   0.911  0.006   
2    15 12 39.9  +23 16 28  -309   79  3  13.799  0.006   0.553  0.005   
3    15 13 18.8  +23 10 40   228 -269  3  14.042  0.011   0.838  0.004   
4    15 12 37.6  +23 12 42  -340 -147  3  14.382  0.012   0.701  0.002   
5    15 13 01.6  +23 21 29   -10  380  2  14.678  0.008   0.808  0.009   
6    15 12 47.5  +23 13 07  -204 -122  3  15.532  0.009   0.830  0.005   
7    15 12 58.9  +23 15 30   -47   21  3  15.885  0.009   0.577  0.002   
8    15 13 23.9  +23 17 39   297  149  3  16.218  0.011   1.138  0.005   
9    15 13 12.9  +23 11 48   146 -201  3  16.426  0.009   0.778  0.005   
10   15 13 05.6  +23 12 33    45 -156  3  16.755  0.011   1.139  0.008   
11   15 13 03.4  +23 17 27    15  138  3  17.510  0.018   0.676  0.026   
12   15 13 08.2  +23 14 46    81  -24  3  17.873  0.013   0.700  0.021   
13   15 13 06.4  +23 15 48    57   39  3  18.653  0.050   0.444  0.071   


b) Wide-colour extension for CCD calibration

     15 12 54.0  +23 17 49  -114  160  3  16.988  0.109   0.248  0.045   
     15 12 42.3  +23 10 45  -276 -264  3  18.151  0.062   0.437  0.268   
     15 13 13.3  +23 15 39   152   30  3  16.776  0.009   1.494  0.015   
     15 13 10.2  +23 12 14   109 -175  3  16.788  0.000   1.549  0.017   


Notes:

1.The CBA chart for this variable has two comparison stars marked, namely 
C1 and C2. One of these is included in the above sequence, and the other 
is included in the wide-colour extension (it was too red to include in 
the comparison star sequence). Details are as follows:

                        CBA     Henden
                               V      B-V
                         C1  15.885  0.577
                         C2  16.776  1.494

2. The bluest star in the wide-colour extension has a large error, and 
may be a small amplitude variable. If used, it should be used with care.

3. Varies at minimum between about V=15.0 and V=15.2.


 
Bruce Sumner
Revised 24 June 1999