210  V406 VULPECULAE   (XND)   Range: 15.5-18.9V
     Position:   18 58 41.51  +22 39 30.2  (J2000, from .dat file)
     Magnitude: V=18.889   B-V=0.466       (.dat file, single night)

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

a) Comparison star sequence

1    18 58 41.2  +22 38 09    -5  -81  1  10.629  0.000   0.838  0.000   
2    18 58 22.2  +22 41 46  -267  136  2  11.569  0.104   1.035  0.076   
3    18 58 27.1  +22 40 42  -200   72  4  12.523  0.264   0.221  0.107   
4    18 58 46.6  +22 36 27    70 -183  3  13.122  0.055   0.760  0.041   
5    18 58 55.2  +22 39 55   189   25  3  13.415  0.023   0.670  0.012   
6    18 58 35.8  +22 40 26   -79   56  3  14.206  0.019   1.312  0.017   
7    18 58 34.1  +22 41 51  -102  141  3  14.470  0.005   0.830  0.020   
8    18 58 37.7  +22 39 08   -53  -22  3  15.116  0.009   1.192  0.013   
9    18 58 27.8  +22 41 15  -189  105  3  15.356  0.006   0.983  0.019   
10   18 58 44.9  +22 43 16    47  226  3  15.724  0.006   1.095  0.021   
11   18 58 37.5  +22 39 33   -55    3  3  16.385  0.016   0.975  0.023   
12   18 58 45.8  +22 39 14    59  -16  3  16.979  0.009   0.800  0.019   
13   18 58 39.5  +22 39 26   -28   -4  3  18.131  0.034   1.075  0.103   


b) Wide-colour extension for CCD calibration

     18 58 40.2  +22 37 03   -18 -147  3  12.927  0.123   0.620  0.107   
     18 58 36.6  +22 37 25   -68 -125  3  13.586  0.038   1.935  0.011   


Notes:

1. Stars #1, #2 and #3 are saturated and their magnitudes and colours 
are approximate. However star #1 has a reliable Tycho-2 magnitude of
V=9.67+/-0.02. Stars #2 and #3 should be only used for guidance until
accurate magnitudes are determined.

2. The range given above is approximate as it was determined only from 
the three single nights used to produce this sequence. It quite possibly
becomes brighter than stated at maximum. Minimum magnitude has been 
reported as faint as 24V.

3. Known previously as XTE J1859+226. 


Bruce Sumner
28 January 2001