198  V1141 AQUILAE   (UGSU)   Range: 15.0-19.5V
     Position:   19 37 09.84  +02 36 01.6    (J2000, from .dat file)
     Magnitude:  V=19.510  B-V=0.396         (Henden, single night)
     
ID     RA  (2000)   DEC       X    Y   N    V      ERR     B-V    ERR  

a) Comparison star sequence
   
1    19 37 14.7  +02 36 26    74   25  1  11.126  0.000   0.965  0.000   
2    19 37 16.4  +02 35 18    99  -43  3  11.375  0.178   0.601  0.032   
3    19 37 22.6  +02 36 35   192   34  3  12.024  0.037   0.993  0.019   
4    19 37 19.8  +02 34 35   150  -86  3  12.708  0.023   0.438  0.016   
5    19 37 12.1  +02 34 06    34 -115  3  13.061  0.013   1.454  0.006   
6    19 37 28.6  +02 33 22   282 -159  3  13.541  0.011   0.776  0.010   
7    19 37 11.9  +02 35 53    31   -8  3  13.993  0.014   0.828  0.010   
8    19 37 21.4  +02 36 04   174    3  3  14.530  0.013   0.668  0.016   
9    19 37 11.4  +02 34 52    23  -69  3  14.992  0.015   0.971  0.019   
10   19 37 06.7  +02 37 06   -46   65  3  15.553  0.016   0.860  0.010   
11   19 37 10.0  +02 35 51     3  -10  3  15.893  0.027   0.962  0.014   
12   19 37 10.3  +02 36 23     8   22  3  16.904  0.013   0.982  0.059   
13   19 37 10.4  +02 35 28     9  -33  3  17.948  0.077   0.740  0.098   
14   19 37 09.7  +02 35 22    -1  -39  2  18.811  0.044   1.085  0.084   


b) Wide-colour extension for CCD calibration

     19 37 14.2  +02 36 33    65   32  3  12.399  0.035   0.368  0.010   
     19 37 23.4  +02 37 00   204   59  3  12.310  0.008   1.815  0.007   
     19 37 32.6  +02 33 52   341 -129  1  14.304  0.002   1.912  0.006   


Notes:

1. There is another variable in this field, V1140 Aql, type RRAB, 
range 15.0.16.2p and period 0.4642 days. Details from the photometry 
file are:

     19 37 03.9  +02 36 32   -89   30  3  15.686  0.495    0.652  0.156  

2. Star #1 is a bright double star with a separation of about 11 arcsec.
In this photometry the components were measured with V=11.126 and 
V=12.399, but the brighter component has a reliable Tycho-2 magnitude 
of V=10.52+/-0.05. This Tycho-2 magnitude would be fairly close to the
combined magnitude when observed at low power, as the V=12.399 component
would add very little extra to V=10.52.

3. Star #2 is also saturated, but it does not yet have a reliable
magnitude. It is likely to be only accurate to about +/-0.2 magnitude.

4. The very faint stars #13 and #14 are only included for guidance 
when the variable is at minimum.

5. Superhumps first detected during the October 1999 superoutburst, 
making this another SU UMa-type dwarf nova. Seen at minimum of V=19.5 
on a single image.


Bruce Sumner
8 January 2001