117  CI GEMINORUM   (UGSS:)   Range: 14.7-21.7V
     Position:   06 30 05.86  +22 18 50.7 (J2000, IAUC 4758)
     Magnitude:  V= 21.66  B-V=0.8        (IAUC 4758)     

       RA (2000)    DEC       X    Y   N    V      ERR     B-V    ERR     
a) Comparison star sequence

1    06 29 49.2  +22 15 17  -232 -214  3  11.194  0.058   1.071  0.072   
2    06 30 06.7  +22 17 14    12  -97  3  12.052  0.017   0.416  0.011   
3    06 30 07.3  +22 19 40    19   49  3  12.246  0.019   1.026  0.009   
4    06 30 01.4  +22 14 43   -63 -248  3  12.867  0.020   0.250  0.014   
5    06 30 08.6  +22 17 35    38  -76  3  13.629  0.020   0.661  0.012   
6    06 30 14.5  +22 20 45   120  114  3  13.982  0.016   0.584  0.016   
7    06 29 56.7  +22 18 01  -128  -51  3  14.216  0.021   1.308  0.015   
8    06 30 08.6  +22 20 44    37  113  3  14.724  0.017   0.843  0.015   
9    06 30 00.8  +22 20 18   -71   87  3  14.988  0.020   0.423  0.016   
10   06 29 59.4  +22 18 32   -91  -19  3  15.536  0.029   0.852  0.010   
11   06 29 59.9  +22 19 36   -83   45  3  16.094  0.027   0.734  0.019   
12   06 30 01.5  +22 19 40   -60   49  3  16.430  0.029   0.779  0.019   
13   06 30 08.9  +22 18 13    42  -38  3  17.221  0.063   0.661  0.065   
14   06 30 03.7  +22 18 58   -31    7  3  17.701  0.035   0.876  0.051   
15   06 30 05.5  +22 19 08    -6   17  3  18.082  0.138   0.712  0.149   
16   06 30 05.7  +22 18 58    -2    7  2  18.573  0.062   1.055  0.022   


b) Wide-colour extension for CCD calibration

     06 29 49.0  +22 24 51  -234  360  3  15.425  0.014  -0.109  0.024   
     06 29 46.5  +22 19 36  -269   45  3  13.433  0.020   0.173  0.017   
     06 29 56.6  +22 15 10  -129 -221  3  14.678  0.018   0.187  0.018   
     06 30 30.8  +22 14 19   345 -272  3  13.744  0.017   1.481  0.032   
     06 30 24.0  +22 14 10   252 -281  3  13.174  0.019   1.796  0.033   
  

Notes:

1. The star identified as CI Gem by Downes and Shara (PASP, 105, 1993) 
is incorrect. They identified the star here called star #16 as the 
variable, however CI Gem is in fact a fainter star some 7 arcsec south 
of this star.

2. The magnitude and colour for CI Gem given above is from ESO/Danish CCD 
image taken in 1989 (see IAUC 4758, which also has a discussion of the 
February 1999 outburst of this variable).

3. Preliminary indications are that this variable has bright (~14.7),
long (~18 days) outbursts and fainter (~15.7), shorter (~6 days) 
outbursts, indicative of UGSS-type behaviour. This is substantiated 
by the reddish B-V value of 0.47 at minimum.

4. There are two Tycho-2 stars just outside the field of this photometry. 
One is in the southeast corner at 06h 30m 33.6s +22d 13' 00" and has a 
reliable Tycho-2 magnitude of V=9.60+/-0.04. The other in the northwest 
corner at 06h 29m 37s +22d 22' 03" and has a reliable Tycho-2 magnitude 
of V=10.64+/-0.08. 

5. Star #15 is contaminated by another 18.1V star located 7 arcsec to 
the NE, and it therefore has a larger than expected error.


Bruce Sumner
Revised 14 November 2000