130  LY HYDRAE   (UGSU)   Range: 14.0-18.5V
     Position:   13 31 53.89  -29 40 58.9 (J2000, from .dat file)
     Magnitude:  V=18.530  B-V=-0.111     (Henden, single night)

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

a) Comparison star sequence

1    13 31 45.1  -29 42 55  -115 -116  3  11.096  0.166   0.228  0.014   
2    13 31 51.5  -29 37 29   -32  210  3  11.918  0.020   0.601  0.006   
3    13 32 15.0  -29 38 20   275  159  3  12.164  0.018   0.580  0.004   
4    13 31 49.8  -29 39 51   -54   68  3  12.778  0.016   0.585  0.012   
5    13 31 47.8  -29 43 26   -80 -147  3  13.086  0.019   0.635  0.005   
6    13 32 10.3  -29 37 24   214  215  3  14.451  0.022   0.733  0.009   
7    13 32 02.2  -29 39 36   108   83  3  14.833  0.014   0.773  0.005   
8    13 31 49.0  -29 42 14   -64  -75  3  15.413  0.022   0.612  0.008   
9    13 32 10.1  -29 42 48   211 -109  3  15.642  0.022   0.612  0.019   
10   13 31 59.8  -29 41 21    77  -22  3  16.071  0.027   1.156  0.021   
11   13 31 53.1  -29 41 44   -11  -45  3  17.269  0.049   0.663  0.048   
12   13 31 45.5  -29 41 08  -110   -9  2  18.144  0.019   0.677  0.069   


b) Wide-colour extension for CCD calibration

     13 31 51.4  -29 43 44   -33 -165  3  17.195  0.041   0.400  0.053   
     13 31 34.9  -29 42 55  -248 -116  3  17.097  0.038   0.432  0.044   
     13 32 05.7  -29 36 11   154  288  3  14.786  0.013   1.224  0.010   


Notes:

1. Star #1 is saturated, and is only accurate to about 0.2 magnitude. 
This star was also measured by Tycho-2 at V=11.02+/-0.09. This magnitude
needs to be used with care.

2. Classified as NL in GCVS 4th edition (Kholopov, et al. 1985). However 
possible superhumps were detected by Vrielman during the April 1998 
outburst, but they were not confirmed. Thus the reality of the SU UMa 
nature of this variable is still to be determined. Also known as Hya2 
(Downes and Shara, 1993). 

3. Varies at minimum between about V=17.7 and V=18.5.


Bruce Sumner
14 April 1999
Revised 10 June 1999  
Revised 5 December 2000