COMMISSION 27 OF THE I. A. U.
           INFORMATION BULLETIN ON VARIABLE STARS
                       Number 2533

                                         Konkoly Observatory
                                         Budapest
                                         11 June 1984

                                         HU ISSN 0374-0676


       THE UBV PHOTOMETRY FOR A NEW RR-TYPE VARIABLE IN Leo

 A new RR-type variable in Leo, discovered by Huruhata (1983), was observed
on February, March and May using UBV photometer attached to the 91 cm
reflector at McDonald Observatory. The results from about 420 observations
show that the period is 0.6738459d instead of 0.402132d given by Huruhata.
The derived elements are as follows:

       Max = J.D. (H)2445741.159(+-0.002d)+0.6738495d(+-0.0000100d).


                               [FIGURE 1]

              Figure 1   The light curve of V magnitude

                                [FIGURE 2]

                  Figure 2   The variation of (B-V)

                                [FIGURE 3]

                  Figure 3   The variation of (U-B)


  The magnitude and the colour indexes at maximum are: Vmax = 12.44m,
(B-V)max = 0.10m, (U-B)max = -0.03m. The amplitudes are: Delta V = 1.10m, Delta
(B-V) =0.34m, Delta (U-B) = 0.21m. The skewness of light curve, epsilon = 0.14.
These characters show it is an RRa-type variable. The light curve is shown in 
Figure 1.


                  TAN HUISONG

                McDonald Observatory
        (A visiting scholar from Yunnan Observatory, China)

Reference:
Masaaki Huruhata, 1983, I.B.V.S. No. 2402