COMMISSION 27 OF THE I. A. U.
          INFORMATION BULLETIN ON VARIABLE STARS
                     Number 3133



                                    Konkoly Observatory
                                    Budapest
                                    20 January 1988

                                    HU ISSN 0374-0676


             PHOTOELECTRIC PHOTOMETRY OF RR Her

  The variable star RR Her was included in my observational programme of
some late type variable stars in 1983. The two colour photoelectric observations
( in B and V bands ) of RR Her were performed from time to time at the
University Observatory in Brno and finished in 1987.
  The photomultiplier and filter combinations on a one-channel photoelectric
photometer attached to the 60 cm telescope were very close to the standard UBV
system. During 17 nights over 150 individual measurements of the variable
star were obtained. The data of the comparison stars are listed in Table I;
these values were derived in the usual way from UBV standard stars near RR
Her. From my observations it follows that these comparison stars are constant
in brightness.

                              Table I
              Photometric data for comparison stars
  Object                  BD        SAO       V        B-V        U-B
Comparison A         +50 2250      29779     9.25     +0.97     +0.83
Comparison B         +51 2053      29771     9.95     +1.10     +1.04

The observations of the RR Her are presented in Table II, where : denotes
less accurate measurements and n in the last column denotes the number of 
individual observations in each colour.

                               Table II
                     
                     Photometric observations of RR Her

JD-2440000   V       B-V      n   JD-2440000   V       B-V
5472.50      8.313   +2.54    7   5857.42      9.66    +3.02    6
             +/-10     +/-1                        +/-1      +/-2
5606.37      9.545   +2.96    2   6176.51      8.835   +2.77    5
             +/-6      +/-1                        +/-       +/-1
5621.26      9.750   +2.91    3   6177.48      8.808   +2.855   6
             +/-14     +2/-                        +/-3      +/-1
5809.53      8.84:   +2.80:   4   6251.43      8.105   +2.505   3
             +/-3      +/-4                        +/-6      +/-10
5838.45      9.45    +2.83;   8   6253.43      8.148   +2.49    7
             +/-2                                  +/-3      +/-1
5852.46      9.60    +2.96    5   6292.35      8.864   +2.77    3
             +/-2      +/-2                        +/-4      +/-2
6300.34      9.04    +2.73    2   6605.40      9.925   +2.97
             +/-2      +/-2                        +/-20     +/-3
6311.32      9.304   +2.82    5   6915.54      8.522   +2.78
             +/-5      +/-3                        +/-3      +/-1
6592.43      9.658   +2.84    3
             +/-1      +/-1


  These photoelectric observations - although somewhat fragmentary -
confirm that the period of variability of this star is near the value P =
239.7 days published in Kholopov et al. (1985).


  J. PAPOUSEK
Department of Astronomy
Brno University
Kotlarska 2, 611 37 BRNO
Czechoslovakia



Reference :
Kholopov, P.N. et al.; 1985, General Catalogue of Variable Stars, Vol. II,
      Nauka, Moscow