COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                    Number 1370


                                  Konkoly Observatory
                                  Budapest
                                  1977 December 19



           ON FIVE RR LYRAE-TYPE STARS




   Based on numerous estimates obtained from the sky patrol
plates of the Moscow and Odessa observatories, as well as from
visual observations resulting elements of five variable stars
have been derived (Table 1). One of these, DI Lyr, has not been
studied earlier. Elements of three stars FK Vul, BH and DR Lyr,
found earlier proved to be erroneous.
   In investigating BH Lyr the old observations by N.F. Floria
and E. Kheilo have also been used and reduced anew. Jumping 
variations in the periods of BH and DI Lyrae have been detected;
therefore for them several systems of elements are found designated 
with (A), (B) and (C) in Table 1.
   Moments of maxima are given in Tables 2-6 which have been
obtained from seasonal mean light-curves. Mean light-curves are
plotted in Fig. 1.





                           V. TSESSEVICH
                           Odessa Astronomical
                           Observatory


                           Table 1

              Elements of five RR Lyrae-type stars

Star       Interval JD      Max.hel.JD    Period      Note

BH Lyr   2413712-2427927   2413712.358   0.6129028     A 
  "      2434472-2436102   2434472.547   0.6128941     B
  "      2436423-2441888   2437164.365   0.6128864     C
DI Lyr   2437160-2439293   2437160.310   0.4174486     A
  "      2439293-2440768   2439293.468   0.4178451     B
  "      2440768-2442000   2440768.442   0.4174492     C
DR Lyr   2437100-2442000   2437168.403   0.8313502
FH Vul   2418565-2442665   2436027.454   0.4054185    *
FK Vul   2416729-2442638   2436076.423   0.4340529    **

Notes:   *-the value of period  changes; **-strong Blazhko phenomenon.

                                  Table 2

                      Mean moments of maxima of BH Lyrae

Observer    Max.hel.JD       E        O-A       O-B      O-C

Florja     2413712.342   -38264     -0.016       -        -
  "           4224.117   -37429     - .015       -        -
  "           4935.133:  -36269     + .034       -        -
Kheylo       27927.410   -15071     - .003    -0.041      -
  "          34472.544:  - 4392     - .056:   - .003      -
  "           5011.284:  - 3513     - .059:   + .003      -
  "           6102.235:  - 1733     - .075    + .003      -
  "           6423.385   - 1209        -      - .003    0.000
  "           6790.506   -  610        -      - .006   + .002
Tsessevich    7164.371        0        -      - .007   + .006
  "           8142.521   + 1596        -      - .036   - .011
  "           9031.216   + 3046        -      - .037   - .001 
  "          40381.410   + 5249        -      - .049   + .004
  "           1486.437   + 7052        -      - .070   - .003
  "           1888.495   + 7708        -      - .071   + .002

                      Table 3

         Mean  moments of maxima of DI Lyrae

Max.hel.JD       E      O-A      O-B     O-C

2437160.312       0   +0.002      -       -
   7761.427    1440   - .009      -       -
   8196.427    2482   + .010      -       -
   8560.433    3354     .000      -       -
   8904.412    4178   + .002      -       -
   9293.469    5110   - .003   +0.001     -
   9716.380    6123   + .032     .000     -
  40768.444    8643   + .126   + .001  +0.002
   1486.449   10363   + .119   - .068  - .006
   1873.434   11290   + .129   - .092  + .004


              Table 4

           Mean moments of maxima of DR Lyrae 

 Max.hel.JD     E       O-C

2437168.409      0    +0.006
   8938.338   2129    - .010
   9377.296   2657    - .004
   9998.321   3404    + .002
  40801.405   4370    + .002
   1486.453   5194    + .017
   1920.389   5716    - .012

                      Table 5

Mean moments of maxima of FH Vulpeculae

Max.hel.JD       E      O-C       Note

2418568.27   -43065   +0.16     Moscow
  36027.450       0   - .004     vis.
   7176.413  + 2834   + .003    Odessa
   7883.456  + 4578   - .004      "
   8638.358  + 6440   + .009      "
   9024.309  + 7392   + .001      "   +Moscow
  40121.370  +10098     .000    Odessa
   2665.368  +16373   - .003     "

                      Table 6

          Mean moments of maxima of FK Vulpeculae 

Max.hel.JD      E        O-C       Note 

2416729.31:  -44573    -0.07:     Moscow
  29170.30:  -15911    + .09:       "
  36076.414       0    - .009     Odessa
   6465.328  +  896    - .006       "
   7172.406  + 2525    - .001       "
   7886.432  + 4170    + .008       "
   8291.404  + 5103    + .009       "
   9029.294  + 6803    + .009       "
   9689.487  + 8324    + .008     Moscow
  42276.414  +14284    - .021     Odessa
   2638.444  +15118    + .010       "


                        [FIGURE 1]