COMMISSION 27 OF THE I. A. U.
        INFORMATION BULLETIN ON VARIABLE STARS
                     Number 1030

                                  Konkoly Observatory
                                  Budapest
                                  1975 August 7



         REVISED ELEMENTS OF ECLIPSING STARS



WW Cancri:         Min.J.D.2427133.459 + 1.1159843d E
                   Observations from 1933 to 1974, period constant.
EG Cephei:         Min.J.D.2437821.865 + 0.5446215d E
                   Precise observations only since 1963.
V 477 Cygni:       Min.J.D.2437317.280 + 2.3469876d E
                   From observations since 1961; rotation of the
                   apsidal line, period probably about 550 years.
TZ Draconis:       Min.J.D.2933852.330 + 0.8660347d E
                   Observations from 1951 to 1979, period probably
                   constant.
RW Tauri:          Min.J.D.2437164.4860 + 2.7688480d E
                   (1960 to 1968)
                   Min.J.D.2439916.7163 + 2.7688575d E
                   (Since 1968)
                   Period strongly and irregularly variable last
                   large change about 1960(+0.0000271d = + 2.3s)
VV Ursae Maioris:  Min.J.D.2439245.408 + 0.6873709d E
                   Change of period about 1966
BU Vulpeculae:     Min.J.D.2433533.683 + 0.5689930d E
                   Observations 1950 to 1974, period constant
                   since 1950.




        PHOTOGRAPHIC MINIMA OF ECLIPSING STARS

OO Aql: J.D. 244 2607.4755, O-C_K=+0.0096d, O-C_M=+0.2220d (!)  n=26
          Normal minimum from 2602, 2607 and 2609

TZ Dra:   2546.454, O-C_K,M=+0.009d, O-C_A=+0.002d
W UMa:    2454.389, O-C_K  =-0.003d, O-C_M=+0.005d
VV UMa:   2534.473, O-C_K  =+0.028d, O-C_M=+0.063d, O-C_A =-0.005d

C_K=C according Krakow, C_M according GCVS Moscow, C_A according Ahnert.





                        PAUL AHNERT

                     Sonneberg Observatory