COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS Number 1512 Konkoly Observatory Budapest 1978 December 14 TIMES OF MINIMA OF SOME ECLIPSING VARIABLES Times of minima of eclipsing variables RZ Cas, U Cep have been observed photoelectrically with a 45-cm reflector at the Observatory of the Urals State University in 1975-78. All heliocentric minima are listed in the table, where (O-C) values of RZ Cas were computed with the help of the ephemerides by Parenago (1952), (O-C) values of U Cep were computed with the help of the ephemerides by Chudovichev (1939), N denotes the number of single observations obtained for the minimum. The filters used are given too. Table -------------------------------------------------------- Star J.D. Hel. (O-C) N filter Observer 2442000+ -------------------------------------------------------- RZ Cas 863.2441 -0.0500 34 B,V Orlov " 869.2235 -0.0469 42 B,V " " 870.4177 -0.0509 44 B,V " " 1200.3063 -0.0488 36 B,V " U Cep 1574.2593 +0.5858 52 V Polushina " 1574.2597 +0.5862 52 B " --------------------------------------------------------- L.M. ORLOV T.S. POLUSHINA Observatory of Urals State University, USSR References: Parenago, P.P., 1952, Peremennye Zvezdy 9, 125 Chudovichev, N.J., 1939, Bulleten Astronomicheskoj Observatorii Engelgardta N17.