COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS NUMBER 584 Konkoly Observatory Budapest 1971 September 28 MINIMA OF ECLIPSING VARIABLES In July 1971 the following eclipsing variables were observed visually by members of Polskie Towarzystwo Milosnikow Astronomii, Centralna Sekcja Obserwacji Gwiazd Zmiennych Zacmieniowych (Polish Amateur Astronomical Society, Central Section of Observations of Eclipsing Variables) during a special 10 day meeting in Lanckorona near Cracow. The minima observed in earlier years were published in Acta Astr. 17, 59 (1967), 18, 331, (1968), 19, 173, (1969). The heliocentric moments of minima and limits of errors were determined by tracing-paper method. The (O-C)-s were computed using the elements given in "Rocznik Astronomiczny Obserwatorium Krakowskiego 1971". Letter n after moments of minima denotes normal minima. N Denotes number of observations. Observers' names are given in the last column. ------------------------------------------------------------------------ J.D. hel. N O-C Observer ------------------------------------------------------------------------ CX Aqr 2441160.532 +-0.002d 8 +0.005d L.Frasinski OO Aql 2441152.487 0.002 21 +0.006 L.Frasinski 2441152.491 0.006 12 +0.010 L.Krzanik 2441153.500 n 0.006 13 +0.005 A.Letkowski 2441153.503 n 0.006 18 +0.008 A.Soska 2441153.505 n 0.006 18 +0.010 L.Frasinski 2441155.524 n 0.006 16 +0.002 A.Soska ZZ Cas 2441158.577 n 0.008 12 +0.006 P.Flin WZ Cyg 2441154.528 0.004 8 -0.001 A.Soska 2441157.449 0.004 10 -0.003 L.Frasinski 2441157.449 0.004 11 -0.003 A.Soska 2441157.450 0.007 11 -0.002 P.Flin V 401 Cyg 2441156.480 0.009 16 +0.045 P.Flin 2441156.481 n 0.007 24 +0.046 L.Frasinski 2441156.489 0.008 9 +0.054 Z.Zembaty TT Del 2441152.579 n 0.008 18 +0.065 P.Flin 2441155.438 n 0.004 13 +0.052 A.Soska SZ Her 2441157.465 0.002 9 +0.005 P.Flin 2441157.469 0.004 9 +0.009 L.Frasinski TZ Lyr 2441152.421 0.005 14 -0.003 P.Flin 2441152.426 n 0.005 16 +0.002 A.Soska DI Peg 2441155.502 0.004 9 -0.010 L.Frasinski 2441155.506 0.004 9 -0.006 P.Flin RS Sct 2441156.496 0.006 12 +0.016 P.Flin 2441156.496 n 0.007 14 +0.016 A.Soska 2441156.500 0.004 10 +0.020 L.Frasinski 2441156.503 n 0.006 15 +0.023 L.Krzanik BE Vul 2441157.455 0.006 10 -0.001 P.Flin 2441157.457 0.002 14 +0.001 L.Frasinski 2441157.459 0.004 11 +0.003 A.Soska 2441157.462 0.003 7 +0.006 L.Krzanik ------------------------------------------------------------------------ Cracow, September 1971 PIOTR FLIN Polish Amateur Astronomical Society Central Section of Observations of Eclipsing Variables and Cracow Astronomical Observatory