COMMISSION 27 OF THE I.A.U. INFORMATION BULLETIN ON VARIABLE STARS NUMBER 114 Konkoly Observatory Budapest 11 November 1965 MINIMA OF ECLIPSING VARIABLES This report continues the one in IBVS 111, and contains 63 observed minima of 17 eclipsing variable stars. All are visual timings reduced by the tracing-paper method^1, except where noted. Elements in the 1958 General Catalogue of Variable Stars were used to compute O-C's unless otherwise specified. The number of estimates used for each minimum is given under n. J.D.hel E. O - C n Observer (+2400000) RT Andromedae 38965.801 +23,606 -0d015 13 A. Johnson 38972.717 +23,617 -0.015 8 A. Johnson 38984.660 +23,636 -0.024 11 D. Williams 38989.690 +23,644 -0.026 12 T. Hering 38999.755 +23,660 -0.024 19 S. Swanberg 39004.792 +23,668 -0.018 14 D. Loring 39011.706 +23,679 -0.022 17 R. Swanberg 39016.738 +23,687 -0.022 17 R. Swanberg 39028.687 +23,706 -0.022 14 R. Swanberg 39033.714 +23,714 -0.027 17 R. Swanberg XZ Andromedae 39000.870 +4,507 +0.046 21 M. Baldwin 39011.730 +4,515 +0.048 24 S. Swanberg CX Aquarii 39006.657 +22,798 -0.037 11 R. Monske OO Aquilae 38930.631 +9,341.5 -0.015 13 R. Monske 38961.637 +9,343.5 -0.022 13 R. Monske 38962.656 +9,345.5 -0.017 14 R. Monske 38963.670 +9,347.5 -0.017 13 R. Monske 38967.720 +9,355.5 -0.021 14 R. Monske 38970.757 +9,361.5 -0.025 13 R. Monske 38972.791 +9,365.5 -0.018 12 R. Monske 38996.614 +9,413.5 -0.014 10 R. Monske 38997.623 +9,414.5 -0.019 12 R. Monske 38999.647 +9,418.5 -0.022 11 R. Monske 39000.660 +9,420.5 -0.023 13 D. Loring 39001.673 +9,422.5 -0.023 13 W. Grady 39001.682 +9,422.5 -0.014 11 M. Baldwin 39002.693 +9,424.5 -0.017 13 R. Monske 39003.704 +9,426.5 -0.020 12 W. Grady V346 Aquilae 38987.630 +6,922.5 -0.014 11 R. Monske Y Camelopardalis 38763.816 +4,335 -0.023 16 M. Baldwin SV Camelopardalis 38972.738 +11,272 -0.014 10 A. Johnson 38997.652 +11,314 -0.009 11 F. Sanner RZ Cassiopeiae 2) 38640.4339 +17,808 -0.00352 21pe A. Mak 3) 39027.695 +18,132 -0.036 16 R. Swanberg 39033.673 +18,137 -0.034 19 R. Swanberg ZZ Cygni 38987.629 +28,396 -0.024 16 L. Hazel Z Draconis 38958.746 +4,191 +0.018 12 R. Monske 38972.675 +4,202 +0.015 13 R. Monske 38987.603 +4,213 +0.011 11 R. Monske TW Draconis 38957.678 +1,806 +0.019 24 R. Monske AI Draconis 38962.697 +11,949 +0.003 11 R. Monske 38992.679 +11,974 +0.015 13 R. Monske SZ Herculis 4) 38929.788 +2,204 +0.009 10 T. Cragg 38938.783 +2,215 +0.005 10 L. Kalish 38961.700 +2,243 +0.016 12 R. Monske 38970.700 +2,254 +0.017 12 R. Monske 38997.693 +2,287 +0.013 12 R. Monske 39002.600 +2,293 +0.011 12 R. Monske 39006.691 +2,298 +0.012 12 R. Monske SW Lacertae 38992.760 +48,703.5 +0.028 12 R. Monske 38993.711 +48,706.5 +0.017 19 T. Hering 38995.646 +48,712.5 +0.027 18 T. Hering 38996.607 +48,715.5 +0.026 17 T. Hering 39002.697 +48,734.5 +0.023 13 R. Monske 39023.388 +48,799.0 +0.028 12 G. Comello 39023.544 +48,799.5 +0.023 15 G. Comello UV Leonis 38797.774 +9,669 -0.008 12 M. Baldwin FL Lyrae 38957.769 +2,342 -0.003 16 R. Monske 38957.764 +2,342 -0.008 25 L. Hazel 38931.623 +2,330 -0.011 25 L. Hazel 39005.681 +2,364 -0.010 15 R. Monske V505 Sagittarii 38957.709 +4,601 -0.012 10 R. Monske 38970.713 +4,612 -0.019 12 R. Monske This work is sponsored by the American Association of Variable Star Observers, with David B. Williams as program coordinator. The reductions are made by the writer in collaboration with Joseph Ashbrook, except in a few cases which were checked. 1) See AA(c), 4, 81. 2) Reduced by Kwee-van Woerden method. The probable error of the time of minimum is +- 0.0001d. 3) Individual observations were published in "Observations of Variable Stars", Report No. 7, Kapteyn Astronomical Laboratory, Groningen, July 1965. 4) O - C's were computed from the elements given in Sky and Tele., 25, 5, 277. L. J. ROBINSON "Sky and Telescope" 49 Bay State Rd, Cambridge, Mass. 02138 USA