COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS NUMBER 247 Konkoly Observatory Budapest 1968 January 8 MINIMA OF ECLIPSING VARIABLES (VIII) This report continues IBVS No. 180, and contains 144 observed heliocentric minima of 35 eclipsing variable stars. All are visual timings reduced by the tracing-paper method, except where noted. Linear elements in the 1958 General- Catalogue of Variable Stars were used to compute the O-C's, unless otherwise specified. The number of estimates used for each minima is given under n. J. D. hel. E O-C n Observer (2400000+) RT Andromedae 39665.811: +24,719 -0.007: 16 Carl Anderson 39672.712 +24,730 -0.024 10 M. Baldwin 39677.745 +24,738 -0.023 12 M. Baldwin 39694.725 +24,765 -0.024 11 M. Baldwin 39701.640 +24,776 -0.027 11 M. Baldwin 39740.643 +24,838 -0.018 14 W. Lowder 39772.710: +24,889 -0.026: 15 R. Swanberg XZ Andromedae 39744.668 +5,058 +0.060 16 W. Lowder 39744.673 +5,055 +0.065 20 L. Hazel 39748.742 +5,058 +0.062 16 R. Swanberg 39759.598 +5,066 +0.060 14 L. Hazel AB Andromedae 39672.771 +13,852 +0.058 9 M. Baldwin 39674.764 +13,858 +0.060 11 M. Baldwin 39675.762 +13,861 +0.062 13 M. Baldwin 39677.750 +13,867 +0.059 12 M. Baldwin 39679.737 +13,873 +0.055 11 M. Baldwin 39686.711 +13,894 +0.060 11 M. Baldwin 39694.679 +13,918 +0.062 12 M. Baldwin 39700.649 +13,936 +0.058 10 M. Baldwin 39701.648 +13,939 +0.060 10 M. Baldwin 39757.745 +14,108 +0.070 13 M. Baldwin 39761.724 +14,120 +0.066 11 M. Baldwin CX Aquarii 39707.737 +24,059 +0.021 14 R. Monske 39716.636 +24,075 +0.024 22 R. Monske 39737.760 +24,113 +0.021 14 R. Monske 39737.764 +24,113 +0.025 20 M. Baldwin 39756.668 +24,147 +0.025 13 M. Baldwin 39757.780 +24,149 +0.026 11 M. Baldwin 39761.672 +24,156 +0.026 15 M. Baldwin OO Aquilae 39671.650 +10,744.5 -0.031 10 M. Baldwin 39672.667 +10,746.5 -0.027 11 M. Baldwin 39674.690 +10,750.5 -0.031 13 M. Baldwin 39675.707 +10,752.5 -0.028 10 M. Baldwin 39677.730 +10,756.5 -0.032 9 M. Baldwin 39679.760 +10,760.5 -0.029 7 M. Baldwin 39695.724 +10,792 -0.029 10 S. Cook 39696.736 +10,794 -0.031 12 S. Cook 39714.736 +10,829.5 -0.022 10 R. Monske 39716.751 +10,833.5 -0.034 12 R. Monske 39735.756 +10,871 -0.034 11 R. Monske 39744.631 +10,888.5 -0.028 16 W. Lowder V346 Aquilae 39664.720 +7,534 -0.021 14 M. Baldwin 39674.680 +7,543 -0.018 17 M. Baldwin 39675.781 +7,544 -0.024 17 M. Baldwin 39715.617 +7,580 -0.016 14 R. Monske 39716.720 +7,581 -0.020 13 R. Monske 39736.635 +7,599 -0.019 14 R. Monske 39737.739 +7,600 -0.022 15 R. Monske WW Aurigae 39184.8586 +2,345 -0.0021 24pe L. Kalish SV Camelopardalis 39686.792 +12,476 -0.020 12 M. Baldwin 39737.801 +12,562 -0.015 13 M. Baldwin 39762.703 +12,604 -0.022 15 M. Baldwin 39765.668 +12,609 -0.022 15 F. Chapman 39771.604: +12,619 -0.017: 17 D. Livingston R Canis Majoris 39528.636 +3,533 +0.007 21 M. Baldwin RZ Cassiopeiae 39701.813 +18,696 -0.039 12 S. Cook 39737.6737 +18,726 -0.0367 pe A. Stokes 39749.6255 +18,736 -0.0374 pe A. Stokes 39761.572^1 +18,746 -0.043 6 J. Ashbrook 39767.560^1 +18,751 -0.031 5 J. Ashbrook 39785.481^1 +18,765 -0.039 3 J. Ashbrook 39786.680^1 +18,766 -0.035 15 J. Ashbrook 39805.808^1 +18,783 -0.032 12 J. Ashbrook 39822.524^1 +18,797 -0.049 6 J. Ashbrook 39823.728^1 +18,798 -0.041 7 J. Ashbrook 39841.659^1 +18,813 -0.038 4 J. Ashbrook TV Cassiopeiae 39704.802 +10,806 -0.004 11 F. Sanner AB Cassiopeiae 39745.606 +10,432 +0.068 22 L. Hazel ZZ Cygni 39759.594 +29,624 -0.001 16 L. Hazel V477 Cygni 39748.765 +2,941 -0.054 14 F. Sanner 39767.544 +2,949 -0.050 12 F. Sanner Z Draconis 39530.577 +4,613 +0.010 11 M. Baldwin 39534.648 +4,616 +0.008 14 M. Baldwin TY Delphini 39707.667 +9,812 -0.011 14 R. Monske 39738.630 +9,838 -0.017 16 R. Monske YY Delphini 39735.590 +17,577 +0.036 14 L. Hazel SZ Herculis^2 39654.624 +3,090 +0.014 16 D. Livingston 39667.706: +3,106 +0.007: 21 L. Hazel 39735.615 +3,189 +0.014 21 F. Chapman 39744.612 +3,200 +0.012 7 H. Blake 39744.614: +3,200 +0.014: 23 D. Livingston 39748.707 +3,205 +0.017 21 R. Swanberg 39757.704 +3,216 +0.015 17 M. Baldwin UX Herculis 39650.673 +12,767 -0.053 17 L. Hazel 39667.716 +12,778 -0.048 18 L. Hazel CT Herculis 39664.723 +4,904 +0.095 18 M. Baldwin SW Lacertae 39674.780 +50,830 +0.048 8 M. Baldwin 39675.744 +50,833 +0.050 16 M. Baldwin 39679.760 +50,845.5 +0.057 13 M. Baldwin 39686.811 +50,867.5 +0.051 15 M. Baldwin 39694.670 +50,892 +0.054 12 M. Baldwin 39701.726 +50,914 +0.054 16 M. Baldwin 39707.661 +50,932.5 +0.056 13 M. Baldwin 39737.804 +51,026.5 +0.051 19 M. Baldwin 39751.596 +51,069.5 +0.053 12 H. Blake 39752.561: +51,072.5 +0.055: 10 H. Blake 39756.732 +51,085.5 +0.057 20 R. Swanberg 39757.695 +51,088.5 +0.058 10 M. Baldwin 39761.706 +51,101 +0.060 20 M. Baldwin 39762.668 +51,104 +0.060 12 M. Baldwin 39764.578 +51,110 +0.046 15 F. Chapman 39766.664 +51,116.5 +0.047 11 F. Chapman 39770.676 +51,129 +0.051 20 R. Swanberg VX Lacertae 39736.648 +5,130 -0.022 14 L. Hazel UV Leonis 39558.683 +10,937 -0.007 12 M. Baldwin 39567.673 +10,952 -0.019 12 M. Baldwin FL Lyrae 39678.747 +2,673 +0.007 11 S. Cook RT Persei 39537.610 +7,475 -0.016 12 M. Baldwin ST Persei 39528.693 +3,776 -0.062 23 M. Baldwin UX Pegasi 39739.665 +7,323 -0.054 18 L. Hazel Beta Persei 39714.775 +610 +0.006 20 R. Monske 39717.639^1 +611 +0.003 13 J. Ashbrook 39734.836 +617 -0.004 66pe D. Henning and G. Gliba 39737.710^1 +618 +0.002 4 J. Ashbrook 39737.711 +618 +0.003 19 F. Sanner 39740.568^1 +619 -0.007 11 J. Ashbrook 39760.647 +626 +0.001 17 F. Sanner 39823.728^1 +648 +0.001 9 J. Ashbrook 39826.594^1 +649 -0.001 10 J. Ashbrook 39829.459^1 +650 -0.003 8 J. Ashbrook U Sagittae 39736.643 +6,687 +0.033 18 R. Monske V505 Sagittarii 39675.703 +5,208 -0.021 13 M. Baldwin 39694.633 +5,224 -0.017 7 M. Baldwin 39701.728 +5,230 -0.019 14 M. Baldwin 39707.654 +5,235 -0.007 7 M. Baldwin 39759.691 +5,279 -0.017 16 M. Baldwin RW Tauri 39534.618 +1,846 +0,007 24 M. Baldwin X Trianguli 39739.695 +5,192 +0.033 19 F. Chapman 39740.672 +5,193 +0.035 12 W. Lowder 39741.640 +5,194 +0.032 12 W. Lowder 39772.729 +5,226 +0.029 17 R. Swanberg 39777.586 +5,231 +0.031 19 F. Chapman W Ursae Minoris 36082.644^1 +1,543 +0.003 12 J. Ashbrook 37113.554^1 +2,149 +0.005 6 J. Ashbrook 37118.669^1 +2,152 +0.017 10 J. Ashbrook 37147.570^1 +2,169 -0.002 8 J. Ashbrook 39350.586^1 +3,464 +0.015 14 J. Ashbrook 39760.563^1 +3,705 +0.013 13 J. Ashbrook AW Vulpeculae 39734.660 +16,398 -0.015 13 R. Monske BU Vulpeculae 39735.705 +10,787 +0.048 19 R. Monske This work is sponsored by the American Association of Variable Star Observers, with David B. Williams as program coordinator. The reductions were made by the writers, except in some cases which were checked. L.J. ROBINSON and JOSEPH ASHBROOK "Sky and Telescope" 49 Bay State Rd. Cambridge, Mass. 02138, USA 1). Reduced with observer's mean light curve. 2). O-C's computed from elements in Sky and Tele. 25, 5, 277. 3). O-C's computed from elements in Sky and Tele. 27, 5, 316.