COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS NUMBER 187 Konkoly Observatory Budapest 27 February 1967 MINIMA OF ECLIPSING VARIABLES Given are 125 observed minima for 15 eclipsing variable stars. All are visual (v) and photographic (pg) estimates reduced by the tracing-paper method and by fitting the observations to the mean light curve. Elements in the General Catalogue of Variable Stars were used to compute O-C' s unless otherwise specified. The number of estimates used is given under n. J. D. hel. O-C E n Observer (2430000) WZ Andromedae 9004,440 pg +0,005d 18811 21 Todoran 9006,522 " 0,000 18814 23 " 9041,312 " +0,007 18864 9 " 9324,445 " +0,006 19271 9 " 9381,492 " +0,008 19353 12 " XZ Andromedae 8262,498 v +0,029 3963 15 Popa 8345,299 " +0,037 4024 11 " TV Cassiopeiae 8972,515 v +0,004 104020 17 Popa 8981,579 " +0,005 104070 14 " AB Cassiopeiae 1) 7580,477 v +0,008 8848 25 Popa 8269,390 " +0,015 9352 25 " 8310,395 " +0,014 9382 12 " 8981,527 " +0,007 9873 31 " 9022,534 " +0,008 9903 24 J. D. hel. O-C E n Observer (2430000) U Cephei 8271,562 v +0,097 12187 11 Popa 8286,522 " +0,099 12193 10 " 8291,508 " +0,099 12195 10 " 8306,463 " +0,097 12201 20 " 8311,448 " +0,095 12203 9 " 8316.434 " +0,095 12205 8 " 8336,378 " +0,095 12213 7 " 8969,615 " +0,119 12467 16 " 8979,587 " +0,120 12471 19 " 9029,444 " +0,117 12491 13 " 9034,430 " +0,117 12493 15 " 9049,389 " +0.118 12499 12 " 9094,259 " +0.115 12517 16 " ZZ Cygni 2) 8920,3830 pg +0,0046 28289 7 Todoran 8969,426 v +0,010 28367 19 Popa 8976,3310 " +0,0057 28378 7 Todoran 8979,4755 " +0,0074 28383 8 " 8981,3603 " +0,0062 28386 8 " 8988,2755 " +0,0066 28397 5 " 9013.4165 pg +0.0029 28437 12 " 9030,3920 v +0.0058 28464 5 " 9032.2757 " +0,0036 28467 12 " 9035,4200 " +0,0049 28472 9 " 9037,3080 " +0,0070 28475 9 " 9093,2490 pg +0,0012 28564 15 " 9289.3780 " +0.0020 28876 12 " 9292,5210 " +0,0019 28881 9 " 9326,4660 " +0,0017 28935 13 " 9357,2695 " +0,0030 28984 6 " 9380,5290 " +0,0037 29021 4 " J. D. hel. O-C E n Observer (2430000) Z Draconis 8937,377 v +0,010 4176 5 Todoran 8975,386 pg +0,011 4204 10 " 9256,374 " +0,009 4411 6 " 9294,381 " +0,008 4439 5 " 9321,532 " +0,010 4459 5 " 9404,336 " +0,011 4520 8 " RZ Draconis 3) 7149,497 v +0,005 13979 8 Popa 7197,422 " +0,004 14066 11 " 7213,397 " +0,003 14095 15 " 8198,365 " +0,004 15883 8 " 8199,463 " 0,000 15885 10 " 8209,378 " -0,001 15903 9 Todoran 8210,480 " -0,001 15905 5 " 8210.482 " +0,001 15905 10 Popa 8215,447 " +0,009 15914 8 " 8220,398 " +0,002 15923 7 " 8247,389 pg 0,000 15972 10 Todoran 8248,490 " -0,001 15974 7 " 8258,406 v -0,001 15992 5 " 8306,334 pg +0,001 16079 7 " 8605,465 v +0,006 16622 10 Popa 8885,305 " +0,001 17130 95 " 8885,308 pg +0,003 17130 5 Todoran 8885,302 v -0,003 17130 9 " 8951,410 " 0,000 17250 14 Popa 8972,342 " -0,001 17288 12 " 8977,300 " -0,001 17297 12 " 8978,411 " +0,008 17299 13 " 9021,371 pg 0,000 17377 11 Todoran 9022,473 v 0,000 17379 8 " 9022,481 " +0,008 17379 18 Popa 9032,390 " +0,001 17397 10 " 9032,394 " +0,005 17397 9 Todoran 9037,347 " +0,001 17406 13 " 9074,256 pg +0,001 17473 12 " J. D. hel: O-C E n Observer (2430000) TU Herculis 4) 8142,484 pg 0,002 300 9 Todoran 8210,492 " 0,000 330 13 " 8956,307 " -0,018 659 10 " 9033,378 " -0,024 693 7 " 9289,552 " -0,018 806 8 " 9339,424 " -0,020 828 6 " 9380,230 " -0,019 846 10 " 9389,298 " -0,019 850 9 " RV Lyrae 5) 7914,468 pg -0,002 920 8 Todoran 8184,396 " -0,001 995 9 " 8605,484 " -0,001 1112 8 " 8670,263 " -0,003 1130 14 " 8983,379 " -0,002 1217 4 " 9037,364 " -0,002 1232 19 " 9260,504 " -0,002 1294 8 " Z Persei 8663,341 pg -0,056 2575 9 Todoran 8669,455 " -0,055 2577 15 RT Persei 6) 7564,466 v +0,008 4862 10 Popa 7565,315 " +0,007 4863 10 " 9013,5313 pg -0,0082 6568 10 Todoran 9030,5225 " -0,0050 6588 9 " 9037,3160 v -0,0067 6596 8 " 9071,2900 pg -0,0088 6636 7 " 9093,3740 " -0,0093 6662 8 " 9381,3270 " -0,0038 7001 7 " J. D. hel. O-C E n Observer (2430000) XZ Persei 8684,430 pg 0,000d 11752 13 Todoran 8714,374 " +0,002 11778 6 9390,390 " +0,009 12365 8 X Trianguli 7) 7151,528 v +0,004 14852 15 Popa 7192,333 " +0,004 14894 18 " 8316,401 " +0,008 16051 5 Todoran 8318,346 " +0,010 16053 5 " 8319,310 " +0,003 16054 21 Popa 8320,280 " +0,001 16055 21 " 8658,378 pg +0,005 16403 6 Todoran 9030,478 v +0,008 16786 12 " 9032,417 " +0,004 16788 13 " 9033,390 " +0,006 16789 10 " 9034,338 " -0,018 16790 22 Popa 9096,543 pg +0,009 16854 12 Todoran 9373,426 " +0,005 17139 6 " UX Ursae Majoris 9265,4004 pg -0,0075 60630 4 Todoran 9268,3546 " -0,0033 60645 5 " 9277,4003 " -0,0045 60691 6 " 9285,4640 " -0,0044 60732 6 " 9291,3650 " -0,0035 60762 5 " Notes: Elements not contained in the GCVS: 1) 2425486,4254 + 1.3668562d . E +1.262d.10-9 .E^2 2) 2421137,4377 + 0.62861764d . E -2.961d.10-11. E^2 3) 2429448,787 + 0.55087668d . E 4) 2437462,3909 + 2.2669718d . E 5) 2434603,3674 + 3.599025d . E 6) 2433434,6624 + 0.84940272d . E 7) 2422722,3107 + 0.97153337d . E I. TODORAN Astronomical Observatory I. POPA Cluj, Rumania