COMMISSION 27 OF THE I. A. U. INFORMATION BULLETIN ON VARIABLE STARS NUMBER 245 Konkoly Observatory Budapest 1968 January 10 Veroffentlichungen der Remeis-Sternwarte Bamberg Astronomisches Institut der Universitat Erlangen-Nurnberg Band VII, Nr. 63 THE PERIOD OF RV OCT (1906-1966) RV Oct is an RR-star (minimum at phase 0.68) with remarkable hump (at phase 0.19) in the decreasing branch (see IBVS 38, 1963 and IBVS 71, 1964). The Harvard plate material makes an investigation of period-constancy possible. All maxima before JD 2438196 estimated by Mr. Bauernfeind (Bamberg) originate from this material. Very good maxima are indicated by crosses. RV Oct: Max=JD 2415116.665+0.^d5711625*E Maxima E O-C 2415116.675++ 0 +0.014 5561.585 779 -0.015 5847.802 1280 +0.049 5915.714++ 1399 -0.007 5926.634 1418 +0.061 6605.715 2607 +0.029 6859.870 3052 +0.017 7375.583 3955 -0.030 7804.530 4706 -0.026 8117.567+ 5254 +0.014 8398.529 5746 -0.036 8824.634++ 6492 -0.018 9566.573 7791 -0.019 9943.564++ 8451 +0.005 2420248.587 8985 +0.027 0336.579 9139 +0.060 0610.650 9619 -0.027 0709.499 9792 +0.011 0959.665 10230 +0.008 0995.630 10293 -0.011 1007.625++ 10314 -0.010 1026.535 10347 +0.052 1332.666 10883 +0.040 1340.666 10897 +0.043 2483.519 12898 0.000 2523.501++ 12968 +0.001 3222.552 14192 -0.051 3234.561 14213 -0.037 3531.627 14733 +0.025 4674.563 16734 +0.065 4682.562 16748 +0.068 5776.278 18663 +0.007 5804.221 18712 -0.037 6035.532 19117 -0.046 6118.411++ 19262 +0.014 6562.222 20039 +0.032 6805.509++ 20465 +0.003 7186.443 21132 -0.028 8400.225 23257 +0.034 8639.496+ 23676 -0.012 8743.395 23858 -0.065 9000.434 24308 -0.049 9072.387 24434 -0.063 9076.455 24441 +0.007 9156.366+ 24581 -0.044 9318.543 24865 -0.077 9321.467+ 24870 -0.009 9381.417++ 24975 -0.031 9393.413+ 24996 -0.030 9405.432 25017 -0.005 9440.253++ 25078 -0.025 9480.259 25148 -0.001 9484.289 25155 +0.031 9489.353 25164 -0.045 9493.355++ 25171 -0.041 9520.303 25218 +0.062 9650.439++ 25446 -0.027 9738.443 25600 +0.018 9746.450 25614 +0.029 9806.352 25719 -0.041 9822.415 25747 +0.029 9849.233 25794 +0.003 9878.300 25845 -0.060 2430044.509 26136 -0.059 0116.480 26262 -0.054 0203.288 26414 -0.063 0548.416 27018 +0.083 0556.322 27032 -0.008 0826.493 27505 +0.003 0901.286+ 27636 -0.026 1215.401 28186 -0.050 1270.212 28282 -0.071 1291.352 28319 -0.064 1330.222 28387 -0.033 1699.244 29033 +0.018 1712.303+ 29056 -0.060 1874.522 29340 -0.051 1921.384 29422 -0.024 1993.402 29548 +0.028 2041.374 29632 +0.022 2329.479 30119 -0.029 2528.554 30485 0.000 2731.317 30840 +0.001 2969.468 31257 -0.023 3453.233 32104 -0.033 8196.190++ 40408 -0.009 8294.441++ 40580 +0.002 8314.410 40615 -0.020 8374.408++ 40720 -0.002 8439.492+ 40834 -0.022 8443.487+ 40841 -0.026 .531++ 40841 +0.018 8879.295 41604 -0.015 .317++ 41604 +0.007 .340 41604 +0.030 8883.276 41611 -0.032 .319++ 41611 +0.011 .384 41611 +0.076 8884.422 41613 -0.028 .443++ 41613 -0.007 8887.292 41618 -0.014 .314++ 41618 +0.008 .357 41618 +0.051 8902.220 41644 +0.064 8904.419 41648 -0.022 8911.274 41660 -0.021 .292++ 41660 -0.003 .317++ 41660 +0.022 .338+ 41660 +0.043 8915.292 41667 -0.001 .302++ 41667 +0.009 .327+ 41667 +0.034 .349 41667 +0.056 8916.391 41669 -0.044 .412 41669 -0.023 8935.267+ 41702 -0.017 8939.258 41709 -0.024 9173.489 42119 +0.031 .510 42119 +0.053 9181.406 42133 -0.049 .488 42133 +0.033 9201.407 42168 -0.038 9209.474++ 42182 +0.032 9229.453 42217 +0.021 9232.326++ 42222 +0.038 9240.323++ 42236 +0.039 9268.261 42285 -0.010 .284 42285 +0.013 .303++ 42285 +0.032 9292.256+ 42327 -0.004 9296.278 42334 +0.020 .299+ 42334 +0.041 9300.219 42341 -0.037 .240 42341 -0.016 .283++ 42341 +0.027 .326 42341 +0.070 9312.241+ 42362 -0.010 GCVS: type ?, spectral class ?, 11.^m7-12.^m2 pg Real looks the deviation (5%) from the average period between E=24000 and E=30000. Remeis-Observatory Bamberg, 1967 Dez. 30 W. STROHMEIER