| E | O (JD) | O (dat) | Period |
| -132 | 2422356 | 1920-02-01 | 169.93 |
| -131 | 2422504 | 1920-06-28 | 169.75 |
| -130 | 2422676 | 1920-12-17 | 169.27 |
| -129 | 2422847 | 1921-06-06 | 168.66 |
| -120 | 2424380 | 1925-08-17 | 170 |
| -119 | 2424546 | 1926-01-30 | 170.61 |
| -117 | 2424880 | 1926-12-30 | 169.6 |
| -115 | 2425220 | 1927-12-05 | 169.17 |
| -112 | 2425760 | 1929-05-28 | 169 |
| -111 | 2425903 | 1929-10-18 | 170.08 |
| -110 | 2426065 | 1930-03-29 | 170.61 |
| -109 | 2426237 | 1930-09-17 | 168.05 |
| -106 | 2426745 | 1932-02-07 | 167.56 |
| -105 | 2426933 | 1932-08-13 | 169.78 |
| -104 | 2427091 | 1933-01-18 | 169.88 |
| -103 | 2427250 | 1933-06-26 | 170.19 |
| -102 | 2427429 | 1933-12-22 | 169.29 |
| -101 | 2427595 | 1934-06-06 | 168.28 |
| -100 | 2427765 | 1934-11-23 | 168.64 |
| -99 | 2427940 | 1935-05-17 | 169.15 |
| -98 | 2428108 | 1935-11-01 | 169.15 |
| -97 | 2428272 | 1936-04-13 | 169.15 |
| -96 | 2428430 | 1936-09-18 | 169.14 |
| -22 | 2440965 | 1971-01-13 | 169.12 |
| -20 | 2441292 | 1971-12-06 | 169.16 |
| -19 | 2441470 | 1972-06-01 | 169.21 |
| -18 | 2441635 | 1972-11-13 | 169.09 |
| -17 | 2441810 | 1973-05-07 | 168.13 |
| -16 | 2441974 | 1973-10-18 | 169 |
| -15 | 2442140 | 1974-04-02 | 168.93 |
| -14 | 2442304 | 1974-09-13 | 168.43 |
| -13 | 2442475 | 1975-03-03 | 168.08 |
| -12 | 2442653 | 1975-08-28 | 168.93 |
| -11 | 2442817 | 1976-02-08 | 169.43 |
| -10 | 2442986 | 1976-07-26 | 169.35 |
| -9 | 2443151 | 1977-01-07 | 169.14 |
| -8 | 2443328 | 1977-07-03 | 168.43 |
| -7 | 2443488 | 1977-12-10 | 168.58 |
| -6 | 2443662 | 1978-06-02 | 168.5 |
| -5 | 2443834 | 1978-11-21 | 167.85 |
| -4 | 2443994 | 1979-04-30 | 168.64 |
| -3 | 2444169 | 1979-10-22 | 168.5 |
| -2 | 2444327 | 1980-03-28 | 167.29 |
| -1 | 2444502 | 1980-09-19 | 168.43 |
| 0 | 2444675 | 1981-03-11 | 169.07 |
| 1 | 2444834 | 1981-08-17 | 169.07 |
| 2 | 2445004 | 1982-02-03 | 169.65 |
| 3 | 2445182 | 1982-07-31 | 169.5 |
| 4 | 2445348 | 1983-01-13 | 170.14 |
| 5 | 2445515 | 1983-06-29 | 170.78 |
| 6 | 2445689 | 1983-12-20 | 171.14 |
| 7 | 2445861 | 1984-06-09 | 171 |
| 8 | 2446030 | 1984-11-25 | 170.43 |
| 9 | 2446199 | 1985-05-13 | 170.35 |
| 10 | 2446383 | 1985-11-13 | 170.35 |
| 11 | 2446541 | 1986-04-20 | 170.5 |
| 12 | 2446708 | 1986-10-04 | 169.93 |
| 13 | 2446881 | 1987-03-26 | 168.58 |
| 14 | 2447054 | 1987-09-15 | 169.07 |
| 15 | 2447224 | 1988-03-03 | 170 |
| 16 | 2447384 | 1988-08-10 | 169.64 |
| 17 | 2447558 | 1989-01-31 | 169.15 |
| 18 | 2447733 | 1989-07-25 | 168.86 |
| 19 | 2447896 | 1990-01-04 | 169.85 |
| 20 | 2448068 | 1990-06-25 | 170.35 |
| 21 | 2448235 | 1990-12-09 | 168.93 |
| 22 | 2448407 | 1991-05-30 | 168.58 |
| 23 | 2448579 | 1991-11-18 | 169.36 |
| 24 | 2448748 | 1992-05-05 | 169.93 |
| 25 | 2448908 | 1992-10-12 | 169.5 |
| 26 | 2449081 | 1993-04-03 | 169.07 |
| 27 | 2449254 | 1993-09-23 | 169.43 |
| 28 | 2449428 | 1994-03-16 | 169.86 |
| 29 | 2449587 | 1994-08-22 | 170.35 |
| 30 | 2449766 | 1995-02-17 | 169.93 |
| 31 | 2449933 | 1995-08-03 | 169.28 |
| 32 | 2450101 | 1996-01-18 | 169.08 |
| 33 | 2450273 | 1996-07-08 | 168.93 |
| 34 | 2450441 | 1996-12-23 | 168.78 |
| 35 | 2450611 | 1997-06-11 | 168.93 |
| 36 | 2450771 | 1997-11-18 | 168.5 |
| 37 | 2450947 | 1998-05-13 | 168.36 |
| 38 | 2451115 | 1998-10-28 | 168.29 |
| 39 | 2451284 | 1999-04-15 | 168.93 |
| 40 | 2451449 | 1999-09-27 | 169.85 |
| 41 | 2451622 | 2000-03-18 | 170.07 |
| 42 | 2451786 | 2000-08-29 | 170.5 |
| 43 | 2451961 | 2001-02-20 | 170.58 |
| 44 | 2452135 | 2001-08-13 | 169.64 |
| 45 | 2452308 | 2002-02-02 | 169.28 |
| 46 | 2452478 | 2002-07-22 | 169.35 |
| 47 | 2452643 | 2003-01-03 | 169.29 |
| 48 | 2452803 | 2003-06-12 | 168.58 |
| 49 | 2452975 | 2003-12-01 | 167.5 |
| 50 | 2453143 | 2004-05-17 | 167.35 |
| 51 | 2453323 | 2004-11-13 | 168.14 |
| 52 | 2453480 | 2005-04-19 | 168.43 |
| 53 | 2453651 | 2005-10-07 | 167.65 |
| 54 | 2453813 | 2006-03-18 | 167.28 |
| 55 | 2453987 | 2006-09-08 | 167.28 |
| 56 | 2454149 | 2007-02-17 | 168.14 |
| 57 | 2454316 | 2007-08-03 | 168.22 |
| 58 | 2454492 | 2008-01-26 | 167.72 |
| 59 | 2454653 | 2008-07-05 | 168.14 |
| 60 | 2454832 | 2008-12-31 | 168.85 |
| 61 | 2454987 | 2009-06-04 | 168.64 |
| 62 | 2455161 | 2009-11-25 | 168.72 |
| 63 | 2455329 | 2010-05-12 | 168.79 |
| 64 | 2455500 | 2010-10-30 | 169.85 |
| 65 | 2455669 | 2011-04-17 | 170.57 |
| 66 | 2455838 | 2011-10-03 | 169.85 |
| 67 | 2456010 | 2012-03-23 | 170 |
| 68 | 2456187 | 2012-09-16 | 170 |
| 69 | 2456349 | 2013-02-25 | 170.14 |
| 70 | 2456519 | 2013-08-14 | 170.14 |
| 71 | 2456690 | 2014-02-01 | 169.28 |
| 72 | 2456859 | 2014-07-20 | 169.36 |
| 73 | 2457030 | 2015-01-07 | 169.79 |
| 74 | 2457200 | 2015-06-26 | 170.28 |
| 75 | 2457367 | 2015-12-10 | 170.35 |
| 76 | 2457540 | 2016-05-31 | 170 |
| 77 | 2457705 | 2016-11-12 | 170.43 |
| 78 | 2457888 | 2017-05-14 | 170.29 |
| 79 | 2458046 | 2017-10-19 | 169.57 |
| 80 | 2458223 | 2018-04-14 | 169.93 |
| 81 | 2458393 | 2018-10-01 | 170.43 |
| 82 | 2458558 | 2019-03-15 | 170.22 |
| 83 | 2458723 | 2019-08-27 | 169.79 |
| 84 | 2458901 | 2020-02-21 | 169.43 |
| 85 | 2459078 | 2020-08-16 | 169.93 |
| 86 | 2459239 | 2021-01-24 | 171 |
| 87 | 2459407 | 2021-07-11 | 171.3 |
| 88 | 2459581 | 2022-01-01 | 168.83 |
| 89 | 2459749 | 2022-06-18 | 169.07 |
| 90 | 2459926 | 2022-12-12 | 170.68 |
| E | Cycle number from the GCVS4 epoch. |
| O (JD) | Julian date at observed time for maximum. |
| O (Dat) | Same as above, expressed as date. |
| Period | Calculated mean period at cycle number E. |