| E | O (JD) | O (dat) | Period |
| -22 | 2435557 | 1956-03-24 | 241.31 |
| -21 | 2435788 | 1956-11-10 | 240.75 |
| -20 | 2436018 | 1957-06-28 | 238.17 |
| -19 | 2436264 | 1958-03-01 | 236.24 |
| -18 | 2436510 | 1958-11-02 | 236.71 |
| -17 | 2436748 | 1959-06-28 | 237.85 |
| -16 | 2436974 | 1960-02-09 | 237.43 |
| -15 | 2437211 | 1960-10-03 | 235.72 |
| -14 | 2437448 | 1961-05-28 | 234.65 |
| -13 | 2437688 | 1962-01-23 | 234.21 |
| -12 | 2437918 | 1962-09-10 | 234.78 |
| -11 | 2438156 | 1963-05-06 | 234.22 |
| -10 | 2438387 | 1963-12-23 | 233.57 |
| -9 | 2438614 | 1964-08-06 | 234.07 |
| -8 | 2438858 | 1965-04-07 | 234.28 |
| -7 | 2439080 | 1965-11-15 | 234.42 |
| -6 | 2439326 | 1966-07-19 | 235.43 |
| -5 | 2439557 | 1967-03-07 | 236.43 |
| -4 | 2439797 | 1967-11-02 | 236.65 |
| -3 | 2440028 | 1968-06-20 | 236.07 |
| -2 | 2440269 | 1969-02-16 | 235.85 |
| -1 | 2440513 | 1969-10-18 | 236.79 |
| 0 | 2440738 | 1970-05-31 | 236.72 |
| 1 | 2440973 | 1971-01-21 | 236.07 |
| 2 | 2441212 | 1971-09-17 | 235.07 |
| 3 | 2441457 | 1972-05-19 | 235.14 |
| 4 | 2441682 | 1972-12-30 | 235.65 |
| 5 | 2441920 | 1973-08-25 | 236.07 |
| 6 | 2442153 | 1974-04-15 | 235.79 |
| 7 | 2442390 | 1974-12-08 | 235.42 |
| 8 | 2442620 | 1975-07-26 | 236.07 |
| 9 | 2442870 | 1976-04-01 | 236.36 |
| 10 | 2443100 | 1976-11-17 | 236.57 |
| 11 | 2443335 | 1977-07-10 | 237.07 |
| 12 | 2443572 | 1978-03-04 | 236 |
| 13 | 2443810 | 1978-10-28 | 234.57 |
| 14 | 2444045 | 1979-06-20 | 235.57 |
| 15 | 2444284 | 1980-02-14 | 236.57 |
| 16 | 2444510 | 1980-09-27 | 236 |
| 17 | 2444744 | 1981-05-19 | 235.71 |
| 18 | 2444989 | 1982-01-19 | 235.71 |
| 19 | 2445230 | 1982-09-17 | 236.07 |
| 20 | 2445456 | 1983-05-01 | 236.86 |
| 21 | 2445699 | 1983-12-30 | 237 |
| 22 | 2445930 | 1984-08-17 | 236.57 |
| 23 | 2446169 | 1985-04-13 | 235.92 |
| 24 | 2446401 | 1985-12-01 | 236 |
| 25 | 2446650 | 1986-08-07 | 237.29 |
| 26 | 2446881 | 1987-03-26 | 237.57 |
| 27 | 2447108 | 1987-11-08 | 237.21 |
| 28 | 2447351 | 1988-07-08 | 236.42 |
| 29 | 2447600 | 1989-03-14 | 234.57 |
| 30 | 2447825 | 1989-10-25 | 234.65 |
| 31 | 2448066 | 1990-06-23 | 235.07 |
| 32 | 2448295 | 1991-02-07 | 233.64 |
| 33 | 2448520 | 1991-09-20 | 233.57 |
| 34 | 2448754 | 1992-05-11 | 234.07 |
| 35 | 2448996 | 1993-01-08 | 234.22 |
| 36 | 2449226 | 1993-08-26 | 235.43 |
| 37 | 2449469 | 1994-04-26 | 235.78 |
| 38 | 2449699 | 1994-12-12 | 235.35 |
| 39 | 2449941 | 1995-08-11 | 234.86 |
| 40 | 2450170 | 1996-03-27 | 233.86 |
| 41 | 2450405 | 1996-11-17 | 233.07 |
| 42 | 2450640 | 1997-07-10 | 232.85 |
| 43 | 2450870 | 1998-02-25 | 233 |
| 44 | 2451099 | 1998-10-12 | 233.36 |
| 45 | 2451332 | 1999-06-02 | 233.57 |
| 46 | 2451568 | 2000-01-24 | 234.53 |
| 47 | 2451805 | 2000-09-17 | 234.93 |
| 48 | 2452037 | 2001-05-07 | 235.71 |
| 49 | 2452278 | 2002-01-03 | 236.23 |
| 51 | 2452750 | 2003-04-20 | 236.53 |
| 52 | 2452978 | 2003-12-04 | 237.15 |
| 54 | 2453460 | 2005-03-30 | 237.15 |
| 55 | 2453692 | 2005-11-17 | 237.12 |
| 57 | 2454175 | 2007-03-15 | 237.72 |
| 58 | 2454410 | 2007-11-05 | 238.06 |
| 66 | 2456308 | 2013-01-15 | 237.73 |
| 67 | 2456545 | 2013-09-09 | 237.2 |
| 68 | 2456790 | 2014-05-12 | 236.93 |
| 69 | 2457028 | 2015-01-05 | 237.43 |
| 70 | 2457256 | 2015-08-21 | 237.22 |
| 71 | 2457490 | 2016-04-11 | 235 |
| 72 | 2457729 | 2016-12-06 | 233.71 |
| 73 | 2457975 | 2017-08-09 | 235 |
| 74 | 2458199 | 2018-03-21 | 235.5 |
| 75 | 2458426 | 2018-11-03 | 234.22 |
| 76 | 2458664 | 2019-06-29 | 232.65 |
| 77 | 2458910 | 2020-03-01 | 232.78 |
| 78 | 2459133 | 2020-10-10 | 234.55 |
| 79 | 2459365 | 2021-05-30 | 235.21 |
| 80 | 2459596 | 2022-01-16 | 231.92 |
| 81 | 2459837 | 2022-09-14 | 229.09 |
| 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. |