| E | O (JD) | O (dat) | Period |
| -80 | 2414960 | 1899-11-01 | 328.55 |
| -78 | 2415610 | 1901-08-13 | 328.94 |
| -77 | 2415955 | 1902-07-24 | 328.5 |
| -76 | 2416270 | 1903-06-04 | 328.33 |
| -70 | 2418245 | 1908-10-30 | 329.87 |
| -69 | 2418580 | 1909-09-30 | 330.27 |
| -68 | 2418895 | 1910-08-11 | 330.45 |
| -67 | 2419235 | 1911-07-17 | 331.08 |
| -51 | 2424530 | 1926-01-14 | 331.63 |
| -49 | 2425200 | 1927-11-15 | 332.5 |
| -48 | 2425530 | 1928-10-10 | 333.48 |
| -47 | 2425870 | 1929-09-15 | 333.97 |
| -46 | 2426210 | 1930-08-21 | 333.81 |
| -45 | 2426560 | 1931-08-06 | 333.5 |
| -44 | 2426910 | 1932-07-21 | 333 |
| -40 | 2428210 | 1936-02-11 | 332.25 |
| -39 | 2428530 | 1936-12-27 | 331.5 |
| -38 | 2428870 | 1937-12-02 | 329 |
| -37 | 2429190 | 1938-10-18 | 329.26 |
| -36 | 2429535 | 1939-09-28 | 330.06 |
| -35 | 2429865 | 1940-08-23 | 329.94 |
| -34 | 2430185 | 1941-07-09 | 329.94 |
| -16 | 2436130 | 1957-10-18 | 329.73 |
| -15 | 2436453 | 1958-09-06 | 329.37 |
| -14 | 2436784 | 1959-08-03 | 329.75 |
| -13 | 2437113 | 1960-06-27 | 330.35 |
| -12 | 2437439 | 1961-05-19 | 331.64 |
| -11 | 2437771 | 1962-04-16 | 332.14 |
| -10 | 2438107 | 1963-03-18 | 333.56 |
| -9 | 2438449 | 1964-02-23 | 335.71 |
| -8 | 2438777 | 1965-01-16 | 336.43 |
| -7 | 2439110 | 1965-12-15 | 335.43 |
| -6 | 2439457 | 1966-11-27 | 334.86 |
| -5 | 2439795 | 1967-10-31 | 335.22 |
| -4 | 2440125 | 1968-09-25 | 334.79 |
| -3 | 2440449 | 1969-08-15 | 333.79 |
| -2 | 2440795 | 1970-07-27 | 332.71 |
| -1 | 2441124 | 1971-06-21 | 331.85 |
| 0 | 2441450 | 1972-05-12 | 332.21 |
| 1 | 2441790 | 1973-04-17 | 331.78 |
| 2 | 2442120 | 1974-03-13 | 331.49 |
| 3 | 2442446 | 1975-02-02 | 332.94 |
| 4 | 2442779 | 1976-01-01 | 332.92 |
| 5 | 2443110 | 1976-11-27 | 332.5 |
| 6 | 2443450 | 1977-11-02 | 332.67 |
| 12 | 2445450 | 1983-04-25 | 332.96 |
| 13 | 2445780 | 1984-03-20 | 333.05 |
| 14 | 2446110 | 1985-02-13 | 332.55 |
| 15 | 2446440 | 1986-01-09 | 331.32 |
| 16 | 2446776 | 1986-12-11 | 330.53 |
| 17 | 2447106 | 1987-11-06 | 330 |
| 18 | 2447435 | 1988-09-30 | 329.59 |
| 19 | 2447760 | 1989-08-21 | 329.75 |
| 25 | 2449750 | 1995-02-01 | 329.55 |
| 26 | 2450060 | 1995-12-08 | 329.97 |
| 27 | 2450400 | 1996-11-12 | 330.45 |
| 28 | 2450730 | 1997-10-08 | 331.33 |
| 32 | 2452050 | 2001-05-20 | 332.75 |
| 37 | 2453710 | 2005-12-05 | 333.3 |
| 38 | 2454042 | 2006-11-02 | 332.9 |
| 45 | 2456390 | 2013-04-07 | 333.24 |
| 46 | 2456730 | 2014-03-13 | 334.4 |
| 47 | 2457062 | 2015-02-08 | 335.27 |
| 48 | 2457384 | 2015-12-27 | 335.85 |
| 49 | 2457726 | 2016-12-03 | 336.14 |
| 50 | 2458066 | 2017-11-08 | 334.99 |
| 51 | 2458403 | 2018-10-11 | 335.35 |
| 52 | 2458746 | 2019-09-19 | 336.65 |
| 53 | 2459080 | 2020-08-18 | 336.56 |
| 54 | 2459402 | 2021-07-06 | 335.75 |
| 55 | 2459739 | 2022-06-08 | 335.51 |
| 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. |