| E | O (JD) | O (dat) | Period |
| -91 | 2411330 | 1889-11-23 | 329.59 |
| -87 | 2412660 | 1893-07-15 | 329.58 |
| -81 | 2414630 | 1898-12-06 | 329.37 |
| -80 | 2414950 | 1899-10-22 | 329.36 |
| -79 | 2415294 | 1900-10-01 | 329.45 |
| -78 | 2415620 | 1901-08-23 | 329.44 |
| -77 | 2415948 | 1902-07-17 | 329.19 |
| -76 | 2416270 | 1903-06-04 | 329.29 |
| -75 | 2416605 | 1904-05-04 | 329.66 |
| -70 | 2418255 | 1908-11-09 | 329.65 |
| -69 | 2418582 | 1909-10-02 | 330.07 |
| -68 | 2418910 | 1910-08-26 | 330.52 |
| -67 | 2419235 | 1911-07-17 | 330.4 |
| -65 | 2419910 | 1913-05-22 | 330.67 |
| -60 | 2421555 | 1917-11-22 | 330.75 |
| -59 | 2421892 | 1918-10-25 | 331 |
| -57 | 2422560 | 1920-08-23 | 331.29 |
| -51 | 2424523 | 1926-01-07 | 331.63 |
| -49 | 2425206 | 1927-11-21 | 331.94 |
| -48 | 2425525 | 1928-10-05 | 332.61 |
| -47 | 2425870 | 1929-09-15 | 332.43 |
| -46 | 2426210 | 1930-08-21 | 332.65 |
| -45 | 2426550 | 1931-07-27 | 333.32 |
| -44 | 2426890 | 1932-07-01 | 332.64 |
| -40 | 2428210 | 1936-02-11 | 332.45 |
| -39 | 2428525 | 1936-12-22 | 331.46 |
| -38 | 2428864 | 1937-11-26 | 330.75 |
| -37 | 2429198 | 1938-10-26 | 330.65 |
| -36 | 2429531 | 1939-09-24 | 331.17 |
| -35 | 2429862 | 1940-08-20 | 332.55 |
| -34 | 2430184 | 1941-07-08 | 332.86 |
| -33 | 2430515 | 1942-06-04 | 331.99 |
| -32 | 2430860 | 1943-05-15 | 331.7 |
| -31 | 2431200 | 1944-04-19 | 331.25 |
| -30 | 2431531 | 1945-03-16 | 330.93 |
| -29 | 2431851 | 1946-01-30 | 331.25 |
| -28 | 2432175 | 1946-12-20 | 330.91 |
| -27 | 2432511 | 1947-11-21 | 329.36 |
| -26 | 2432836 | 1948-10-11 | 328.8 |
| -25 | 2433167 | 1949-09-07 | 328.76 |
| -24 | 2433511 | 1950-08-17 | 328.81 |
| -23 | 2433840 | 1951-07-12 | 328.64 |
| -16 | 2436130 | 1957-10-18 | 328.42 |
| -15 | 2436453 | 1958-09-06 | 328.47 |
| -14 | 2436784 | 1959-08-03 | 328.62 |
| -13 | 2437113 | 1960-06-27 | 328.69 |
| -12 | 2437439 | 1961-05-19 | 329.56 |
| -11 | 2437771 | 1962-04-16 | 332.56 |
| -10 | 2438107 | 1963-03-18 | 334.06 |
| -9 | 2438449 | 1964-02-23 | 334.86 |
| -8 | 2438777 | 1965-01-16 | 335.06 |
| -7 | 2439110 | 1965-12-15 | 335.62 |
| -6 | 2439457 | 1966-11-27 | 335.44 |
| -5 | 2439795 | 1967-10-31 | 334.68 |
| -4 | 2440125 | 1968-09-25 | 334.26 |
| -3 | 2440449 | 1969-08-15 | 334.02 |
| -2 | 2440795 | 1970-07-27 | 333.11 |
| -1 | 2441124 | 1971-06-21 | 332.15 |
| 0 | 2441450 | 1972-05-12 | 331.8 |
| 1 | 2441790 | 1973-04-17 | 332.14 |
| 2 | 2442120 | 1974-03-13 | 332.74 |
| 3 | 2442446 | 1975-02-02 | 332.65 |
| 4 | 2442779 | 1976-01-01 | 332.8 |
| 5 | 2443110 | 1976-11-27 | 332.81 |
| 6 | 2443450 | 1977-11-02 | 332.77 |
| 12 | 2445450 | 1983-04-25 | 332.85 |
| 13 | 2445780 | 1984-03-20 | 332.83 |
| 14 | 2446110 | 1985-02-13 | 332.47 |
| 15 | 2446440 | 1986-01-09 | 331.87 |
| 16 | 2446776 | 1986-12-11 | 330.64 |
| 17 | 2447106 | 1987-11-06 | 329.88 |
| 18 | 2447435 | 1988-09-30 | 329.81 |
| 19 | 2447760 | 1989-08-21 | 329.77 |
| 25 | 2449750 | 1995-02-01 | 330.02 |
| 26 | 2450060 | 1995-12-08 | 330.17 |
| 27 | 2450400 | 1996-11-12 | 331.13 |
| 28 | 2450730 | 1997-10-08 | 331.84 |
| 32 | 2452050 | 2001-05-20 | 332.42 |
| 37 | 2453710 | 2005-12-05 | 332.81 |
| 38 | 2454042 | 2006-11-02 | 333.22 |
| 45 | 2456390 | 2013-04-07 | 333.41 |
| 46 | 2456730 | 2014-03-13 | 333.86 |
| 47 | 2457062 | 2015-02-08 | 334.73 |
| 48 | 2457384 | 2015-12-27 | 335.48 |
| 49 | 2457726 | 2016-12-03 | 335.47 |
| 50 | 2458066 | 2017-11-08 | 335.35 |
| 51 | 2458403 | 2018-10-11 | 335.38 |
| 52 | 2458746 | 2019-09-19 | 335.83 |
| 53 | 2459080 | 2020-08-18 | 336.31 |
| 54 | 2459402 | 2021-07-06 | 335.29 |
| 55 | 2459739 | 2022-06-08 | 334.17 |
| 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. |