| E | O (JD) | O (dat) | Period |
| -63 | 2410854 | 1888-08-04 | 453.46 |
| -59 | 2412683 | 1893-08-07 | 452.45 |
| -58 | 2413120 | 1894-10-18 | 451.88 |
| -56 | 2414040 | 1897-04-25 | 451.85 |
| -55 | 2414492 | 1898-07-21 | 451.29 |
| -54 | 2414929 | 1899-10-01 | 450.55 |
| -52 | 2415830 | 1902-03-21 | 448.92 |
| -51 | 2416280 | 1903-06-14 | 448.71 |
| -50 | 2416739 | 1904-09-15 | 447.98 |
| -47 | 2418080 | 1908-05-18 | 448.3 |
| -46 | 2418515 | 1909-07-27 | 448.77 |
| -45 | 2418960 | 1910-10-15 | 449.57 |
| -42 | 2420315 | 1914-07-01 | 450.33 |
| -41 | 2420760 | 1915-09-19 | 449.99 |
| -38 | 2422115 | 1919-06-05 | 449.85 |
| -37 | 2422569 | 1920-09-01 | 450.03 |
| -36 | 2423046 | 1921-12-22 | 449.8 |
| -35 | 2423498 | 1923-03-19 | 449.3 |
| -30 | 2425710 | 1929-04-08 | 449.38 |
| -29 | 2426150 | 1930-06-22 | 449.41 |
| -28 | 2426616 | 1931-10-01 | 449.7 |
| -27 | 2427063 | 1932-12-21 | 450.57 |
| -26 | 2427510 | 1934-03-13 | 453.01 |
| -25 | 2427979 | 1935-06-25 | 457.52 |
| -24 | 2428441 | 1936-09-29 | 456.08 |
| -23 | 2428897 | 1937-12-29 | 456.14 |
| -22 | 2429369 | 1939-04-15 | 456.34 |
| -21 | 2429821 | 1940-07-10 | 454.27 |
| -20 | 2430267 | 1941-09-29 | 452.69 |
| -19 | 2430681 | 1942-11-17 | 452.02 |
| -18 | 2431180 | 1944-03-30 | 451.54 |
| -17 | 2431630 | 1945-06-23 | 450.49 |
| -14 | 2432963 | 1949-02-15 | 450.47 |
| -13 | 2433421 | 1950-05-19 | 450.28 |
| -12 | 2433878 | 1951-08-19 | 449.76 |
| -11 | 2434327 | 1952-11-10 | 447.61 |
| -10 | 2434759 | 1954-01-16 | 447.49 |
| -9 | 2435216 | 1955-04-18 | 447.07 |
| -8 | 2435657 | 1956-07-02 | 446.65 |
| -7 | 2436099 | 1957-09-17 | 446.88 |
| -6 | 2436552 | 1958-12-14 | 447.65 |
| -5 | 2437002 | 1960-03-08 | 448.98 |
| -4 | 2437441 | 1961-05-21 | 449.84 |
| -3 | 2437898 | 1962-08-21 | 450.66 |
| -2 | 2438350 | 1963-11-16 | 451.14 |
| -1 | 2438799 | 1965-02-07 | 452.04 |
| 0 | 2439257 | 1966-05-11 | 453.13 |
| 1 | 2439714 | 1967-08-11 | 453.31 |
| 2 | 2440156 | 1968-10-26 | 453.2 |
| 3 | 2440607 | 1970-01-20 | 453.77 |
| 4 | 2441076 | 1971-05-04 | 453.55 |
| 5 | 2441532 | 1972-08-02 | 453.05 |
| 6 | 2441968 | 1973-10-12 | 452.9 |
| 7 | 2442428 | 1975-01-15 | 453.86 |
| 8 | 2442892 | 1976-04-23 | 454.75 |
| 9 | 2443331 | 1977-07-06 | 455.02 |
| 10 | 2443782 | 1978-09-30 | 456.11 |
| 11 | 2444237 | 1979-12-29 | 458.14 |
| 12 | 2444709 | 1981-04-14 | 458.79 |
| 13 | 2445176 | 1982-07-25 | 459.6 |
| 14 | 2445625 | 1983-10-17 | 459.24 |
| 15 | 2446084 | 1985-01-18 | 459.91 |
| 16 | 2446559 | 1986-05-08 | 459.65 |
| 17 | 2447011 | 1987-08-03 | 458.83 |
| 18 | 2447471 | 1988-11-05 | 458.18 |
| 19 | 2447897 | 1990-01-05 | 458.51 |
| 20 | 2448394 | 1991-05-17 | 457.95 |
| 21 | 2448845 | 1992-08-10 | 456.94 |
| 22 | 2449299 | 1993-11-07 | 456.55 |
| 23 | 2449749 | 1995-01-31 | 457.02 |
| 24 | 2450218 | 1996-05-14 | 456.05 |
| 25 | 2450668 | 1997-08-07 | 453.09 |
| 26 | 2451116 | 1998-10-29 | 452.34 |
| 27 | 2451566 | 2000-01-22 | 451.48 |
| 28 | 2452044 | 2001-05-14 | 450.33 |
| 29 | 2452467 | 2002-07-11 | 448.62 |
| 30 | 2452911 | 2003-09-28 | 447.62 |
| 31 | 2453366 | 2004-12-26 | 446.85 |
| 32 | 2453817 | 2006-03-22 | 445.83 |
| 33 | 2454260 | 2007-06-08 | 445.32 |
| 34 | 2454700 | 2008-08-21 | 446.35 |
| 35 | 2455143 | 2009-11-07 | 446.16 |
| 36 | 2455593 | 2011-01-31 | 445.86 |
| 37 | 2456035 | 2012-04-17 | 446.34 |
| 38 | 2456490 | 2013-07-16 | 446.74 |
| 39 | 2456935 | 2014-10-04 | 447.5 |
| 40 | 2457379 | 2015-12-22 | 448.2 |
| 41 | 2457826 | 2017-03-13 | 448.29 |
| 42 | 2458280 | 2018-06-10 | 448.6 |
| 43 | 2458720 | 2019-08-24 | 448.5 |
| 44 | 2459177 | 2020-11-23 | 449.21 |
| 45 | 2459631 | 2022-02-20 | 450.09 |
| 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. |