| E | O (JD) | O (dat) | Period |
| -57 | 2413960 | 1897-02-04 | 517.08 |
| -55 | 2415020 | 1899-12-31 | 516.52 |
| -54 | 2415530 | 1901-05-25 | 515.73 |
| -53 | 2416040 | 1902-10-17 | 515.71 |
| -52 | 2416561 | 1904-03-21 | 515.88 |
| -50 | 2417585 | 1907-01-09 | 515.41 |
| -48 | 2418620 | 1909-11-09 | 514.69 |
| -45 | 2420160 | 1914-01-27 | 514.83 |
| -44 | 2420681 | 1915-07-02 | 514.46 |
| -43 | 2421202 | 1916-12-04 | 513.96 |
| -42 | 2421697 | 1918-04-13 | 513.98 |
| -40 | 2422736 | 1921-02-15 | 512.73 |
| -39 | 2423251 | 1922-07-15 | 511.65 |
| -38 | 2423750 | 1923-11-26 | 510.78 |
| -37 | 2424265 | 1925-04-24 | 510.29 |
| -36 | 2424791 | 1926-10-02 | 509.79 |
| -35 | 2425275 | 1928-01-29 | 508.18 |
| -34 | 2425788 | 1929-06-25 | 507.35 |
| -33 | 2426301 | 1930-11-20 | 507.55 |
| -32 | 2426812 | 1932-04-14 | 507.76 |
| -31 | 2427311 | 1933-08-26 | 508.35 |
| -30 | 2427817 | 1935-01-14 | 509.73 |
| -29 | 2428318 | 1936-05-29 | 509.9 |
| -28 | 2428839 | 1937-11-01 | 509.81 |
| -27 | 2429358 | 1939-04-04 | 509.7 |
| -26 | 2429870 | 1940-08-28 | 509.64 |
| -25 | 2430377 | 1942-01-17 | 509.33 |
| -24 | 2430887 | 1943-06-11 | 508.98 |
| -23 | 2431388 | 1944-10-24 | 507.95 |
| -22 | 2431892 | 1946-03-12 | 507.25 |
| -21 | 2432398 | 1947-07-31 | 506.84 |
| -20 | 2432911 | 1948-12-25 | 506.56 |
| -19 | 2433423 | 1950-05-21 | 506.6 |
| -18 | 2433928 | 1951-10-08 | 506.61 |
| -17 | 2434432 | 1953-02-23 | 506.72 |
| -16 | 2434934 | 1954-07-10 | 506.97 |
| -15 | 2435438 | 1955-11-26 | 507.57 |
| -14 | 2435950 | 1957-04-21 | 508.61 |
| -13 | 2436452 | 1958-09-05 | 509.93 |
| -12 | 2436966 | 1960-02-01 | 511.28 |
| -11 | 2437480 | 1961-06-29 | 511.71 |
| -10 | 2437998 | 1962-11-29 | 512.16 |
| -9 | 2438512 | 1964-04-26 | 512.6 |
| -8 | 2439024 | 1965-09-20 | 512.73 |
| -7 | 2439539 | 1967-02-17 | 512.46 |
| -6 | 2440036 | 1968-06-28 | 511.66 |
| -5 | 2440555 | 1969-11-29 | 510.82 |
| -4 | 2441074 | 1971-05-02 | 510.2 |
| -3 | 2441580 | 1972-09-19 | 510 |
| -2 | 2442095 | 1974-02-16 | 509.6 |
| -1 | 2442595 | 1975-07-01 | 509.69 |
| 0 | 2443103 | 1976-11-20 | 508.85 |
| 1 | 2443611 | 1978-04-12 | 508.52 |
| 2 | 2444126 | 1979-09-09 | 508.69 |
| 3 | 2444630 | 1981-01-25 | 509.11 |
| 4 | 2445144 | 1982-06-23 | 509.89 |
| 5 | 2445648 | 1983-11-09 | 510.62 |
| 6 | 2446159 | 1985-04-03 | 511.51 |
| 7 | 2446668 | 1986-08-25 | 512.02 |
| 8 | 2447185 | 1988-01-24 | 513.16 |
| 9 | 2447696 | 1989-06-18 | 514.28 |
| 10 | 2448215 | 1990-11-19 | 514.75 |
| 11 | 2448733 | 1992-04-20 | 514.85 |
| 12 | 2449241 | 1993-09-10 | 514.56 |
| 13 | 2449763 | 1995-02-14 | 514.14 |
| 14 | 2450285 | 1996-07-20 | 514.66 |
| 15 | 2450785 | 1997-12-02 | 514.95 |
| 16 | 2451300 | 1999-05-01 | 514.95 |
| 17 | 2451809 | 2000-09-21 | 515.38 |
| 18 | 2452325 | 2002-02-19 | 515.33 |
| 19 | 2452857 | 2003-08-05 | 516.32 |
| 20 | 2453373 | 2005-01-02 | 517.95 |
| 21 | 2453879 | 2006-05-23 | 518.97 |
| 22 | 2454400 | 2007-10-26 | 518.57 |
| 23 | 2454913 | 2009-03-22 | 518.27 |
| 24 | 2455444 | 2010-09-04 | 517.55 |
| 25 | 2455968 | 2012-02-10 | 516.83 |
| 26 | 2456491 | 2013-07-17 | 517.09 |
| 27 | 2456983 | 2014-11-21 | 515.94 |
| 28 | 2457511 | 2016-05-02 | 515.33 |
| 29 | 2458023 | 2017-09-26 | 514.03 |
| 30 | 2458524 | 2019-02-09 | 513.3 |
| 31 | 2459060 | 2020-07-29 | 513.25 |
| 32 | 2459559 | 2021-12-10 | 515.09 |
| 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. |