| E | O (JD) | O (dat) | Period |
| -73 | 2412780 | 1893-11-12 | 421.25 |
| -72 | 2413240 | 1895-02-15 | 424.21 |
| -66 | 2415755 | 1902-01-05 | 426.21 |
| -65 | 2416200 | 1903-03-26 | 425.56 |
| -64 | 2416600 | 1904-04-29 | 423.88 |
| -62 | 2417478 | 1906-09-24 | 422 |
| -55 | 2420450 | 1914-11-13 | 421.77 |
| -53 | 2421290 | 1917-03-02 | 421.97 |
| -52 | 2421685 | 1918-04-01 | 420.97 |
| -51 | 2422080 | 1919-05-01 | 417.68 |
| -50 | 2422528 | 1920-07-22 | 412.73 |
| -49 | 2422931 | 1921-08-29 | 412.79 |
| -48 | 2423355 | 1922-10-27 | 416.57 |
| -47 | 2423762 | 1923-12-08 | 417.57 |
| -46 | 2424169 | 1925-01-18 | 415.86 |
| -45 | 2424585 | 1926-03-10 | 414.93 |
| -44 | 2425012 | 1927-05-11 | 414.07 |
| -43 | 2425442 | 1928-07-14 | 415.36 |
| -42 | 2425839 | 1929-08-15 | 417.07 |
| -41 | 2426256 | 1930-10-06 | 419.14 |
| -40 | 2426658 | 1931-11-12 | 420.43 |
| -39 | 2427088 | 1933-01-15 | 423.14 |
| -38 | 2427505 | 1934-03-08 | 426.07 |
| -37 | 2427960 | 1935-06-06 | 426.57 |
| -36 | 2428380 | 1936-07-30 | 426.79 |
| -35 | 2428825 | 1937-10-18 | 426.93 |
| -34 | 2429235 | 1938-12-02 | 425.36 |
| -33 | 2429651 | 1940-01-22 | 422.86 |
| -32 | 2430070 | 1941-03-16 | 419.64 |
| -31 | 2430500 | 1942-05-20 | 417.43 |
| -30 | 2430920 | 1943-07-14 | 417.07 |
| -29 | 2431340 | 1944-09-06 | 416.21 |
| -28 | 2431740 | 1945-10-11 | 414.07 |
| -27 | 2432164 | 1946-12-09 | 411.74 |
| -26 | 2432561 | 1948-01-10 | 411.88 |
| -25 | 2432987 | 1949-03-11 | 411.29 |
| -24 | 2433380 | 1950-04-08 | 410 |
| -18 | 2435863 | 1957-01-24 | 410.74 |
| -17 | 2436282 | 1958-03-19 | 411.37 |
| -16 | 2436669 | 1959-04-10 | 411.67 |
| -15 | 2437075 | 1960-05-20 | 412.28 |
| -11 | 2438740 | 1964-12-10 | 410.75 |
| -10 | 2439149 | 1966-01-23 | 410.65 |
| -9 | 2439568 | 1967-03-18 | 411.1 |
| -8 | 2439982 | 1968-05-05 | 407.35 |
| -7 | 2440378 | 1969-06-05 | 404.36 |
| -6 | 2440786 | 1970-07-18 | 403.5 |
| -5 | 2441180 | 1971-08-16 | 401.57 |
| -4 | 2441560 | 1972-08-30 | 402.86 |
| -3 | 2441990 | 1973-11-03 | 403.71 |
| -2 | 2442376 | 1974-11-24 | 405 |
| -1 | 2442796 | 1976-01-18 | 409 |
| 0 | 2443204 | 1977-03-01 | 409.43 |
| 1 | 2443612 | 1978-04-13 | 409 |
| 2 | 2444024 | 1979-05-30 | 410.14 |
| 3 | 2444442 | 1980-07-21 | 409 |
| 4 | 2444840 | 1981-08-23 | 409.93 |
| 5 | 2445252 | 1982-10-09 | 411.21 |
| 6 | 2445662 | 1983-11-23 | 411.43 |
| 7 | 2446064 | 1984-12-29 | 411.07 |
| 8 | 2446491 | 1986-03-01 | 410.71 |
| 9 | 2446902 | 1987-04-16 | 410.64 |
| 10 | 2447324 | 1988-06-11 | 410.43 |
| 11 | 2447713 | 1989-07-05 | 410.07 |
| 12 | 2448129 | 1990-08-25 | 407.21 |
| 13 | 2448534 | 1991-10-04 | 405.29 |
| 14 | 2448938 | 1992-11-11 | 406.21 |
| 15 | 2449358 | 1994-01-05 | 405.79 |
| 16 | 2449736 | 1995-01-18 | 404.36 |
| 17 | 2450164 | 1996-03-21 | 403.79 |
| 18 | 2450560 | 1997-04-21 | 403.87 |
| 19 | 2450963 | 1998-05-29 | 405.81 |
| 20 | 2451361 | 1999-07-01 | 407.19 |
| 21 | 2451764 | 2000-08-07 | 407.31 |
| 23 | 2452590 | 2002-11-11 | 408.5 |
| 24 | 2452997 | 2003-12-23 | 409.06 |
| 25 | 2453418 | 2005-02-16 | 410.25 |
| 26 | 2453823 | 2006-03-28 | 412.33 |
| 27 | 2454236 | 2007-05-15 | 411.57 |
| 28 | 2454633 | 2008-06-15 | 407.43 |
| 29 | 2455056 | 2009-08-12 | 405.21 |
| 30 | 2455483 | 2010-10-13 | 405.14 |
| 31 | 2455866 | 2011-10-31 | 404.57 |
| 32 | 2456253 | 2012-11-21 | 401.79 |
| 33 | 2456661 | 2014-01-03 | 397.29 |
| 34 | 2457070 | 2015-02-16 | 396.07 |
| 35 | 2457463 | 2016-03-15 | 397.07 |
| 36 | 2457851 | 2017-04-07 | 396.71 |
| 37 | 2458250 | 2018-05-11 | 395.71 |
| 38 | 2458644 | 2019-06-09 | 394.83 |
| 39 | 2459034 | 2020-07-03 | 395.09 |
| 40 | 2459434 | 2021-08-07 | 395.58 |
| 41 | 2459837 | 2022-09-14 | 394.9 |
| 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. |