| E | O (JD) | O (dat) | Period |
| -77 | 2414446 | 1898-06-05 | 318.55 |
| -76 | 2414780 | 1899-05-05 | 318.48 |
| -75 | 2415092 | 1900-03-13 | 317.59 |
| -74 | 2415408 | 1901-01-23 | 317.82 |
| -73 | 2415732 | 1901-12-13 | 317.75 |
| -69 | 2417000 | 1905-06-03 | 317.51 |
| -68 | 2417320 | 1906-04-19 | 317.12 |
| -62 | 2419215 | 1911-06-27 | 317.14 |
| -61 | 2419545 | 1912-05-22 | 316.94 |
| -57 | 2420810 | 1915-11-08 | 316.67 |
| -54 | 2421753 | 1918-06-08 | 316.47 |
| -53 | 2422065 | 1919-04-16 | 316.13 |
| -52 | 2422390 | 1920-03-06 | 315.61 |
| -51 | 2422698 | 1921-01-08 | 314.81 |
| -50 | 2423014 | 1921-11-20 | 313.74 |
| -49 | 2423330 | 1922-10-02 | 313.34 |
| -48 | 2423640 | 1923-08-08 | 313.01 |
| -47 | 2423954 | 1924-06-17 | 312.93 |
| -46 | 2424267 | 1925-04-26 | 313.45 |
| -45 | 2424567 | 1926-02-20 | 313.95 |
| -44 | 2424891 | 1927-01-10 | 314.55 |
| -43 | 2425203 | 1927-11-18 | 315.16 |
| -42 | 2425524 | 1928-10-04 | 315.39 |
| -41 | 2425839 | 1929-08-15 | 315.9 |
| -40 | 2426159 | 1930-07-01 | 316.3 |
| -39 | 2426474 | 1931-05-12 | 315.68 |
| -38 | 2426787 | 1932-03-20 | 316.07 |
| -37 | 2427098 | 1933-01-25 | 316.18 |
| -36 | 2427419 | 1933-12-12 | 317.05 |
| -35 | 2427734 | 1934-10-23 | 317.61 |
| -34 | 2428045 | 1935-08-30 | 318.49 |
| -33 | 2428374 | 1936-07-24 | 319.5 |
| -32 | 2428690 | 1937-06-05 | 320.31 |
| -31 | 2429019 | 1938-04-30 | 320.83 |
| -30 | 2429333 | 1939-03-10 | 321.85 |
| -29 | 2429655 | 1940-01-26 | 322.88 |
| -28 | 2429979 | 1940-12-15 | 323.7 |
| -27 | 2430300 | 1941-11-01 | 324.74 |
| -26 | 2430623 | 1942-09-20 | 324.96 |
| -25 | 2430954 | 1943-08-17 | 325.27 |
| -24 | 2431283 | 1944-07-11 | 325.06 |
| -23 | 2431615 | 1945-06-08 | 324.42 |
| -22 | 2431939 | 1946-04-28 | 323.99 |
| -21 | 2432255 | 1947-03-10 | 322.9 |
| -20 | 2432575 | 1948-01-24 | 322.1 |
| -19 | 2432898 | 1948-12-12 | 321.69 |
| -18 | 2433215 | 1949-10-25 | 321.72 |
| -17 | 2433543 | 1950-09-18 | 322.15 |
| -16 | 2433856 | 1951-07-28 | 322.55 |
| -15 | 2434186 | 1952-06-22 | 322.8 |
| -14 | 2434510 | 1953-05-12 | 322.82 |
| -13 | 2434836 | 1954-04-03 | 322.76 |
| -12 | 2435157 | 1955-02-18 | 322.34 |
| -11 | 2435476 | 1956-01-03 | 322.02 |
| -10 | 2435801 | 1956-11-23 | 321.26 |
| -9 | 2436121 | 1957-10-09 | 320.6 |
| -8 | 2436441 | 1958-08-25 | 319.79 |
| -7 | 2436761 | 1959-07-11 | 319.58 |
| -6 | 2437079 | 1960-05-24 | 318.93 |
| -5 | 2437401 | 1961-04-11 | 318.55 |
| -4 | 2437716 | 1962-02-20 | 318.33 |
| -3 | 2438030 | 1962-12-31 | 317.96 |
| -2 | 2438356 | 1963-11-22 | 318.34 |
| -1 | 2438665 | 1964-09-26 | 318.43 |
| 0 | 2438990 | 1965-08-17 | 318.52 |
| 1 | 2439306 | 1966-06-29 | 318.77 |
| 2 | 2439620 | 1967-05-09 | 318.71 |
| 3 | 2439952 | 1968-04-05 | 318.86 |
| 4 | 2440264 | 1969-02-11 | 319.04 |
| 5 | 2440583 | 1969-12-27 | 318.52 |
| 6 | 2440901 | 1970-11-10 | 318 |
| 7 | 2441216 | 1971-09-21 | 317.39 |
| 8 | 2441544 | 1972-08-14 | 316.57 |
| 9 | 2441856 | 1973-06-22 | 316.05 |
| 10 | 2442170 | 1974-05-02 | 315.72 |
| 11 | 2442481 | 1975-03-09 | 315.55 |
| 12 | 2442798 | 1976-01-20 | 315.31 |
| 13 | 2443115 | 1976-12-02 | 315.39 |
| 14 | 2443422 | 1977-10-05 | 316.01 |
| 15 | 2443746 | 1978-08-25 | 316.5 |
| 16 | 2444063 | 1979-07-08 | 317.15 |
| 17 | 2444376 | 1980-05-16 | 317.78 |
| 18 | 2444700 | 1981-04-05 | 318.37 |
| 19 | 2445015 | 1982-02-14 | 318.87 |
| 20 | 2445332 | 1982-12-28 | 319.37 |
| 21 | 2445654 | 1983-11-15 | 319.81 |
| 22 | 2445977 | 1984-10-03 | 319.8 |
| 23 | 2446295 | 1985-08-17 | 319.45 |
| 24 | 2446612 | 1986-06-30 | 319.03 |
| 25 | 2446943 | 1987-05-27 | 318.35 |
| 26 | 2447257 | 1988-04-05 | 317.73 |
| 27 | 2447569 | 1989-02-11 | 316.95 |
| 28 | 2447887 | 1989-12-26 | 316.14 |
| 29 | 2448199 | 1990-11-03 | 315.48 |
| 30 | 2448515 | 1991-09-15 | 315.16 |
| 31 | 2448836 | 1992-08-01 | 315.48 |
| 32 | 2449147 | 1993-06-08 | 315.53 |
| 33 | 2449457 | 1994-04-14 | 315.72 |
| 34 | 2449775 | 1995-02-26 | 315.93 |
| 35 | 2450098 | 1996-01-15 | 316.09 |
| 36 | 2450412 | 1996-11-24 | 316.5 |
| 37 | 2450723 | 1997-10-01 | 316.83 |
| 38 | 2451045 | 1998-08-19 | 317.08 |
| 39 | 2451359 | 1999-06-29 | 316.63 |
| 40 | 2451678 | 2000-05-13 | 316.91 |
| 41 | 2452000 | 2001-03-31 | 317.85 |
| 42 | 2452310 | 2002-02-04 | 318.08 |
| 43 | 2452630 | 2002-12-21 | 318.08 |
| 44 | 2452939 | 2003-10-26 | 318.15 |
| 45 | 2453270 | 2004-09-21 | 318.63 |
| 46 | 2453596 | 2005-08-13 | 319.28 |
| 47 | 2453903 | 2006-06-16 | 319.6 |
| 48 | 2454223 | 2007-05-02 | 319.45 |
| 49 | 2454538 | 2008-03-12 | 319.41 |
| 50 | 2454869 | 2009-02-06 | 318.86 |
| 51 | 2455192 | 2009-12-26 | 319.33 |
| 52 | 2455501 | 2010-10-31 | 320.18 |
| 53 | 2455819 | 2011-09-14 | 320.3 |
| 54 | 2456139 | 2012-07-30 | 320.7 |
| 55 | 2456459 | 2013-06-15 | 320.59 |
| 56 | 2456788 | 2014-05-10 | 320.78 |
| 57 | 2457109 | 2015-03-27 | 320.7 |
| 58 | 2457427 | 2016-02-08 | 319.93 |
| 59 | 2457754 | 2016-12-31 | 319.08 |
| 60 | 2458071 | 2017-11-13 | 317.58 |
| 61 | 2458387 | 2018-09-25 | 316.65 |
| 62 | 2458697 | 2019-08-01 | 315.97 |
| 63 | 2459012 | 2020-06-11 | 315.17 |
| 64 | 2459331 | 2021-04-26 | 313.86 |
| 65 | 2459635 | 2022-02-24 | 313.34 |
| 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. |