| E | O (JD) | O (dat) | Period |
| -75 | 2411231 | 1889-08-16 | 400.18 |
| -71 | 2412809 | 1893-12-11 | 399.35 |
| -70 | 2413229 | 1895-02-04 | 399.68 |
| -69 | 2413607 | 1896-02-17 | 400.13 |
| -68 | 2414024 | 1897-04-09 | 399.35 |
| -66 | 2414835 | 1899-06-29 | 399.07 |
| -65 | 2415210 | 1900-07-09 | 398.9 |
| -64 | 2415624 | 1901-08-27 | 397.29 |
| -63 | 2416030 | 1902-10-07 | 396.81 |
| -62 | 2416401 | 1903-10-13 | 396.25 |
| -61 | 2416807 | 1904-11-22 | 396.66 |
| -60 | 2417200 | 1905-12-20 | 398.12 |
| -58 | 2417984 | 1908-02-12 | 398.28 |
| -57 | 2418383 | 1909-03-17 | 399.42 |
| -55 | 2419194 | 1911-06-06 | 401 |
| -54 | 2419599 | 1912-07-15 | 401.69 |
| -53 | 2420010 | 1913-08-30 | 403.31 |
| -52 | 2420400 | 1914-09-24 | 405.11 |
| -51 | 2420812 | 1915-11-10 | 405.24 |
| -50 | 2421214 | 1916-12-16 | 405.96 |
| -49 | 2421618 | 1918-01-24 | 406.44 |
| -48 | 2422035 | 1919-03-17 | 406.34 |
| -47 | 2422444 | 1920-04-29 | 406.4 |
| -46 | 2422836 | 1921-05-26 | 405.34 |
| -45 | 2423260 | 1922-07-24 | 404.46 |
| -44 | 2423662 | 1923-08-30 | 403.7 |
| -43 | 2424057 | 1924-09-28 | 402.68 |
| -42 | 2424459 | 1925-11-04 | 401.97 |
| -41 | 2424856 | 1926-12-06 | 401.46 |
| -40 | 2425257 | 1928-01-11 | 400.32 |
| -39 | 2425666 | 1929-02-23 | 400.4 |
| -38 | 2426066 | 1930-03-30 | 400.88 |
| -37 | 2426462 | 1931-04-30 | 401.02 |
| -36 | 2426861 | 1932-06-02 | 401.46 |
| -35 | 2427260 | 1933-07-06 | 402.08 |
| -34 | 2427663 | 1934-08-13 | 402.69 |
| -33 | 2428070 | 1935-09-24 | 403.92 |
| -32 | 2428470 | 1936-10-28 | 405.04 |
| -31 | 2428877 | 1937-12-09 | 405.92 |
| -30 | 2429288 | 1939-01-24 | 406.62 |
| -29 | 2429693 | 1940-03-04 | 407.15 |
| -28 | 2430103 | 1941-04-18 | 406.94 |
| -27 | 2430508 | 1942-05-28 | 406.51 |
| -26 | 2430916 | 1943-07-10 | 405.45 |
| -25 | 2431324 | 1944-08-21 | 404.17 |
| -24 | 2431734 | 1945-10-05 | 403.78 |
| -23 | 2432129 | 1946-11-04 | 403.36 |
| -22 | 2432529 | 1947-12-09 | 403.29 |
| -21 | 2432927 | 1949-01-10 | 404.01 |
| -20 | 2433325 | 1950-02-12 | 404.67 |
| -19 | 2433741 | 1951-04-04 | 405.11 |
| -18 | 2434145 | 1952-05-12 | 406.39 |
| -17 | 2434551 | 1953-06-22 | 407.1 |
| -16 | 2434972 | 1954-08-17 | 407.52 |
| -15 | 2435374 | 1955-09-23 | 408.03 |
| -14 | 2435771 | 1956-10-24 | 408.26 |
| -13 | 2436187 | 1957-12-14 | 408.93 |
| -12 | 2436591 | 1959-01-22 | 409.41 |
| -11 | 2436997 | 1960-03-03 | 409.62 |
| -10 | 2437415 | 1961-04-25 | 410.13 |
| -9 | 2437829 | 1962-06-13 | 410.79 |
| -8 | 2438240 | 1963-07-29 | 410 |
| -7 | 2438651 | 1964-09-12 | 409.87 |
| -6 | 2439059 | 1965-10-25 | 408.94 |
| -5 | 2439462 | 1966-12-02 | 407.85 |
| -4 | 2439881 | 1968-01-25 | 406.62 |
| -3 | 2440274 | 1969-02-21 | 406.04 |
| -2 | 2440690 | 1970-04-13 | 405.05 |
| -1 | 2441088 | 1971-05-16 | 403.99 |
| 0 | 2441497 | 1972-06-28 | 402.97 |
| 1 | 2441892 | 1973-07-28 | 401.88 |
| 2 | 2442305 | 1974-09-14 | 400.96 |
| 3 | 2442698 | 1975-10-12 | 398.95 |
| 4 | 2443095 | 1976-11-12 | 398.2 |
| 5 | 2443495 | 1977-12-17 | 397.23 |
| 6 | 2443897 | 1979-01-23 | 396.47 |
| 7 | 2444285 | 1980-02-15 | 396.2 |
| 8 | 2444670 | 1981-03-06 | 396.8 |
| 9 | 2445078 | 1982-04-18 | 397.66 |
| 10 | 2445473 | 1983-05-18 | 398.78 |
| 11 | 2445864 | 1984-06-12 | 400.55 |
| 12 | 2446274 | 1985-07-27 | 403.15 |
| 13 | 2446674 | 1986-08-31 | 405.41 |
| 14 | 2447082 | 1987-10-13 | 406.9 |
| 15 | 2447488 | 1988-11-22 | 408.29 |
| 16 | 2447901 | 1990-01-09 | 409.52 |
| 17 | 2448318 | 1991-03-02 | 409.64 |
| 18 | 2448729 | 1992-04-16 | 409.57 |
| 19 | 2449139 | 1993-05-31 | 409.07 |
| 20 | 2449541 | 1994-07-07 | 408.73 |
| 21 | 2449956 | 1995-08-26 | 407.7 |
| 22 | 2450359 | 1996-10-02 | 406.85 |
| 23 | 2450762 | 1997-11-09 | 406.1 |
| 24 | 2451170 | 1998-12-22 | 405.68 |
| 25 | 2451583 | 2000-02-08 | 405.8 |
| 26 | 2451981 | 2001-03-12 | 405.54 |
| 27 | 2452388 | 2002-04-23 | 405.82 |
| 28 | 2452787 | 2003-05-27 | 405.92 |
| 29 | 2453195 | 2004-07-08 | 405.86 |
| 30 | 2453608 | 2005-08-25 | 406.4 |
| 31 | 2454011 | 2006-10-02 | 406.99 |
| 32 | 2454419 | 2007-11-14 | 407.34 |
| 33 | 2454824 | 2008-12-23 | 406.77 |
| 34 | 2455230 | 2010-02-02 | 405.86 |
| 35 | 2455647 | 2011-03-26 | 404.91 |
| 36 | 2456048 | 2012-04-30 | 404.28 |
| 37 | 2456458 | 2013-06-14 | 403.25 |
| 38 | 2456845 | 2014-07-06 | 402.15 |
| 39 | 2457250 | 2015-08-15 | 401.46 |
| 40 | 2457652 | 2016-09-20 | 401.11 |
| 41 | 2458055 | 2017-10-28 | 401.1 |
| 42 | 2458452 | 2018-11-29 | 401.08 |
| 43 | 2458849 | 2019-12-31 | 402 |
| 44 | 2459258 | 2021-02-12 | 401.82 |
| 45 | 2459665 | 2022-03-26 | 402.03 |
| 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. |