| E | O (JD) | O (dat) | Period |
| -54 | 2414932 | 1899-10-04 | 530.07 |
| -53 | 2415500 | 1901-04-25 | 536.92 |
| -51 | 2416570 | 1904-03-30 | 537.99 |
| -50 | 2417085 | 1905-08-27 | 533.72 |
| -49 | 2417612 | 1907-02-05 | 533.11 |
| -48 | 2418190 | 1908-09-05 | 530.8 |
| -47 | 2418686 | 1910-01-14 | 532.08 |
| -46 | 2419210 | 1911-06-22 | 535.65 |
| -45 | 2419752 | 1912-12-15 | 534.15 |
| -44 | 2420280 | 1914-05-27 | 532.43 |
| -43 | 2420824 | 1915-11-22 | 535.72 |
| -42 | 2421372 | 1917-05-23 | 537.22 |
| -41 | 2421908 | 1918-11-10 | 536.71 |
| -40 | 2422422 | 1920-04-07 | 535.85 |
| -39 | 2422974 | 1921-10-11 | 533.99 |
| -38 | 2423509 | 1923-03-30 | 532 |
| -37 | 2424037 | 1924-09-08 | 532.5 |
| -36 | 2424569 | 1926-02-22 | 530.72 |
| -35 | 2425103 | 1927-08-10 | 527.86 |
| -34 | 2425625 | 1929-01-13 | 529.15 |
| -33 | 2426160 | 1930-07-02 | 529.72 |
| -32 | 2426666 | 1931-11-20 | 530.65 |
| -31 | 2427207 | 1933-05-14 | 532.71 |
| -30 | 2427747 | 1934-11-05 | 532.2 |
| -29 | 2428275 | 1936-04-16 | 533.28 |
| -28 | 2428826 | 1937-10-19 | 535.5 |
| -27 | 2429360 | 1939-04-06 | 535.29 |
| -26 | 2429876 | 1940-09-03 | 535.08 |
| -25 | 2430416 | 1942-02-25 | 534.65 |
| -24 | 2430954 | 1943-08-17 | 535.15 |
| -23 | 2431494 | 1945-02-07 | 537.08 |
| -22 | 2432019 | 1946-07-17 | 537.86 |
| -21 | 2432567 | 1948-01-16 | 537.21 |
| -20 | 2433111 | 1949-07-13 | 536.99 |
| -19 | 2433644 | 1950-12-28 | 538.93 |
| -18 | 2434178 | 1952-06-14 | 540 |
| -17 | 2434713 | 1953-12-01 | 539.22 |
| -16 | 2435253 | 1955-05-25 | 539.08 |
| -15 | 2435805 | 1956-11-27 | 540 |
| -14 | 2436341 | 1958-05-17 | 541.72 |
| -13 | 2436886 | 1959-11-13 | 542.58 |
| -12 | 2437416 | 1961-04-26 | 541.28 |
| -11 | 2437966 | 1962-10-28 | 539.28 |
| -10 | 2438509 | 1964-04-23 | 538.28 |
| -9 | 2439053 | 1965-10-19 | 537.5 |
| -8 | 2439583 | 1967-04-02 | 537.43 |
| -7 | 2440113 | 1968-09-13 | 535.72 |
| -6 | 2440650 | 1970-03-04 | 534.08 |
| -5 | 2441177 | 1971-08-13 | 533.58 |
| -4 | 2441729 | 1973-02-15 | 533 |
| -3 | 2442246 | 1974-07-17 | 534 |
| -2 | 2442793 | 1976-01-15 | 534.35 |
| -1 | 2443313 | 1977-06-18 | 533.13 |
| 0 | 2443845 | 1978-12-02 | 533.7 |
| 1 | 2444394 | 1980-06-03 | 535.92 |
| 2 | 2444914 | 1981-11-05 | 537.57 |
| 3 | 2445456 | 1983-05-01 | 538.86 |
| 4 | 2445991 | 1984-10-17 | 538.93 |
| 5 | 2446551 | 1986-04-30 | 540.58 |
| 6 | 2447081 | 1987-10-12 | 542.08 |
| 7 | 2447621 | 1989-04-04 | 541.86 |
| 8 | 2448163 | 1990-09-28 | 541.29 |
| 9 | 2448713 | 1992-03-31 | 540.78 |
| 10 | 2449246 | 1993-09-15 | 541.06 |
| 11 | 2449787 | 1995-03-10 | 541.2 |
| 12 | 2450333 | 1996-09-06 | 540.28 |
| 13 | 2450870 | 1998-02-25 | 539.29 |
| 14 | 2451407 | 1999-08-16 | 538.93 |
| 15 | 2451954 | 2001-02-13 | 538.65 |
| 16 | 2452486 | 2002-07-30 | 539.08 |
| 17 | 2453023 | 2004-01-18 | 538.79 |
| 18 | 2453555 | 2005-07-03 | 537.5 |
| 19 | 2454106 | 2007-01-05 | 535.78 |
| 20 | 2454644 | 2008-06-26 | 535.28 |
| 21 | 2455176 | 2009-12-10 | 534.5 |
| 22 | 2455710 | 2011-05-28 | 532.36 |
| 23 | 2456231 | 2012-10-30 | 530.15 |
| 24 | 2456772 | 2014-04-24 | 529.5 |
| 25 | 2457289 | 2015-09-23 | 529.22 |
| 26 | 2457825 | 2017-03-12 | 528.79 |
| 27 | 2458347 | 2018-08-16 | 528.31 |
| 28 | 2458886 | 2020-02-06 | 528.55 |
| 29 | 2459409 | 2021-07-13 | 529.07 |
| 30 | 2459935 | 2022-12-21 | 527.69 |
| 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. |