| E | O (JD) | O (dat) | Period |
| -56 | 2413314 | 1895-04-30 | 434.77 |
| -55 | 2413764 | 1896-07-23 | 436.83 |
| -54 | 2414206 | 1897-10-08 | 437.73 |
| -53 | 2414661 | 1899-01-06 | 436.34 |
| -50 | 2415909 | 1902-06-08 | 435.98 |
| -48 | 2416817 | 1904-12-02 | 435.7 |
| -47 | 2417274 | 1906-03-04 | 435.19 |
| -46 | 2417712 | 1907-05-16 | 435.25 |
| -45 | 2418103 | 1908-06-10 | 434.96 |
| -44 | 2418552 | 1909-09-02 | 435.69 |
| -43 | 2418986 | 1910-11-10 | 433.34 |
| -42 | 2419432 | 1912-01-30 | 434.37 |
| -41 | 2419874 | 1913-04-16 | 437.93 |
| -40 | 2420292 | 1914-06-08 | 441.45 |
| -39 | 2420719 | 1915-08-09 | 439.11 |
| -38 | 2421162 | 1916-10-25 | 438.37 |
| -37 | 2421627 | 1918-02-02 | 438.22 |
| -36 | 2422096 | 1919-05-17 | 437.87 |
| -35 | 2422534 | 1920-07-28 | 438.22 |
| -33 | 2423346 | 1922-10-18 | 438.02 |
| -32 | 2423797 | 1924-01-12 | 435.76 |
| -31 | 2424249 | 1925-04-08 | 434.15 |
| -30 | 2424674 | 1926-06-07 | 434.04 |
| -29 | 2425122 | 1927-08-29 | 435.45 |
| -28 | 2425568 | 1928-11-17 | 437.55 |
| -27 | 2425970 | 1929-12-24 | 435.8 |
| -26 | 2426421 | 1931-03-20 | 434.65 |
| -25 | 2426867 | 1932-06-08 | 433.92 |
| -24 | 2427297 | 1933-08-12 | 432.95 |
| -23 | 2427733 | 1934-10-22 | 433.67 |
| -22 | 2428155 | 1935-12-18 | 434.26 |
| -21 | 2428589 | 1937-02-24 | 433.98 |
| -20 | 2429014 | 1938-04-25 | 435.02 |
| -19 | 2429452 | 1939-07-07 | 438.39 |
| -18 | 2429907 | 1940-10-04 | 440.99 |
| -17 | 2430326 | 1941-11-27 | 442.02 |
| -16 | 2430776 | 1943-02-20 | 442.85 |
| -15 | 2431225 | 1944-05-14 | 442.93 |
| -14 | 2431702 | 1945-09-03 | 442.05 |
| -13 | 2432136 | 1946-11-11 | 440.81 |
| -12 | 2432546 | 1947-12-26 | 441.11 |
| -11 | 2432998 | 1949-03-22 | 440.86 |
| -10 | 2433429 | 1950-05-27 | 440.11 |
| -9 | 2433866 | 1951-08-07 | 439.59 |
| -8 | 2434303 | 1952-10-17 | 440.74 |
| -7 | 2434761 | 1954-01-18 | 441.62 |
| -6 | 2435217 | 1955-04-19 | 440.49 |
| -5 | 2435644 | 1956-06-19 | 439.66 |
| -4 | 2436084 | 1957-09-02 | 437.31 |
| -3 | 2436520 | 1958-11-12 | 435.01 |
| -2 | 2436957 | 1960-01-23 | 431.9 |
| -1 | 2437385 | 1961-03-26 | 431.25 |
| 0 | 2437817 | 1962-06-01 | 430.8 |
| 1 | 2438230 | 1963-07-19 | 430.43 |
| 2 | 2438667 | 1964-09-28 | 429.29 |
| 3 | 2439085 | 1965-11-20 | 428.8 |
| 4 | 2439546 | 1967-02-24 | 429.56 |
| 5 | 2439960 | 1968-04-13 | 429.73 |
| 6 | 2440398 | 1969-06-25 | 429.59 |
| 7 | 2440804 | 1970-08-05 | 428.33 |
| 8 | 2441239 | 1971-10-14 | 428.58 |
| 9 | 2441686 | 1973-01-03 | 428.05 |
| 10 | 2442105 | 1974-02-26 | 429.39 |
| 11 | 2442524 | 1975-04-21 | 430.65 |
| 12 | 2442945 | 1976-06-15 | 431.71 |
| 13 | 2443397 | 1977-09-10 | 432.01 |
| 14 | 2443824 | 1978-11-11 | 432.17 |
| 15 | 2444260 | 1980-01-21 | 433.93 |
| 16 | 2444704 | 1981-04-09 | 435.95 |
| 17 | 2445123 | 1982-06-02 | 437.16 |
| 18 | 2445564 | 1983-08-17 | 437.95 |
| 19 | 2445991 | 1984-10-17 | 439.19 |
| 20 | 2446440 | 1986-01-09 | 440.08 |
| 21 | 2446894 | 1987-04-08 | 441.43 |
| 22 | 2447331 | 1988-06-18 | 442.69 |
| 23 | 2447778 | 1989-09-08 | 442.45 |
| 24 | 2448212 | 1990-11-16 | 442.44 |
| 25 | 2448655 | 1992-02-02 | 442.05 |
| 26 | 2449108 | 1993-04-30 | 441.7 |
| 27 | 2449543 | 1994-07-09 | 442.43 |
| 28 | 2449975 | 1995-09-14 | 442.91 |
| 29 | 2450421 | 1996-12-03 | 443.08 |
| 30 | 2450872 | 1998-02-27 | 442.55 |
| 31 | 2451310 | 1999-05-11 | 441.44 |
| 32 | 2451763 | 2000-08-06 | 440.05 |
| 33 | 2452207 | 2001-10-24 | 438.97 |
| 34 | 2452639 | 2002-12-30 | 437.75 |
| 35 | 2453075 | 2004-03-10 | 437.36 |
| 36 | 2453503 | 2005-05-12 | 437.57 |
| 37 | 2453923 | 2006-07-06 | 436.54 |
| 38 | 2454371 | 2007-09-27 | 436.88 |
| 39 | 2454815 | 2008-12-14 | 437.15 |
| 40 | 2455266 | 2010-03-10 | 437.67 |
| 41 | 2455707 | 2011-05-25 | 437.35 |
| 42 | 2456121 | 2012-07-12 | 435.87 |
| 43 | 2456570 | 2013-10-04 | 433.61 |
| 44 | 2456997 | 2014-12-05 | 431.55 |
| 45 | 2457442 | 2016-02-23 | 430.97 |
| 46 | 2457861 | 2017-04-17 | 431.35 |
| 47 | 2458279 | 2018-06-09 | 432.5 |
| 48 | 2458713 | 2019-08-17 | 431.98 |
| 49 | 2459138 | 2020-10-15 | 432.45 |
| 50 | 2459591 | 2022-01-11 | 432.79 |
| 51 | 2460026 | 2023-03-22 | 435.25 |
| 52 | 2460466 | 2024-06-04 | 437.91 |
| 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. |