| E | O (JD) | O (dat) | Period |
| -74 | 2412800 | 1893-12-02 | 438.57 |
| -69 | 2414970 | 1899-11-11 | 436.25 |
| -68 | 2415430 | 1901-02-14 | 435.47 |
| -67 | 2415860 | 1902-04-20 | 436.64 |
| -66 | 2416300 | 1903-07-04 | 436.72 |
| -65 | 2416720 | 1904-08-27 | 436 |
| -64 | 2417169 | 1905-11-19 | 437.07 |
| -63 | 2417600 | 1907-01-24 | 439.29 |
| -62 | 2418031 | 1908-03-30 | 441.14 |
| -61 | 2418473 | 1909-06-15 | 442.21 |
| -60 | 2418936 | 1910-09-21 | 441 |
| -59 | 2419374 | 1911-12-03 | 439.57 |
| -58 | 2419822 | 1913-02-23 | 440.64 |
| -57 | 2420258 | 1914-05-05 | 441.79 |
| -56 | 2420685 | 1915-07-06 | 441.21 |
| -55 | 2421100 | 1916-08-24 | 441.57 |
| -54 | 2421573 | 1917-12-10 | 441.29 |
| -53 | 2422021 | 1919-03-03 | 441.71 |
| -52 | 2422466 | 1920-05-21 | 444.43 |
| -51 | 2422912 | 1921-08-10 | 443.21 |
| -50 | 2423346 | 1922-10-18 | 439.07 |
| -49 | 2423781 | 1923-12-27 | 438.29 |
| -48 | 2424226 | 1925-03-16 | 437.71 |
| -47 | 2424652 | 1926-05-16 | 436.79 |
| -46 | 2425089 | 1927-07-27 | 436.93 |
| -45 | 2425534 | 1928-10-14 | 435.93 |
| -44 | 2425972 | 1929-12-26 | 434.86 |
| -43 | 2426401 | 1931-02-28 | 435.21 |
| -42 | 2426843 | 1932-05-15 | 434.5 |
| -41 | 2427267 | 1933-07-13 | 431.93 |
| -40 | 2427699 | 1934-09-18 | 430.07 |
| -39 | 2428135 | 1935-11-28 | 429.21 |
| -38 | 2428571 | 1937-02-06 | 428.36 |
| -37 | 2428982 | 1938-03-24 | 429.29 |
| -36 | 2429412 | 1939-05-28 | 429.14 |
| -35 | 2429841 | 1940-07-30 | 428.14 |
| -34 | 2430266 | 1941-09-28 | 429.36 |
| -33 | 2430710 | 1942-12-16 | 431.29 |
| -32 | 2431132 | 1944-02-11 | 432.64 |
| -31 | 2431568 | 1945-04-22 | 434.07 |
| -30 | 2431996 | 1946-06-24 | 434.14 |
| -29 | 2432436 | 1947-09-07 | 434.29 |
| -28 | 2432874 | 1948-11-18 | 434.86 |
| -27 | 2433310 | 1950-01-28 | 435.07 |
| -26 | 2433744 | 1951-04-07 | 435.29 |
| -25 | 2434178 | 1952-06-14 | 434.79 |
| -24 | 2434610 | 1953-08-20 | 433.64 |
| -23 | 2435045 | 1954-10-29 | 433.21 |
| -22 | 2435481 | 1956-01-08 | 434.71 |
| -21 | 2435916 | 1957-03-18 | 436.71 |
| -20 | 2436339 | 1958-05-15 | 438.07 |
| -19 | 2436780 | 1959-07-30 | 439.5 |
| -18 | 2437228 | 1960-10-20 | 441 |
| -17 | 2437674 | 1962-01-09 | 442.64 |
| -16 | 2438114 | 1963-03-25 | 444 |
| -15 | 2438565 | 1964-06-18 | 443.93 |
| -14 | 2439006 | 1965-09-02 | 442.79 |
| -13 | 2439446 | 1966-11-16 | 441.5 |
| -12 | 2439889 | 1968-02-02 | 441.93 |
| -11 | 2440334 | 1969-04-22 | 441.79 |
| -10 | 2440767 | 1970-06-29 | 440.29 |
| -9 | 2441202 | 1971-09-07 | 438.86 |
| -8 | 2441664 | 1972-12-12 | 436.79 |
| -7 | 2442092 | 1974-02-13 | 435.29 |
| -6 | 2442524 | 1975-04-21 | 435.43 |
| -5 | 2442955 | 1976-06-25 | 433.29 |
| -4 | 2443383 | 1977-08-27 | 431.57 |
| -3 | 2443812 | 1978-10-30 | 431.57 |
| -2 | 2444253 | 1980-01-14 | 431 |
| -1 | 2444679 | 1981-03-15 | 431.5 |
| 0 | 2445119 | 1982-05-29 | 431.57 |
| 1 | 2445539 | 1983-07-23 | 430.5 |
| 2 | 2445974 | 1984-09-30 | 429.71 |
| 3 | 2446405 | 1985-12-05 | 428.71 |
| 4 | 2446832 | 1987-02-05 | 428.57 |
| 5 | 2447260 | 1988-04-08 | 429.93 |
| 6 | 2447688 | 1989-06-10 | 430 |
| 7 | 2448112 | 1990-08-08 | 430.07 |
| 8 | 2448546 | 1991-10-16 | 431.07 |
| 9 | 2448986 | 1992-12-29 | 432.5 |
| 10 | 2449413 | 1994-03-01 | 434.36 |
| 11 | 2449845 | 1995-05-07 | 436.64 |
| 12 | 2450282 | 1996-07-17 | 437.14 |
| 13 | 2450721 | 1997-09-29 | 438 |
| 14 | 2451160 | 1998-12-12 | 439.36 |
| 15 | 2451611 | 2000-03-07 | 439.21 |
| 16 | 2452041 | 2001-05-11 | 439.71 |
| 17 | 2452490 | 2002-08-03 | 439.93 |
| 18 | 2452919 | 2003-10-06 | 439.57 |
| 19 | 2453357 | 2004-12-17 | 439.64 |
| 20 | 2453802 | 2006-03-07 | 439.36 |
| 21 | 2454238 | 2007-05-17 | 439.57 |
| 22 | 2454687 | 2008-08-08 | 440.21 |
| 23 | 2455120 | 2009-10-15 | 439.64 |
| 24 | 2455562 | 2010-12-31 | 438.93 |
| 25 | 2456001 | 2012-03-14 | 438.21 |
| 26 | 2456438 | 2013-05-25 | 437.86 |
| 27 | 2456876 | 2014-08-06 | 437.36 |
| 28 | 2457309 | 2015-10-13 | 435.57 |
| 29 | 2457751 | 2016-12-28 | 434.93 |
| 30 | 2458186 | 2018-03-08 | 434.43 |
| 31 | 2458619 | 2019-05-15 | 434.03 |
| 32 | 2459042 | 2020-07-11 | 433.89 |
| 33 | 2459486 | 2021-09-28 | 431.92 |
| 34 | 2459910 | 2022-11-26 | 431.3 |
| 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. |