| E | O (JD) | O (dat) | Period |
| -87 | 2411897 | 1891-06-13 | 344.36 |
| -85 | 2412601 | 1893-05-17 | 348.31 |
| -84 | 2412949 | 1894-04-30 | 346.65 |
| -83 | 2413285 | 1895-04-01 | 346.29 |
| -82 | 2413630 | 1896-03-11 | 347.58 |
| -81 | 2414000 | 1897-03-16 | 347.67 |
| -80 | 2414310 | 1898-01-20 | 350 |
| -77 | 2415380 | 1900-12-26 | 350.22 |
| -76 | 2415722 | 1901-12-03 | 348.28 |
| -75 | 2416086 | 1902-12-02 | 349.72 |
| -74 | 2416448 | 1903-11-29 | 350.81 |
| -73 | 2416771 | 1904-10-17 | 350.21 |
| -72 | 2417128 | 1905-10-09 | 349.43 |
| -71 | 2417477 | 1906-09-23 | 347.14 |
| -70 | 2417826 | 1907-09-07 | 349.14 |
| -69 | 2418179 | 1908-08-25 | 350.07 |
| -68 | 2418521 | 1909-08-02 | 348.57 |
| -67 | 2418873 | 1910-07-20 | 348.93 |
| -66 | 2419234 | 1911-07-16 | 348.64 |
| -65 | 2419566 | 1912-06-12 | 348.57 |
| -64 | 2419919 | 1913-05-31 | 348.43 |
| -63 | 2420269 | 1914-05-16 | 347.93 |
| -62 | 2420617 | 1915-04-29 | 349.14 |
| -61 | 2420963 | 1916-04-09 | 349.43 |
| -60 | 2421309 | 1917-03-21 | 349.07 |
| -59 | 2421669 | 1918-03-16 | 350.79 |
| -58 | 2422019 | 1919-03-01 | 352.29 |
| -57 | 2422358 | 1920-02-03 | 352.14 |
| -56 | 2422717 | 1921-01-27 | 352.71 |
| -55 | 2423080 | 1922-01-25 | 352.36 |
| -54 | 2423432 | 1923-01-12 | 353.21 |
| -53 | 2423770 | 1923-12-16 | 353.29 |
| -52 | 2424146 | 1924-12-26 | 351.29 |
| -51 | 2424475 | 1925-11-20 | 349.29 |
| -50 | 2424847 | 1926-11-27 | 352 |
| -49 | 2425174 | 1927-10-20 | 352.14 |
| -48 | 2425541 | 1928-10-21 | 348.36 |
| -47 | 2425861 | 1929-09-06 | 347.57 |
| -46 | 2426269 | 1930-10-19 | 346.79 |
| -45 | 2426577 | 1931-08-23 | 346.93 |
| -44 | 2426921 | 1932-08-01 | 348.21 |
| -43 | 2427267 | 1933-07-13 | 345.57 |
| -42 | 2427609 | 1934-06-20 | 344.5 |
| -41 | 2427963 | 1935-06-09 | 347.36 |
| -40 | 2428314 | 1936-05-25 | 346.93 |
| -39 | 2428654 | 1937-04-30 | 347.07 |
| -38 | 2429015 | 1938-04-26 | 346.43 |
| -37 | 2429346 | 1939-03-23 | 346.14 |
| -36 | 2429699 | 1940-03-10 | 345.86 |
| -35 | 2430036 | 1941-02-10 | 345.36 |
| -34 | 2430386 | 1942-01-26 | 346.57 |
| -33 | 2430737 | 1943-01-12 | 346.64 |
| -32 | 2431073 | 1943-12-14 | 346.79 |
| -31 | 2431431 | 1944-12-06 | 348 |
| -30 | 2431782 | 1945-11-22 | 348 |
| -29 | 2432116 | 1946-10-22 | 348.5 |
| -28 | 2432474 | 1947-10-15 | 347.57 |
| -27 | 2432820 | 1948-09-25 | 346.07 |
| -26 | 2433175 | 1949-09-15 | 346.5 |
| -25 | 2433514 | 1950-08-20 | 347.43 |
| -24 | 2433856 | 1951-07-28 | 348.29 |
| -23 | 2434202 | 1952-07-08 | 350.71 |
| -22 | 2434547 | 1953-06-18 | 351.57 |
| -21 | 2434907 | 1954-06-13 | 352.36 |
| -20 | 2435263 | 1955-06-04 | 354.21 |
| -19 | 2435642 | 1956-06-17 | 355 |
| -18 | 2435969 | 1957-05-10 | 354.57 |
| -17 | 2436334 | 1958-05-10 | 352.86 |
| -16 | 2436683 | 1959-04-24 | 349.79 |
| -15 | 2437036 | 1960-04-11 | 347.64 |
| -14 | 2437382 | 1961-03-23 | 346 |
| -13 | 2437728 | 1962-03-04 | 343.57 |
| -12 | 2438074 | 1963-02-13 | 343.07 |
| -11 | 2438404 | 1964-01-09 | 343.29 |
| -10 | 2438743 | 1964-12-13 | 344.5 |
| -9 | 2439084 | 1965-11-19 | 344.5 |
| -8 | 2439438 | 1966-11-08 | 345.93 |
| -7 | 2439786 | 1967-10-22 | 347.93 |
| -6 | 2440147 | 1968-10-17 | 349 |
| -5 | 2440478 | 1969-09-13 | 349.71 |
| -4 | 2440843 | 1970-09-13 | 346.71 |
| -3 | 2441175 | 1971-08-11 | 346.36 |
| -2 | 2441538 | 1972-08-08 | 347.71 |
| -1 | 2441880 | 1973-07-16 | 348.36 |
| 0 | 2442198 | 1974-05-30 | 350.57 |
| 1 | 2442584 | 1975-06-20 | 351.07 |
| 2 | 2442909 | 1976-05-10 | 350.71 |
| 3 | 2443289 | 1977-05-25 | 355 |
| 4 | 2443637 | 1978-05-08 | 355.64 |
| 5 | 2443991 | 1979-04-27 | 355.07 |
| 6 | 2444337 | 1980-04-07 | 356.43 |
| 7 | 2444711 | 1981-04-16 | 353.5 |
| 8 | 2445050 | 1982-03-21 | 352.57 |
| 9 | 2445414 | 1983-03-20 | 353.36 |
| 10 | 2445774 | 1984-03-14 | 351 |
| 11 | 2446101 | 1985-02-04 | 350.21 |
| 12 | 2446463 | 1986-02-01 | 351.43 |
| 13 | 2446812 | 1987-01-16 | 350.36 |
| 14 | 2447150 | 1987-12-20 | 350.57 |
| 15 | 2447514 | 1988-12-18 | 350 |
| 16 | 2447870 | 1989-12-09 | 348.71 |
| 17 | 2448223 | 1990-11-27 | 350.21 |
| 18 | 2448560 | 1991-10-30 | 350.21 |
| 19 | 2448904 | 1992-10-08 | 348.71 |
| 20 | 2449253 | 1993-09-22 | 347.93 |
| 21 | 2449612 | 1994-09-16 | 347.21 |
| 22 | 2449955 | 1995-08-25 | 350.14 |
| 23 | 2450311 | 1996-08-15 | 350.79 |
| 24 | 2450653 | 1997-07-23 | 347.93 |
| 25 | 2450991 | 1998-06-26 | 348 |
| 26 | 2451375 | 1999-07-15 | 348.14 |
| 27 | 2451693 | 2000-05-28 | 348 |
| 28 | 2452043 | 2001-05-13 | 349.07 |
| 29 | 2452396 | 2002-05-01 | 347 |
| 30 | 2452744 | 2003-04-14 | 346.71 |
| 31 | 2453092 | 2004-03-27 | 349.21 |
| 32 | 2453439 | 2005-03-09 | 347.5 |
| 33 | 2453785 | 2006-02-18 | 347.43 |
| 34 | 2454137 | 2007-02-05 | 349.64 |
| 35 | 2454488 | 2008-01-22 | 349.86 |
| 36 | 2454816 | 2008-12-15 | 350.43 |
| 37 | 2455188 | 2009-12-22 | 350.86 |
| 38 | 2455543 | 2010-12-12 | 351.43 |
| 39 | 2455886 | 2011-11-20 | 354.43 |
| 40 | 2456244 | 2012-11-12 | 354.57 |
| 41 | 2456590 | 2013-10-24 | 352.43 |
| 42 | 2456955 | 2014-10-24 | 353.07 |
| 43 | 2457311 | 2015-10-15 | 354 |
| 44 | 2457657 | 2016-09-25 | 352.71 |
| 45 | 2458008 | 2017-09-11 | 351.57 |
| 46 | 2458364 | 2018-09-02 | 349.36 |
| 47 | 2458722 | 2019-08-26 | 348.14 |
| 48 | 2459050 | 2020-07-19 | 350.31 |
| 49 | 2459417 | 2021-07-21 | 348.75 |
| 50 | 2459740 | 2022-06-09 | 347.3 |
| 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. |