| E | O (JD) | O (dat) | Period |
| -91 | 2413489 | 1895-10-22 | 342 |
| -90 | 2413824 | 1896-09-21 | 343.2 |
| -89 | 2414162 | 1897-08-25 | 342.67 |
| -88 | 2414521 | 1898-08-19 | 341.16 |
| -87 | 2414854 | 1899-07-18 | 341.41 |
| -82 | 2416576 | 1904-04-05 | 342.09 |
| -81 | 2416904 | 1905-02-27 | 342 |
| -80 | 2417240 | 1906-01-29 | 341.91 |
| -79 | 2417584 | 1907-01-08 | 341.11 |
| -78 | 2417928 | 1907-12-18 | 340.64 |
| -77 | 2418279 | 1908-12-03 | 343.57 |
| -76 | 2418618 | 1909-11-07 | 345.14 |
| -75 | 2418952 | 1910-10-07 | 343.86 |
| -74 | 2419297 | 1911-09-17 | 343.5 |
| -73 | 2419657 | 1912-09-11 | 342.71 |
| -72 | 2419999 | 1913-08-19 | 343.36 |
| -71 | 2420327 | 1914-07-13 | 344.36 |
| -70 | 2420689 | 1915-07-10 | 343.43 |
| -69 | 2421006 | 1916-05-22 | 342.93 |
| -68 | 2421371 | 1917-05-22 | 343.57 |
| -67 | 2421699 | 1918-04-15 | 343.93 |
| -66 | 2422063 | 1919-04-14 | 344.43 |
| -65 | 2422394 | 1920-03-10 | 344.36 |
| -64 | 2422742 | 1921-02-21 | 344.14 |
| -63 | 2423089 | 1922-02-03 | 343.64 |
| -62 | 2423428 | 1923-01-08 | 342.5 |
| -61 | 2423770 | 1923-12-16 | 343.14 |
| -60 | 2424118 | 1924-11-28 | 342.21 |
| -59 | 2424455 | 1925-10-31 | 342.71 |
| -58 | 2424797 | 1926-10-08 | 343.57 |
| -57 | 2425143 | 1927-09-19 | 343 |
| -56 | 2425479 | 1928-08-20 | 342.93 |
| -55 | 2425836 | 1929-08-12 | 341.43 |
| -54 | 2426172 | 1930-07-14 | 340.07 |
| -53 | 2426518 | 1931-06-25 | 340.21 |
| -52 | 2426856 | 1932-05-28 | 339.21 |
| -51 | 2427176 | 1933-04-13 | 338.64 |
| -50 | 2427525 | 1934-03-28 | 338.36 |
| -49 | 2427860 | 1935-02-26 | 338.93 |
| -48 | 2428204 | 1936-02-05 | 341.86 |
| -47 | 2428545 | 1937-01-11 | 343.21 |
| -46 | 2428882 | 1937-12-14 | 343.57 |
| -45 | 2429237 | 1938-12-04 | 344.07 |
| -44 | 2429581 | 1939-11-13 | 344.93 |
| -43 | 2429925 | 1940-10-22 | 346.5 |
| -42 | 2430270 | 1941-10-02 | 345.93 |
| -41 | 2430611 | 1942-09-08 | 345.43 |
| -40 | 2430967 | 1943-08-30 | 347.57 |
| -39 | 2431311 | 1944-08-08 | 349.21 |
| -38 | 2431651 | 1945-07-14 | 350.64 |
| -37 | 2432003 | 1946-07-01 | 351 |
| -36 | 2432369 | 1947-07-02 | 350.86 |
| -35 | 2432715 | 1948-06-12 | 352.5 |
| -34 | 2433075 | 1949-06-07 | 352.29 |
| -33 | 2433417 | 1950-05-15 | 350.14 |
| -32 | 2433773 | 1951-05-06 | 350 |
| -31 | 2434124 | 1952-04-21 | 350.21 |
| -30 | 2434462 | 1953-03-25 | 350.21 |
| -29 | 2434812 | 1954-03-10 | 350.79 |
| -28 | 2435172 | 1955-03-05 | 350.29 |
| -27 | 2435521 | 1956-02-17 | 350.36 |
| -26 | 2435874 | 1957-02-04 | 350.5 |
| -25 | 2436227 | 1958-01-23 | 349.07 |
| -24 | 2436574 | 1959-01-05 | 347.71 |
| -23 | 2436917 | 1959-12-14 | 346.86 |
| -22 | 2437264 | 1960-11-25 | 345.36 |
| -21 | 2437607 | 1961-11-03 | 344.93 |
| -20 | 2437954 | 1962-10-16 | 345 |
| -19 | 2438297 | 1963-09-24 | 345.14 |
| -18 | 2438639 | 1964-08-31 | 345.21 |
| -17 | 2438991 | 1965-08-18 | 345.5 |
| -16 | 2439330 | 1966-07-23 | 346 |
| -15 | 2439683 | 1967-07-11 | 346.64 |
| -14 | 2440021 | 1968-06-13 | 346.57 |
| -13 | 2440377 | 1969-06-04 | 346.21 |
| -12 | 2440718 | 1970-05-11 | 346.57 |
| -11 | 2441071 | 1971-04-29 | 346.93 |
| -10 | 2441411 | 1972-04-03 | 346.79 |
| -9 | 2441757 | 1973-03-15 | 346.71 |
| -8 | 2442108 | 1974-03-01 | 346.57 |
| -7 | 2442453 | 1975-02-09 | 347 |
| -6 | 2442800 | 1976-01-22 | 348.29 |
| -5 | 2443149 | 1977-01-05 | 347.64 |
| -4 | 2443492 | 1977-12-14 | 346.21 |
| -3 | 2443848 | 1978-12-05 | 346.07 |
| -2 | 2444196 | 1979-11-18 | 346.86 |
| -1 | 2444536 | 1980-10-23 | 347.64 |
| 0 | 2444872 | 1981-09-24 | 346.64 |
| 1 | 2445226 | 1982-09-13 | 345.36 |
| 2 | 2445579 | 1983-09-01 | 346 |
| 3 | 2445929 | 1984-08-16 | 347 |
| 4 | 2446264 | 1985-07-17 | 346.64 |
| 5 | 2446615 | 1986-07-03 | 345.21 |
| 6 | 2446961 | 1987-06-14 | 344.21 |
| 7 | 2447305 | 1988-05-23 | 344.79 |
| 8 | 2447646 | 1989-04-29 | 345.14 |
| 9 | 2447992 | 1990-04-10 | 344 |
| 10 | 2448335 | 1991-03-19 | 343.07 |
| 11 | 2448685 | 1992-03-03 | 342.64 |
| 12 | 2449026 | 1993-02-07 | 341.5 |
| 13 | 2449366 | 1994-01-13 | 339.86 |
| 14 | 2449703 | 1994-12-16 | 338.57 |
| 15 | 2450045 | 1995-11-23 | 337.71 |
| 16 | 2450374 | 1996-10-17 | 337.86 |
| 17 | 2450711 | 1997-09-19 | 338.36 |
| 18 | 2451049 | 1998-08-23 | 338.5 |
| 19 | 2451390 | 1999-07-30 | 339.64 |
| 20 | 2451732 | 2000-07-06 | 341.21 |
| 21 | 2452074 | 2001-06-13 | 342.5 |
| 22 | 2452413 | 2002-05-18 | 343.21 |
| 23 | 2452761 | 2003-05-01 | 343.29 |
| 24 | 2453101 | 2004-04-05 | 344.43 |
| 25 | 2453454 | 2005-03-24 | 344.71 |
| 26 | 2453790 | 2006-02-23 | 343.93 |
| 27 | 2454138 | 2007-02-06 | 344.43 |
| 28 | 2454490 | 2008-01-24 | 345 |
| 29 | 2454823 | 2008-12-22 | 345.43 |
| 30 | 2455166 | 2009-11-30 | 346.14 |
| 31 | 2455518 | 2010-11-17 | 346.36 |
| 32 | 2455867 | 2011-11-01 | 347.57 |
| 33 | 2456213 | 2012-10-12 | 349.36 |
| 34 | 2456561 | 2013-09-25 | 351 |
| 35 | 2456916 | 2014-09-15 | 350.86 |
| 36 | 2457263 | 2015-08-28 | 349.86 |
| 37 | 2457617 | 2016-08-16 | 351.57 |
| 38 | 2457981 | 2017-08-15 | 351.21 |
| 39 | 2458316 | 2018-07-16 | 349.71 |
| 40 | 2458662 | 2019-06-27 | 350.44 |
| 41 | 2459034 | 2020-07-03 | 348.11 |
| 42 | 2459360 | 2021-05-25 | 348.08 |
| 43 | 2459715 | 2022-05-15 | 350.7 |
| 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. |