| E | O (JD) | O (dat) | Period |
| -74 | 2413933 | 1897-01-08 | 414.1 |
| -73 | 2414360 | 1898-03-11 | 413.41 |
| -72 | 2414751 | 1899-04-06 | 410.62 |
| -71 | 2415175 | 1900-06-04 | 408.56 |
| -70 | 2415590 | 1901-07-24 | 408.58 |
| -69 | 2416000 | 1902-09-07 | 409.36 |
| -68 | 2416398 | 1903-10-10 | 411.99 |
| -67 | 2416793 | 1904-11-08 | 412.07 |
| -66 | 2417220 | 1906-01-09 | 411.43 |
| -65 | 2417622 | 1907-02-15 | 412.58 |
| -64 | 2418072 | 1908-05-10 | 413.93 |
| -63 | 2418462 | 1909-06-04 | 415.14 |
| -62 | 2418888 | 1910-08-04 | 417.57 |
| -61 | 2419286 | 1911-09-06 | 419.07 |
| -60 | 2419700 | 1912-10-24 | 420.15 |
| -59 | 2420125 | 1913-12-23 | 420.22 |
| -58 | 2420563 | 1915-03-06 | 420.21 |
| -57 | 2420998 | 1916-05-14 | 422.92 |
| -56 | 2421418 | 1917-07-08 | 423.86 |
| -55 | 2421815 | 1918-08-09 | 422.51 |
| -54 | 2422242 | 1919-10-10 | 420.07 |
| -53 | 2422665 | 1920-12-06 | 419.35 |
| -52 | 2423094 | 1922-02-08 | 420.71 |
| -51 | 2423509 | 1923-03-30 | 421.5 |
| -50 | 2423933 | 1924-05-27 | 418.79 |
| -49 | 2424354 | 1925-07-22 | 415 |
| -48 | 2424769 | 1926-09-10 | 413.71 |
| -47 | 2425189 | 1927-11-04 | 411.92 |
| -46 | 2425581 | 1928-11-30 | 409.5 |
| -45 | 2425988 | 1930-01-11 | 407.79 |
| -44 | 2426407 | 1931-03-06 | 406.14 |
| -43 | 2426802 | 1932-04-04 | 407.57 |
| -42 | 2427218 | 1933-05-25 | 409.57 |
| -41 | 2427614 | 1934-06-25 | 408.72 |
| -40 | 2428030 | 1935-08-15 | 408.51 |
| -39 | 2428446 | 1936-10-04 | 409.72 |
| -38 | 2428857 | 1937-11-19 | 410.49 |
| -37 | 2429260 | 1938-12-27 | 410.35 |
| -36 | 2429668 | 1940-02-08 | 409.43 |
| -35 | 2430088 | 1941-04-03 | 409.37 |
| -34 | 2430491 | 1942-05-11 | 410.72 |
| -33 | 2430898 | 1943-06-22 | 412.21 |
| -32 | 2431310 | 1944-08-07 | 411.71 |
| -31 | 2431724 | 1945-09-25 | 411.72 |
| -30 | 2432143 | 1946-11-18 | 413.29 |
| -29 | 2432556 | 1948-01-05 | 414.36 |
| -28 | 2432964 | 1949-02-16 | 414.14 |
| -27 | 2433379 | 1950-04-07 | 413.21 |
| -26 | 2433796 | 1951-05-29 | 412.29 |
| -25 | 2434213 | 1952-07-19 | 412.15 |
| -24 | 2434619 | 1953-08-29 | 412.93 |
| -23 | 2435033 | 1954-10-17 | 413.64 |
| -22 | 2435438 | 1955-11-26 | 412.78 |
| -21 | 2435852 | 1957-01-13 | 412.07 |
| -20 | 2436272 | 1958-03-09 | 413.87 |
| -19 | 2436694 | 1959-05-05 | 415.22 |
| -18 | 2437094 | 1960-06-08 | 416.42 |
| -17 | 2437507 | 1961-07-26 | 417.07 |
| -16 | 2437939 | 1962-10-01 | 416.22 |
| -15 | 2438345 | 1963-11-11 | 417.22 |
| -14 | 2438775 | 1965-01-14 | 418.07 |
| -13 | 2439188 | 1966-03-03 | 415.57 |
| -12 | 2439605 | 1967-04-24 | 414.64 |
| -11 | 2440024 | 1968-06-16 | 414.14 |
| -10 | 2440430 | 1969-07-27 | 412.15 |
| -9 | 2440834 | 1970-09-04 | 410.86 |
| -8 | 2441255 | 1971-10-30 | 409.78 |
| -7 | 2441663 | 1972-12-11 | 407.92 |
| -6 | 2442070 | 1974-01-22 | 407.14 |
| -5 | 2442475 | 1975-03-03 | 406.51 |
| -4 | 2442891 | 1976-04-22 | 405.5 |
| -3 | 2443274 | 1977-05-10 | 406.42 |
| -2 | 2443690 | 1978-06-30 | 407.35 |
| -1 | 2444090 | 1979-08-04 | 407.64 |
| 0 | 2444505 | 1980-09-22 | 408.44 |
| 1 | 2444918 | 1981-11-09 | 409.86 |
| 2 | 2445330 | 1982-12-26 | 410.35 |
| 3 | 2445743 | 1984-02-12 | 410.21 |
| 4 | 2446140 | 1985-03-15 | 409.5 |
| 5 | 2446562 | 1986-05-11 | 408.79 |
| 6 | 2446963 | 1987-06-16 | 408.22 |
| 7 | 2447375 | 1988-08-01 | 409.64 |
| 8 | 2447781 | 1989-09-11 | 411.14 |
| 9 | 2448190 | 1990-10-25 | 413 |
| 10 | 2448598 | 1991-12-07 | 415.94 |
| 11 | 2449020 | 1993-02-01 | 417.79 |
| 12 | 2449438 | 1994-03-26 | 419.21 |
| 13 | 2449869 | 1995-05-31 | 419.07 |
| 14 | 2450292 | 1996-07-27 | 418.93 |
| 15 | 2450713 | 1997-09-21 | 419.72 |
| 16 | 2451127 | 1998-11-09 | 419.93 |
| 17 | 2451528 | 1999-12-15 | 418.99 |
| 18 | 2451955 | 2001-02-14 | 417.99 |
| 19 | 2452379 | 2002-04-14 | 418.36 |
| 20 | 2452807 | 2003-06-16 | 419.79 |
| 21 | 2453220 | 2004-08-02 | 419.86 |
| 22 | 2453637 | 2005-09-23 | 418.28 |
| 23 | 2454060 | 2006-11-20 | 416.21 |
| 24 | 2454472 | 2008-01-06 | 415.57 |
| 25 | 2454889 | 2009-02-26 | 416.58 |
| 26 | 2455301 | 2010-04-14 | 415.93 |
| 27 | 2455712 | 2011-05-30 | 414.99 |
| 28 | 2456133 | 2012-07-24 | 414.71 |
| 29 | 2456556 | 2013-09-20 | 414.86 |
| 30 | 2456964 | 2014-11-02 | 415.94 |
| 31 | 2457378 | 2015-12-21 | 416.29 |
| 32 | 2457789 | 2017-02-04 | 415.07 |
| 33 | 2458209 | 2018-03-31 | 414.28 |
| 34 | 2458627 | 2019-05-23 | 414.84 |
| 35 | 2459046 | 2020-07-15 | 416.27 |
| 36 | 2459454 | 2021-08-27 | 416.41 |
| 37 | 2459866 | 2022-10-13 | 415.68 |
| 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. |