| E | O (JD) | O (dat) | Period |
| -57 | 2417098 | 1905-09-09 | 416.22 |
| -56 | 2417508 | 1906-10-24 | 412.91 |
| -55 | 2417934 | 1907-12-24 | 411.32 |
| -54 | 2418354 | 1909-02-16 | 410.99 |
| -53 | 2418764 | 1910-04-02 | 410.68 |
| -48 | 2420812 | 1915-11-10 | 410.25 |
| -47 | 2421221 | 1916-12-23 | 409.93 |
| -46 | 2421618 | 1918-01-24 | 408.96 |
| -42 | 2423255 | 1922-07-19 | 407.95 |
| -41 | 2423674 | 1923-09-11 | 409.2 |
| -40 | 2424092 | 1924-11-02 | 410.5 |
| -39 | 2424477 | 1925-11-22 | 409.23 |
| -38 | 2424890 | 1927-01-09 | 407.06 |
| -37 | 2425327 | 1928-03-21 | 406.36 |
| -36 | 2425722 | 1929-04-20 | 408.79 |
| -35 | 2426108 | 1930-05-11 | 411.29 |
| -34 | 2426520 | 1931-06-27 | 409.01 |
| -33 | 2426935 | 1932-08-15 | 406.79 |
| -32 | 2427357 | 1933-10-11 | 408.29 |
| -31 | 2427768 | 1934-11-26 | 410.07 |
| -30 | 2428175 | 1936-01-07 | 410.99 |
| -29 | 2428569 | 1937-02-04 | 409.71 |
| -28 | 2428977 | 1938-03-19 | 408.35 |
| -27 | 2429392 | 1939-05-08 | 408.43 |
| -26 | 2429817 | 1940-07-06 | 409.15 |
| -25 | 2430211 | 1941-08-04 | 411.01 |
| -24 | 2430631 | 1942-09-28 | 412.51 |
| -23 | 2431030 | 1943-11-01 | 412.43 |
| -22 | 2431442 | 1944-12-17 | 412.86 |
| -21 | 2431858 | 1946-02-06 | 414.57 |
| -20 | 2432286 | 1947-04-10 | 415.49 |
| -19 | 2432697 | 1948-05-25 | 416.21 |
| -18 | 2433111 | 1949-07-13 | 415.5 |
| -17 | 2433535 | 1950-09-10 | 412.86 |
| -16 | 2433943 | 1951-10-23 | 411.36 |
| -15 | 2434356 | 1952-12-09 | 411.94 |
| -14 | 2434761 | 1954-01-18 | 410.44 |
| -13 | 2435163 | 1955-02-24 | 407.43 |
| -12 | 2435579 | 1956-04-15 | 406.14 |
| -11 | 2435996 | 1957-06-06 | 405.42 |
| -10 | 2436396 | 1958-07-11 | 406.71 |
| -9 | 2436786 | 1959-08-05 | 407.21 |
| -8 | 2437199 | 1960-09-21 | 406.92 |
| -7 | 2437594 | 1961-10-21 | 408.43 |
| -6 | 2438024 | 1962-12-25 | 410.72 |
| -5 | 2438419 | 1964-01-24 | 413.22 |
| -4 | 2438853 | 1965-04-02 | 414.44 |
| -3 | 2439257 | 1966-05-11 | 411.64 |
| -2 | 2439675 | 1967-07-03 | 408.64 |
| -1 | 2440095 | 1968-08-26 | 408.71 |
| 0 | 2440500 | 1969-10-05 | 408.64 |
| 1 | 2440881 | 1970-10-21 | 408.86 |
| 2 | 2441283 | 1971-11-27 | 407.5 |
| 3 | 2441711 | 1973-01-28 | 405.79 |
| 4 | 2442120 | 1974-03-13 | 407.51 |
| 5 | 2442536 | 1975-05-03 | 409.65 |
| 6 | 2442939 | 1976-06-09 | 408.44 |
| 7 | 2443337 | 1977-07-12 | 406.29 |
| 8 | 2443749 | 1978-08-28 | 404.06 |
| 9 | 2444150 | 1979-10-03 | 403.56 |
| 10 | 2444562 | 1980-11-18 | 405.49 |
| 11 | 2444957 | 1981-12-18 | 406.35 |
| 12 | 2445356 | 1983-01-21 | 406.71 |
| 13 | 2445769 | 1984-03-09 | 407.86 |
| 14 | 2446184 | 1985-04-28 | 409.65 |
| 15 | 2446591 | 1986-06-09 | 410.79 |
| 16 | 2447002 | 1987-07-25 | 410.94 |
| 17 | 2447420 | 1988-09-15 | 410.5 |
| 18 | 2447834 | 1989-11-03 | 409.57 |
| 19 | 2448230 | 1990-12-04 | 410 |
| 20 | 2448648 | 1992-01-26 | 410.28 |
| 21 | 2449052 | 1993-03-05 | 409.71 |
| 22 | 2449457 | 1994-04-14 | 409.28 |
| 23 | 2449876 | 1995-06-07 | 409.07 |
| 24 | 2450290 | 1996-07-25 | 409.22 |
| 25 | 2450700 | 1997-09-08 | 410.36 |
| 26 | 2451094 | 1998-10-07 | 410.01 |
| 27 | 2451511 | 1999-11-28 | 408.43 |
| 28 | 2451918 | 2001-01-08 | 407.64 |
| 29 | 2452336 | 2002-03-02 | 408.71 |
| 30 | 2452737 | 2003-04-07 | 410.49 |
| 31 | 2453147 | 2004-05-21 | 410.35 |
| 32 | 2453550 | 2005-06-28 | 409.85 |
| 33 | 2453966 | 2006-08-18 | 409.43 |
| 34 | 2454386 | 2007-10-12 | 408.08 |
| 35 | 2454788 | 2008-11-17 | 407.22 |
| 36 | 2455204 | 2010-01-07 | 408.94 |
| 37 | 2455601 | 2011-02-08 | 409.57 |
| 38 | 2455996 | 2012-03-09 | 408.43 |
| 39 | 2456402 | 2013-04-19 | 407.64 |
| 40 | 2456839 | 2014-06-30 | 406.64 |
| 41 | 2457247 | 2015-08-12 | 407.06 |
| 42 | 2457645 | 2016-09-13 | 408.14 |
| 43 | 2458054 | 2017-10-27 | 405.07 |
| 44 | 2458444 | 2018-11-21 | 401.64 |
| 45 | 2458852 | 2020-01-03 | 401.83 |
| 46 | 2459260 | 2021-02-14 | 400.84 |
| 47 | 2459652 | 2022-03-13 | 399.22 |
| 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. |