| E | O (JD) | O (dat) | Period |
| -88 | 2407058 | 1878-03-14 | 397.66 |
| -78 | 2411031 | 1889-01-28 | 398.08 |
| -68 | 2415041 | 1900-01-21 | 398.45 |
| -67 | 2415437 | 1901-02-21 | 398.41 |
| -57 | 2419399 | 1911-12-28 | 398.52 |
| -50 | 2422201 | 1919-08-30 | 397.98 |
| -49 | 2422597 | 1920-09-29 | 397.32 |
| -48 | 2422995 | 1921-11-01 | 397.6 |
| -47 | 2423389 | 1922-11-30 | 397.05 |
| -46 | 2423776 | 1923-12-22 | 394.43 |
| -45 | 2424184 | 1925-02-02 | 392.57 |
| -44 | 2424568 | 1926-02-21 | 392.29 |
| -43 | 2424973 | 1927-04-02 | 392.79 |
| -42 | 2425347 | 1928-04-10 | 391.36 |
| -41 | 2425741 | 1929-05-09 | 390.14 |
| -40 | 2426135 | 1930-06-07 | 390.07 |
| -39 | 2426529 | 1931-07-06 | 391.21 |
| -38 | 2426910 | 1932-07-21 | 392.79 |
| -37 | 2427304 | 1933-08-19 | 392.36 |
| -36 | 2427698 | 1934-09-17 | 392.86 |
| -35 | 2428099 | 1935-10-23 | 394.79 |
| -34 | 2428488 | 1936-11-15 | 397.36 |
| -33 | 2428881 | 1937-12-13 | 398.57 |
| -32 | 2429283 | 1939-01-19 | 398.93 |
| -31 | 2429683 | 1940-02-23 | 399.57 |
| -30 | 2430094 | 1941-04-09 | 401.21 |
| -29 | 2430488 | 1942-05-08 | 402.79 |
| -28 | 2430894 | 1943-06-18 | 403.21 |
| -27 | 2431287 | 1944-07-15 | 403 |
| -26 | 2431699 | 1945-08-31 | 403.71 |
| -25 | 2432104 | 1946-10-10 | 404.71 |
| -24 | 2432507 | 1947-11-17 | 404.86 |
| -23 | 2432912 | 1948-12-26 | 404.36 |
| -22 | 2433322 | 1950-02-09 | 402.93 |
| -21 | 2433726 | 1951-03-20 | 401.21 |
| -20 | 2434123 | 1952-04-20 | 398.21 |
| -19 | 2434524 | 1953-05-26 | 395.64 |
| -18 | 2434920 | 1954-06-26 | 393.71 |
| -17 | 2435308 | 1955-07-19 | 391.64 |
| -16 | 2435686 | 1956-07-31 | 389.36 |
| -15 | 2436087 | 1957-09-05 | 387.57 |
| -14 | 2436473 | 1958-09-26 | 386.86 |
| -13 | 2436859 | 1959-10-17 | 387.07 |
| -12 | 2437239 | 1960-10-31 | 386.36 |
| -11 | 2437631 | 1961-11-27 | 385.21 |
| -10 | 2438013 | 1962-12-14 | 386.36 |
| -9 | 2438400 | 1964-01-05 | 388 |
| -8 | 2438782 | 1965-01-21 | 389.29 |
| -7 | 2439171 | 1966-02-14 | 390.36 |
| -6 | 2439570 | 1967-03-20 | 391.64 |
| -5 | 2439960 | 1968-04-13 | 393.14 |
| -4 | 2440360 | 1969-05-18 | 395.57 |
| -3 | 2440749 | 1970-06-11 | 396.93 |
| -2 | 2441147 | 1971-07-14 | 396.57 |
| -1 | 2441539 | 1972-08-09 | 396.57 |
| 0 | 2441952 | 1973-09-26 | 397.71 |
| 1 | 2442346 | 1974-10-25 | 398.64 |
| 2 | 2442736 | 1975-11-19 | 399.36 |
| 3 | 2443136 | 1976-12-23 | 398.79 |
| 4 | 2443541 | 1978-02-01 | 397.64 |
| 5 | 2443936 | 1979-03-03 | 398.93 |
| 6 | 2444341 | 1980-04-11 | 399.43 |
| 7 | 2444733 | 1981-05-08 | 398.93 |
| 8 | 2445132 | 1982-06-11 | 398 |
| 9 | 2445535 | 1983-07-19 | 396.14 |
| 10 | 2445929 | 1984-08-16 | 395.57 |
| 11 | 2446333 | 1985-09-24 | 395.21 |
| 12 | 2446716 | 1986-10-12 | 393.57 |
| 13 | 2447107 | 1987-11-07 | 392.21 |
| 14 | 2447505 | 1988-12-09 | 391.43 |
| 15 | 2447893 | 1990-01-01 | 391.93 |
| 16 | 2448284 | 1991-01-27 | 392.07 |
| 17 | 2448671 | 1992-02-18 | 390.71 |
| 18 | 2449071 | 1993-03-24 | 390.43 |
| 19 | 2449465 | 1994-04-22 | 391.21 |
| 20 | 2449847 | 1995-05-09 | 392.21 |
| 21 | 2450235 | 1996-05-31 | 392.79 |
| 22 | 2450629 | 1997-06-29 | 391.43 |
| 23 | 2451025 | 1998-07-30 | 390.93 |
| 24 | 2451421 | 1999-08-30 | 392.36 |
| 25 | 2451820 | 2000-10-02 | 392.86 |
| 26 | 2452196 | 2001-10-13 | 392.57 |
| 27 | 2452589 | 2002-11-10 | 392.79 |
| 28 | 2452986 | 2003-12-12 | 392.29 |
| 29 | 2453378 | 2005-01-07 | 393.36 |
| 30 | 2453772 | 2006-02-05 | 396.36 |
| 31 | 2454173 | 2007-03-13 | 396.5 |
| 32 | 2454560 | 2008-04-03 | 396 |
| 33 | 2454963 | 2009-05-11 | 397.21 |
| 34 | 2455371 | 2010-06-23 | 397.43 |
| 35 | 2455755 | 2011-07-12 | 397.64 |
| 36 | 2456153 | 2012-08-13 | 397.36 |
| 37 | 2456558 | 2013-09-22 | 394.57 |
| 38 | 2456951 | 2014-10-20 | 393.43 |
| 39 | 2457349 | 2015-11-22 | 393.14 |
| 40 | 2457737 | 2016-12-14 | 391.5 |
| 41 | 2458121 | 2018-01-02 | 390.79 |
| 42 | 2458513 | 2019-01-29 | 390.03 |
| 43 | 2458899 | 2020-02-19 | 388.46 |
| 44 | 2459293 | 2021-03-19 | 389.67 |
| 45 | 2459687 | 2022-04-17 | 390.8 |
| 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. |