| E | O (JD) | O (dat) | Period |
| -70 | 2413983 | 1897-02-27 | 361.01 |
| -69 | 2414328 | 1898-02-07 | 359.42 |
| -68 | 2414682 | 1899-01-27 | 357.1 |
| -67 | 2415041 | 1900-01-21 | 353.68 |
| -66 | 2415411 | 1901-01-26 | 352.81 |
| -64 | 2416122 | 1903-01-07 | 352.44 |
| -63 | 2416470 | 1903-12-21 | 351.94 |
| -62 | 2416803 | 1904-11-18 | 352 |
| -61 | 2417153 | 1905-11-03 | 349.34 |
| -60 | 2417496 | 1906-10-12 | 349.51 |
| -59 | 2417858 | 1907-10-09 | 353.22 |
| -58 | 2418226 | 1908-10-11 | 353.57 |
| -57 | 2418547 | 1909-08-28 | 351.92 |
| -56 | 2418938 | 1910-09-23 | 352.57 |
| -55 | 2419280 | 1911-08-31 | 351.21 |
| -54 | 2419626 | 1912-08-11 | 349.64 |
| -53 | 2419950 | 1913-07-01 | 348.35 |
| -52 | 2420340 | 1914-07-26 | 345.72 |
| -51 | 2420661 | 1915-06-12 | 349.72 |
| -50 | 2421007 | 1916-05-23 | 354.08 |
| -49 | 2421355 | 1917-05-06 | 352.69 |
| -48 | 2421703 | 1918-04-19 | 352.5 |
| -47 | 2422099 | 1919-05-20 | 354.81 |
| -45 | 2422788 | 1921-04-08 | 355.94 |
| -44 | 2423145 | 1922-03-31 | 355.69 |
| -43 | 2423496 | 1923-03-17 | 351.43 |
| -42 | 2423849 | 1924-03-04 | 347.6 |
| -41 | 2424208 | 1925-02-26 | 345.93 |
| -40 | 2424541 | 1926-01-25 | 344.08 |
| -39 | 2424884 | 1927-01-03 | 342.65 |
| -38 | 2425217 | 1927-12-02 | 341.43 |
| -37 | 2425559 | 1928-11-08 | 342.07 |
| -36 | 2425899 | 1929-10-14 | 343.14 |
| -35 | 2426243 | 1930-09-23 | 344.21 |
| -34 | 2426594 | 1931-09-09 | 345.28 |
| -33 | 2426944 | 1932-08-24 | 345.92 |
| -32 | 2427285 | 1933-07-31 | 348.5 |
| -31 | 2427635 | 1934-07-16 | 350.79 |
| -30 | 2427975 | 1935-06-21 | 352.15 |
| -29 | 2428326 | 1936-06-06 | 354.15 |
| -28 | 2428695 | 1937-06-10 | 354.92 |
| -27 | 2429053 | 1938-06-03 | 355.85 |
| -26 | 2429415 | 1939-05-31 | 358 |
| -25 | 2429772 | 1940-05-22 | 357 |
| -24 | 2430117 | 1941-05-02 | 354.57 |
| -23 | 2430475 | 1942-04-25 | 354.42 |
| -22 | 2430838 | 1943-04-23 | 354 |
| -21 | 2431181 | 1944-03-31 | 353.58 |
| -20 | 2431531 | 1945-03-16 | 353.3 |
| -19 | 2431899 | 1946-03-19 | 351.65 |
| -18 | 2432244 | 1947-02-27 | 350.35 |
| -17 | 2432595 | 1948-02-13 | 350 |
| -16 | 2432943 | 1949-01-26 | 349.71 |
| -15 | 2433293 | 1950-01-11 | 349.28 |
| -14 | 2433631 | 1950-12-15 | 350.21 |
| -13 | 2433981 | 1951-11-30 | 351.35 |
| -12 | 2434345 | 1952-11-28 | 351.72 |
| -11 | 2434688 | 1953-11-06 | 352.72 |
| -10 | 2435054 | 1954-11-07 | 353.94 |
| -9 | 2435403 | 1955-10-22 | 354.22 |
| -8 | 2435757 | 1956-10-10 | 354.78 |
| -7 | 2436105 | 1957-09-23 | 353.57 |
| -6 | 2436462 | 1958-09-15 | 352.57 |
| -5 | 2436823 | 1959-09-11 | 353.85 |
| -4 | 2437177 | 1960-08-30 | 353.78 |
| -3 | 2437515 | 1961-08-03 | 353.14 |
| -2 | 2437878 | 1962-08-01 | 353 |
| -1 | 2438236 | 1963-07-25 | 352.01 |
| 0 | 2438579 | 1964-07-02 | 352.08 |
| 1 | 2438932 | 1965-06-20 | 354.51 |
| 2 | 2439295 | 1966-06-18 | 355.07 |
| 3 | 2439633 | 1967-05-22 | 357.14 |
| 4 | 2439988 | 1968-05-11 | 359.35 |
| 5 | 2440368 | 1969-05-26 | 358 |
| 6 | 2440717 | 1970-05-10 | 358.57 |
| 7 | 2441098 | 1971-05-26 | 359.57 |
| 8 | 2441444 | 1972-05-06 | 357.92 |
| 9 | 2441795 | 1973-04-22 | 356.43 |
| 10 | 2442153 | 1974-04-15 | 353.65 |
| 11 | 2442502 | 1975-03-30 | 351.8 |
| 12 | 2442865 | 1976-03-27 | 352.36 |
| 13 | 2443210 | 1977-03-07 | 352.35 |
| 14 | 2443556 | 1978-02-16 | 352.14 |
| 15 | 2443911 | 1979-02-06 | 349.64 |
| 16 | 2444261 | 1980-01-22 | 347.71 |
| 17 | 2444620 | 1981-01-15 | 348 |
| 18 | 2444965 | 1981-12-26 | 347.21 |
| 19 | 2445297 | 1982-11-23 | 346.36 |
| 20 | 2445646 | 1983-11-07 | 345.72 |
| 21 | 2445992 | 1984-10-18 | 345.08 |
| 22 | 2446336 | 1985-09-27 | 346.07 |
| 23 | 2446685 | 1986-09-11 | 346.92 |
| 24 | 2447036 | 1987-08-28 | 345.85 |
| 25 | 2447380 | 1988-08-06 | 345.35 |
| 26 | 2447727 | 1989-07-19 | 345.28 |
| 27 | 2448073 | 1990-06-30 | 345.07 |
| 28 | 2448407 | 1991-05-30 | 345.28 |
| 29 | 2448756 | 1992-05-13 | 345.15 |
| 30 | 2449099 | 1993-04-21 | 345.65 |
| 31 | 2449453 | 1994-04-10 | 344.5 |
| 32 | 2449797 | 1995-03-20 | 343.28 |
| 33 | 2450142 | 1996-02-28 | 344.64 |
| 34 | 2450497 | 1997-02-17 | 344.57 |
| 35 | 2450806 | 1997-12-23 | 344.07 |
| 36 | 2451163 | 1998-12-15 | 344.85 |
| 37 | 2451517 | 1999-12-04 | 345.21 |
| 38 | 2451859 | 2000-11-10 | 347.65 |
| 39 | 2452208 | 2001-10-25 | 350.37 |
| 40 | 2452559 | 2002-10-11 | 350.94 |
| 41 | 2452913 | 2003-09-30 | 351.07 |
| 42 | 2453257 | 2004-09-08 | 351.07 |
| 43 | 2453617 | 2005-09-03 | 352.64 |
| 44 | 2453976 | 2006-08-28 | 353.71 |
| 45 | 2454315 | 2007-08-02 | 353 |
| 46 | 2454667 | 2008-07-19 | 351.92 |
| 47 | 2455037 | 2009-07-24 | 350.64 |
| 48 | 2455387 | 2010-07-09 | 352.36 |
| 49 | 2455725 | 2011-06-12 | 355.08 |
| 50 | 2456076 | 2012-05-28 | 356.08 |
| 51 | 2456426 | 2013-05-13 | 356.72 |
| 52 | 2456798 | 2014-05-20 | 357.15 |
| 53 | 2457155 | 2015-05-12 | 357.64 |
| 54 | 2457534 | 2016-05-25 | 359.14 |
| 55 | 2457884 | 2017-05-10 | 359.07 |
| 56 | 2458228 | 2018-04-19 | 357.28 |
| 57 | 2458580 | 2019-04-06 | 355.34 |
| 58 | 2458950 | 2020-04-10 | 352.44 |
| 59 | 2459301 | 2021-03-27 | 355.08 |
| 60 | 2459654 | 2022-03-15 | 357.31 |
| 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. |