| E | O (JD) | O (dat) | Period |
| -68 | 2415270 | 1900-09-07 | 347.36 |
| -67 | 2415620 | 1901-08-23 | 347.42 |
| -49 | 2421864 | 1918-09-27 | 346.97 |
| -46 | 2422890 | 1921-07-19 | 346.63 |
| -45 | 2423253 | 1922-07-17 | 346.71 |
| -44 | 2423602 | 1923-07-01 | 346.73 |
| -43 | 2423937 | 1924-05-31 | 347.96 |
| -39 | 2425326 | 1928-03-20 | 348.26 |
| -38 | 2425673 | 1929-03-02 | 347.46 |
| -37 | 2426027 | 1930-02-19 | 347.9 |
| -36 | 2426382 | 1931-02-09 | 348.71 |
| -35 | 2426726 | 1932-01-19 | 348.86 |
| -34 | 2427078 | 1933-01-05 | 347.5 |
| -33 | 2427419 | 1933-12-12 | 347.38 |
| -32 | 2427772 | 1934-11-30 | 349.13 |
| -30 | 2428460 | 1936-10-18 | 350.06 |
| -29 | 2428800 | 1937-09-23 | 350.5 |
| -28 | 2429167 | 1938-09-25 | 350.63 |
| -27 | 2429527 | 1939-09-20 | 350.14 |
| -26 | 2429878 | 1940-09-05 | 349.78 |
| -25 | 2430227 | 1941-08-20 | 348.14 |
| -24 | 2430574 | 1942-08-02 | 345.64 |
| -23 | 2430910 | 1943-07-04 | 344.14 |
| -22 | 2431247 | 1944-06-05 | 343.28 |
| -21 | 2431594 | 1945-05-18 | 342.36 |
| -20 | 2431939 | 1946-04-28 | 342.64 |
| -19 | 2432284 | 1947-04-08 | 343.93 |
| -18 | 2432627 | 1948-03-16 | 344.5 |
| -17 | 2432967 | 1949-02-19 | 345.28 |
| -16 | 2433314 | 1950-02-01 | 346.21 |
| -15 | 2433658 | 1951-01-11 | 345.71 |
| -14 | 2434006 | 1951-12-25 | 346.86 |
| -13 | 2434361 | 1952-12-14 | 348.86 |
| -12 | 2434709 | 1953-11-27 | 348.79 |
| -11 | 2435042 | 1954-10-26 | 349.51 |
| -10 | 2435408 | 1955-10-27 | 349.21 |
| -9 | 2435757 | 1956-10-10 | 348.15 |
| -8 | 2436098 | 1957-09-16 | 349.36 |
| -7 | 2436459 | 1958-09-12 | 349.21 |
| -6 | 2436797 | 1959-08-16 | 347.07 |
| -5 | 2437147 | 1960-07-31 | 347.07 |
| -4 | 2437495 | 1961-07-14 | 347.28 |
| -3 | 2437844 | 1962-06-28 | 347.28 |
| -2 | 2438180 | 1963-05-30 | 347.78 |
| -1 | 2438534 | 1964-05-18 | 347.5 |
| 0 | 2438885 | 1965-05-04 | 347.21 |
| 1 | 2439233 | 1966-04-17 | 347.78 |
| 2 | 2439580 | 1967-03-30 | 348.07 |
| 3 | 2439927 | 1968-03-11 | 347.28 |
| 4 | 2440273 | 1969-02-20 | 346.93 |
| 5 | 2440620 | 1970-02-02 | 346.86 |
| 6 | 2440967 | 1971-01-15 | 346.57 |
| 7 | 2441314 | 1971-12-28 | 347.14 |
| 8 | 2441661 | 1972-12-09 | 348.01 |
| 9 | 2442008 | 1973-11-21 | 348.15 |
| 10 | 2442351 | 1974-10-30 | 348.07 |
| 11 | 2442709 | 1975-10-23 | 347.86 |
| 12 | 2443056 | 1976-10-04 | 347.79 |
| 13 | 2443405 | 1977-09-18 | 347.93 |
| 14 | 2443749 | 1978-08-28 | 347.21 |
| 15 | 2444096 | 1979-08-10 | 346.36 |
| 16 | 2444442 | 1980-07-21 | 346.93 |
| 17 | 2444788 | 1981-07-02 | 347.57 |
| 18 | 2445133 | 1982-06-12 | 349.21 |
| 19 | 2445481 | 1983-05-26 | 351.07 |
| 20 | 2445837 | 1984-05-16 | 352.5 |
| 21 | 2446183 | 1985-04-27 | 353.72 |
| 22 | 2446551 | 1986-04-30 | 353.93 |
| 23 | 2446902 | 1987-04-16 | 353.28 |
| 24 | 2447263 | 1988-04-11 | 353 |
| 25 | 2447610 | 1989-03-24 | 350.78 |
| 26 | 2447959 | 1990-03-08 | 347.57 |
| 27 | 2448305 | 1991-02-17 | 345.64 |
| 28 | 2448657 | 1992-02-04 | 343.28 |
| 29 | 2448988 | 1992-12-31 | 343 |
| 30 | 2449331 | 1993-12-09 | 343.71 |
| 31 | 2449673 | 1994-11-16 | 343.71 |
| 32 | 2450006 | 1995-10-15 | 345.28 |
| 33 | 2450365 | 1996-10-08 | 347.43 |
| 34 | 2450711 | 1997-09-19 | 349.71 |
| 35 | 2451063 | 1998-09-06 | 352.21 |
| 36 | 2451416 | 1999-08-25 | 352.43 |
| 37 | 2451767 | 2000-08-10 | 351.57 |
| 38 | 2452133 | 2001-08-11 | 350.22 |
| 39 | 2452477 | 2002-07-21 | 348.86 |
| 40 | 2452828 | 2003-07-07 | 349.57 |
| 41 | 2453170 | 2004-06-13 | 349.08 |
| 42 | 2453507 | 2005-05-16 | 348.15 |
| 43 | 2453856 | 2006-04-30 | 348.57 |
| 44 | 2454221 | 2007-04-30 | 348.78 |
| 45 | 2454566 | 2008-04-09 | 349.21 |
| 46 | 2454918 | 2009-03-27 | 349.93 |
| 47 | 2455267 | 2010-03-11 | 349.43 |
| 48 | 2455614 | 2011-02-21 | 348.78 |
| 49 | 2455952 | 2012-01-25 | 348.07 |
| 50 | 2456310 | 2013-01-17 | 347.57 |
| 51 | 2456659 | 2014-01-01 | 348.14 |
| 52 | 2457011 | 2014-12-19 | 349.14 |
| 53 | 2457346 | 2015-11-19 | 349 |
| 54 | 2457705 | 2016-11-12 | 347.43 |
| 55 | 2458050 | 2017-10-23 | 347.14 |
| 56 | 2458404 | 2018-10-12 | 348.57 |
| 57 | 2458744 | 2019-09-17 | 349.11 |
| 58 | 2459089 | 2020-08-27 | 347.81 |
| 59 | 2459441 | 2021-08-14 | 346.84 |
| 60 | 2459796 | 2022-08-04 | 345.39 |
| 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. |