| E | O (JD) | O (dat) | Period |
| -81 | 2411540 | 1890-06-21 | 330.88 |
| -80 | 2411870 | 1891-05-17 | 331.73 |
| -74 | 2413885 | 1896-11-21 | 332.17 |
| -73 | 2414200 | 1897-10-02 | 332.31 |
| -71 | 2414859 | 1899-07-23 | 332.88 |
| -70 | 2415201 | 1900-06-30 | 332.15 |
| -69 | 2415526 | 1901-05-21 | 330.76 |
| -68 | 2415865 | 1902-04-25 | 333 |
| -67 | 2416200 | 1903-03-26 | 334.72 |
| -66 | 2416530 | 1904-02-19 | 334.84 |
| -65 | 2416847 | 1905-01-01 | 334.22 |
| -62 | 2417873 | 1907-10-24 | 332.83 |
| -61 | 2418212 | 1908-09-27 | 333.33 |
| -60 | 2418542 | 1909-08-23 | 335.5 |
| -59 | 2418865 | 1910-07-12 | 335.5 |
| -58 | 2419191 | 1911-06-03 | 332.99 |
| -57 | 2419539 | 1912-05-16 | 331.5 |
| -56 | 2419877 | 1913-04-19 | 331.57 |
| -55 | 2420211 | 1914-03-19 | 332.82 |
| -53 | 2420869 | 1916-01-06 | 329.94 |
| -52 | 2421189 | 1916-11-21 | 326.37 |
| -51 | 2421523 | 1917-10-21 | 325.44 |
| -50 | 2421858 | 1918-09-21 | 324.47 |
| -49 | 2422151 | 1919-07-11 | 324.72 |
| -48 | 2422487 | 1920-06-11 | 324.35 |
| -47 | 2422808 | 1921-04-28 | 323.42 |
| -46 | 2423139 | 1922-03-25 | 325.43 |
| -45 | 2423465 | 1923-02-14 | 327.08 |
| -44 | 2423788 | 1924-01-03 | 327.79 |
| -43 | 2424121 | 1924-12-01 | 329.28 |
| -42 | 2424444 | 1925-10-20 | 330.35 |
| -41 | 2424773 | 1926-09-14 | 332.07 |
| -40 | 2425111 | 1927-08-18 | 332.22 |
| -39 | 2425446 | 1928-07-18 | 331.93 |
| -38 | 2425783 | 1929-06-20 | 333.14 |
| -37 | 2426119 | 1930-05-22 | 333.49 |
| -36 | 2426441 | 1931-04-09 | 332.57 |
| -35 | 2426771 | 1932-03-04 | 332.21 |
| -34 | 2427110 | 1933-02-06 | 331.06 |
| -33 | 2427443 | 1934-01-05 | 330.43 |
| -32 | 2427770 | 1934-11-28 | 331.44 |
| -30 | 2428442 | 1936-09-30 | 330.94 |
| -29 | 2428757 | 1937-08-11 | 331.57 |
| -28 | 2429090 | 1938-07-10 | 332.31 |
| -27 | 2429425 | 1939-06-10 | 329.99 |
| -26 | 2429751 | 1940-05-01 | 329.64 |
| -25 | 2430107 | 1941-04-22 | 331.08 |
| -24 | 2430423 | 1942-03-04 | 330.79 |
| -23 | 2430739 | 1943-01-14 | 331.42 |
| -22 | 2431075 | 1943-12-16 | 330.14 |
| -21 | 2431407 | 1944-11-12 | 329.22 |
| -20 | 2431739 | 1945-10-10 | 331.94 |
| -19 | 2432077 | 1946-09-13 | 333.07 |
| -18 | 2432403 | 1947-08-05 | 333.71 |
| -17 | 2432736 | 1948-07-03 | 334.99 |
| -16 | 2433073 | 1949-06-05 | 335.57 |
| -15 | 2433404 | 1950-05-02 | 335.08 |
| -14 | 2433750 | 1951-04-13 | 334.86 |
| -13 | 2434086 | 1952-03-14 | 334.21 |
| -12 | 2434428 | 1953-02-19 | 333.49 |
| -11 | 2434743 | 1953-12-31 | 333.14 |
| -10 | 2435084 | 1954-12-07 | 332.15 |
| -9 | 2435404 | 1955-10-23 | 331.93 |
| -8 | 2435742 | 1956-09-25 | 332.78 |
| -7 | 2436076 | 1957-08-25 | 333.42 |
| -6 | 2436410 | 1958-07-25 | 333.86 |
| -5 | 2436751 | 1959-07-01 | 334.22 |
| -4 | 2437079 | 1960-05-24 | 333.5 |
| -3 | 2437416 | 1961-04-26 | 332.92 |
| -2 | 2437746 | 1962-03-22 | 330.49 |
| -1 | 2438079 | 1963-02-18 | 328.29 |
| 0 | 2438408 | 1964-01-13 | 327.51 |
| 1 | 2438739 | 1964-12-09 | 326.79 |
| 2 | 2439049 | 1965-10-15 | 325.78 |
| 3 | 2439377 | 1966-09-08 | 325.42 |
| 4 | 2439703 | 1967-07-31 | 324.5 |
| 5 | 2440034 | 1968-06-26 | 324.51 |
| 6 | 2440352 | 1969-05-10 | 325.72 |
| 7 | 2440691 | 1970-04-14 | 325.42 |
| 8 | 2440999 | 1971-02-16 | 324.92 |
| 9 | 2441332 | 1972-01-15 | 324.57 |
| 10 | 2441654 | 1972-12-02 | 324.08 |
| 11 | 2441982 | 1973-10-26 | 324.93 |
| 12 | 2442304 | 1974-09-13 | 326.64 |
| 13 | 2442626 | 1975-08-01 | 327.42 |
| 14 | 2442954 | 1976-06-24 | 328.43 |
| 15 | 2443285 | 1977-05-21 | 328.51 |
| 16 | 2443619 | 1978-04-20 | 329.14 |
| 17 | 2443951 | 1979-03-18 | 330.71 |
| 18 | 2444283 | 1980-02-13 | 331.28 |
| 19 | 2444602 | 1980-12-28 | 332.07 |
| 20 | 2444936 | 1981-11-27 | 333.22 |
| 21 | 2445274 | 1982-10-31 | 333.43 |
| 22 | 2445603 | 1983-09-25 | 334.49 |
| 23 | 2445950 | 1984-09-06 | 334.92 |
| 24 | 2446285 | 1985-08-07 | 334.79 |
| 25 | 2446617 | 1986-07-05 | 336.08 |
| 26 | 2446951 | 1987-06-04 | 335.79 |
| 27 | 2447276 | 1988-04-24 | 335.14 |
| 28 | 2447621 | 1989-04-04 | 335.78 |
| 29 | 2447961 | 1990-03-10 | 335.64 |
| 30 | 2448293 | 1991-02-05 | 335.94 |
| 31 | 2448634 | 1992-01-12 | 335.64 |
| 32 | 2448969 | 1992-12-12 | 334.14 |
| 33 | 2449298 | 1993-11-06 | 333.28 |
| 34 | 2449632 | 1994-10-06 | 332.5 |
| 35 | 2449964 | 1995-09-03 | 331.79 |
| 36 | 2450296 | 1996-07-31 | 331.43 |
| 37 | 2450624 | 1997-06-24 | 331.85 |
| 38 | 2450958 | 1998-05-24 | 331.57 |
| 39 | 2451290 | 1999-04-21 | 331.14 |
| 40 | 2451617 | 2000-03-13 | 331.29 |
| 41 | 2451959 | 2001-02-18 | 330.72 |
| 42 | 2452279 | 2002-01-04 | 330.64 |
| 43 | 2452617 | 2002-12-08 | 331.28 |
| 44 | 2452941 | 2003-10-28 | 331.43 |
| 45 | 2453271 | 2004-09-22 | 331.51 |
| 46 | 2453606 | 2005-08-23 | 332.07 |
| 47 | 2453939 | 2006-07-22 | 333.49 |
| 48 | 2454277 | 2007-06-25 | 334.92 |
| 49 | 2454602 | 2008-05-15 | 335.07 |
| 50 | 2454943 | 2009-04-21 | 335.01 |
| 51 | 2455284 | 2010-03-28 | 334.5 |
| 52 | 2455617 | 2011-02-24 | 333.85 |
| 53 | 2455951 | 2012-01-24 | 333.64 |
| 54 | 2456284 | 2012-12-22 | 332.64 |
| 55 | 2456615 | 2013-11-18 | 331.87 |
| 56 | 2456938 | 2014-10-07 | 331.79 |
| 57 | 2457278 | 2015-09-12 | 331.78 |
| 58 | 2457606 | 2016-08-05 | 331.35 |
| 59 | 2457941 | 2017-07-06 | 331.93 |
| 60 | 2458272 | 2018-06-02 | 332.44 |
| 61 | 2458608 | 2019-05-04 | 331.86 |
| 62 | 2458930 | 2020-03-21 | 331.87 |
| 63 | 2459270 | 2021-02-24 | 331.74 |
| 64 | 2459600 | 2022-01-20 | 330.84 |
| 65 | 2459930 | 2022-12-16 | 329.81 |
| 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. |