| E | O (JD) | O (dat) | Period |
| -90 | 2415566 | 1901-06-30 | 305.34 |
| -88 | 2416160 | 1903-02-14 | 301.17 |
| -87 | 2416460 | 1903-12-11 | 297.78 |
| -85 | 2417095 | 1905-09-06 | 296.82 |
| -84 | 2417389 | 1906-06-27 | 298.53 |
| -83 | 2417661 | 1907-03-26 | 300.78 |
| -82 | 2417968 | 1908-01-27 | 298.51 |
| -81 | 2418228 | 1908-10-13 | 297.78 |
| -80 | 2418573 | 1909-09-23 | 299.29 |
| -72 | 2420965 | 1916-04-11 | 299.68 |
| -71 | 2421247 | 1917-01-18 | 301.29 |
| -70 | 2421575 | 1917-12-12 | 300.68 |
| -69 | 2421855 | 1918-09-18 | 298.57 |
| -68 | 2422165 | 1919-07-25 | 300 |
| -67 | 2422467 | 1920-05-22 | 299.42 |
| -66 | 2422753 | 1921-03-04 | 299.21 |
| -65 | 2423055 | 1921-12-31 | 300.07 |
| -64 | 2423357 | 1922-10-29 | 300.42 |
| -63 | 2423657 | 1923-08-25 | 303 |
| -62 | 2423962 | 1924-06-25 | 304.57 |
| -61 | 2424259 | 1925-04-18 | 305.58 |
| -60 | 2424579 | 1926-03-04 | 306.01 |
| -59 | 2424883 | 1927-01-02 | 304.79 |
| -58 | 2425189 | 1927-11-04 | 304.78 |
| -57 | 2425501 | 1928-09-11 | 305.07 |
| -56 | 2425797 | 1929-07-04 | 304.28 |
| -55 | 2426089 | 1930-04-22 | 305.57 |
| -54 | 2426399 | 1931-02-26 | 306.14 |
| -53 | 2426710 | 1932-01-03 | 306.21 |
| -52 | 2427012 | 1932-10-31 | 308.86 |
| -51 | 2427338 | 1933-09-22 | 310.8 |
| -50 | 2427638 | 1934-07-19 | 310.44 |
| -49 | 2427947 | 1935-05-24 | 310.15 |
| -48 | 2428263 | 1936-04-04 | 309.93 |
| -47 | 2428576 | 1937-02-11 | 309.92 |
| -46 | 2428879 | 1937-12-11 | 309.64 |
| -45 | 2429185 | 1938-10-13 | 307.57 |
| -44 | 2429504 | 1939-08-28 | 305.92 |
| -43 | 2429811 | 1940-06-30 | 306.92 |
| -42 | 2430109 | 1941-04-24 | 308.07 |
| -41 | 2430407 | 1942-02-16 | 307.5 |
| -40 | 2430715 | 1942-12-21 | 309.01 |
| -39 | 2431037 | 1943-11-08 | 311.58 |
| -38 | 2431340 | 1944-09-06 | 311.86 |
| -37 | 2431654 | 1945-07-17 | 311.57 |
| -36 | 2431987 | 1946-06-15 | 310.57 |
| -35 | 2432295 | 1947-04-19 | 309.64 |
| -34 | 2432587 | 1948-02-05 | 310.35 |
| -33 | 2432897 | 1948-12-11 | 308.28 |
| -32 | 2433203 | 1949-10-13 | 305.42 |
| -31 | 2433509 | 1950-08-15 | 306.29 |
| -30 | 2433830 | 1951-07-02 | 308.08 |
| -29 | 2434127 | 1952-04-24 | 309.22 |
| -28 | 2434431 | 1953-02-22 | 309.28 |
| -27 | 2434739 | 1953-12-27 | 307.71 |
| -26 | 2435058 | 1954-11-11 | 306.92 |
| -25 | 2435371 | 1955-09-20 | 307.64 |
| -24 | 2435671 | 1956-07-16 | 307.5 |
| -23 | 2435976 | 1957-05-17 | 305.85 |
| -22 | 2436278 | 1958-03-15 | 304.65 |
| -21 | 2436587 | 1959-01-18 | 304.15 |
| -20 | 2436888 | 1959-11-15 | 303.51 |
| -19 | 2437191 | 1960-09-13 | 303.36 |
| -18 | 2437503 | 1961-07-22 | 302.78 |
| -17 | 2437797 | 1962-05-12 | 302.71 |
| -16 | 2438099 | 1963-03-10 | 302.42 |
| -15 | 2438402 | 1964-01-07 | 301.07 |
| -14 | 2438702 | 1964-11-02 | 301.42 |
| -13 | 2439011 | 1965-09-07 | 301.5 |
| -12 | 2439302 | 1966-06-25 | 300.29 |
| -11 | 2439607 | 1967-04-26 | 300.51 |
| -10 | 2439913 | 1968-02-26 | 300.87 |
| -9 | 2440204 | 1968-12-13 | 299.93 |
| -8 | 2440501 | 1969-10-06 | 299.5 |
| -7 | 2440810 | 1970-08-11 | 299.14 |
| -6 | 2441115 | 1971-06-12 | 299.42 |
| -5 | 2441397 | 1972-03-20 | 300.78 |
| -4 | 2441705 | 1973-01-22 | 301.35 |
| -3 | 2442003 | 1973-11-16 | 301.07 |
| -2 | 2442306 | 1974-09-15 | 302.15 |
| -1 | 2442610 | 1975-07-16 | 303.44 |
| 0 | 2442920 | 1976-05-21 | 304.08 |
| 1 | 2443220 | 1977-03-17 | 305.01 |
| 2 | 2443522 | 1978-01-13 | 305.65 |
| 3 | 2443828 | 1978-11-15 | 305.92 |
| 4 | 2444137 | 1979-09-20 | 305.57 |
| 5 | 2444442 | 1980-07-21 | 305.71 |
| 6 | 2444753 | 1981-05-28 | 305.57 |
| 7 | 2445060 | 1982-03-31 | 305.28 |
| 8 | 2445358 | 1983-01-23 | 305.5 |
| 9 | 2445664 | 1983-11-25 | 304.93 |
| 10 | 2445964 | 1984-09-20 | 303.87 |
| 11 | 2446275 | 1985-07-28 | 304.15 |
| 12 | 2446581 | 1986-05-30 | 304.43 |
| 13 | 2446883 | 1987-03-28 | 304.78 |
| 14 | 2447184 | 1988-01-23 | 305.14 |
| 15 | 2447492 | 1988-11-26 | 304.92 |
| 16 | 2447792 | 1989-09-22 | 305.28 |
| 17 | 2448103 | 1990-07-30 | 305.85 |
| 18 | 2448408 | 1991-05-31 | 306.28 |
| 19 | 2448717 | 1992-04-04 | 306.79 |
| 20 | 2449021 | 1993-02-02 | 306.94 |
| 21 | 2449328 | 1993-12-06 | 306.94 |
| 22 | 2449636 | 1994-10-10 | 307.22 |
| 23 | 2449943 | 1995-08-13 | 306.92 |
| 24 | 2450249 | 1996-06-14 | 306.28 |
| 25 | 2450559 | 1997-04-20 | 305.57 |
| 26 | 2450867 | 1998-02-22 | 304.78 |
| 27 | 2451168 | 1998-12-20 | 303.5 |
| 28 | 2451469 | 1999-10-17 | 302.28 |
| 29 | 2451773 | 2000-08-16 | 300.93 |
| 30 | 2452073 | 2001-06-12 | 299.72 |
| 31 | 2452368 | 2002-04-03 | 299.57 |
| 32 | 2452672 | 2003-02-01 | 299.35 |
| 33 | 2452967 | 2003-11-23 | 299.35 |
| 34 | 2453264 | 2004-09-15 | 299.28 |
| 35 | 2453567 | 2005-07-15 | 298.42 |
| 36 | 2453866 | 2006-05-10 | 297.92 |
| 37 | 2454171 | 2007-03-11 | 298.14 |
| 38 | 2454460 | 2007-12-25 | 297.93 |
| 39 | 2454758 | 2008-10-18 | 297.65 |
| 40 | 2455052 | 2009-08-08 | 297.58 |
| 41 | 2455353 | 2010-06-05 | 298.15 |
| 42 | 2455649 | 2011-03-28 | 299.35 |
| 43 | 2455951 | 2012-01-24 | 300.14 |
| 44 | 2456252 | 2012-11-20 | 300.85 |
| 45 | 2456553 | 2013-09-17 | 302.85 |
| 46 | 2456856 | 2014-07-17 | 304.92 |
| 47 | 2457156 | 2015-05-13 | 305.71 |
| 48 | 2457461 | 2016-03-13 | 307.29 |
| 49 | 2457781 | 2017-01-27 | 308.37 |
| 50 | 2458088 | 2017-11-30 | 308.72 |
| 51 | 2458395 | 2018-10-03 | 309.44 |
| 52 | 2458712 | 2019-08-16 | 308.36 |
| 53 | 2459014 | 2020-06-13 | 307.4 |
| 54 | 2459320 | 2021-04-15 | 308.43 |
| 55 | 2459629 | 2022-02-18 | 306.59 |
| 56 | 2459930 | 2022-12-16 | 304.5 |
| 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. |