| E | O (JD) | O (dat) | Period |
| -89 | 2414946 | 1899-10-18 | 301.67 |
| -88 | 2415258 | 1900-08-26 | 301.59 |
| -87 | 2415555 | 1901-06-19 | 301.06 |
| -86 | 2415851 | 1902-04-11 | 301.55 |
| -77 | 2418570 | 1909-09-20 | 301.88 |
| -76 | 2418870 | 1910-07-17 | 302.14 |
| -74 | 2419464 | 1912-03-02 | 302.89 |
| -70 | 2420685 | 1915-07-06 | 303.2 |
| -66 | 2421896 | 1918-10-29 | 303.61 |
| -65 | 2422211 | 1919-09-09 | 304.22 |
| -64 | 2422522 | 1920-07-16 | 304 |
| -63 | 2422814 | 1921-05-04 | 303.42 |
| -62 | 2423127 | 1922-03-13 | 302.08 |
| -61 | 2423421 | 1923-01-01 | 299.85 |
| -60 | 2423720 | 1923-10-27 | 299.64 |
| -59 | 2424019 | 1924-08-21 | 299.5 |
| -58 | 2424317 | 1925-06-15 | 299.79 |
| -57 | 2424614 | 1926-04-08 | 301.65 |
| -56 | 2424917 | 1927-02-05 | 302 |
| -55 | 2425217 | 1927-12-02 | 301.78 |
| -54 | 2425528 | 1928-10-08 | 301.64 |
| -53 | 2425836 | 1929-08-12 | 301.15 |
| -52 | 2426131 | 1930-06-03 | 301.22 |
| -51 | 2426430 | 1931-03-29 | 300.57 |
| -50 | 2426724 | 1932-01-17 | 299.5 |
| -49 | 2427023 | 1932-11-11 | 300.14 |
| -48 | 2427328 | 1933-09-12 | 300.79 |
| -47 | 2427625 | 1934-07-06 | 301.15 |
| -46 | 2427932 | 1935-05-09 | 301.93 |
| -45 | 2428237 | 1936-03-09 | 301.64 |
| -44 | 2428535 | 1937-01-01 | 301.28 |
| -43 | 2428835 | 1937-10-28 | 301.5 |
| -42 | 2429139 | 1938-08-28 | 301.93 |
| -41 | 2429435 | 1939-06-20 | 302.93 |
| -40 | 2429736 | 1940-04-16 | 303.85 |
| -39 | 2430042 | 1941-02-16 | 304.78 |
| -38 | 2430354 | 1941-12-25 | 306.58 |
| -37 | 2430659 | 1942-10-26 | 308.65 |
| -36 | 2430965 | 1943-08-28 | 309.07 |
| -35 | 2431276 | 1944-07-04 | 308.07 |
| -34 | 2431590 | 1945-05-14 | 306.93 |
| -33 | 2431902 | 1946-03-22 | 306.29 |
| -32 | 2432203 | 1947-01-17 | 305.58 |
| -31 | 2432506 | 1947-11-16 | 304.71 |
| -30 | 2432804 | 1948-09-09 | 303 |
| -29 | 2433108 | 1949-07-10 | 301.5 |
| -28 | 2433411 | 1950-05-09 | 302.29 |
| -27 | 2433721 | 1951-03-15 | 303.65 |
| -26 | 2434013 | 1952-01-01 | 303.64 |
| -25 | 2434313 | 1952-10-27 | 302.5 |
| -24 | 2434628 | 1953-09-07 | 300.43 |
| -23 | 2434933 | 1954-07-09 | 299.58 |
| -22 | 2435230 | 1955-05-02 | 300.36 |
| -21 | 2435524 | 1956-02-20 | 299.57 |
| -20 | 2435814 | 1956-12-06 | 298.64 |
| -19 | 2436114 | 1957-10-02 | 298.43 |
| -18 | 2436417 | 1958-08-01 | 298.65 |
| -17 | 2436718 | 1959-05-29 | 300.36 |
| -16 | 2437024 | 1960-03-30 | 301.5 |
| -15 | 2437317 | 1961-01-17 | 301.14 |
| -14 | 2437618 | 1961-11-14 | 301.35 |
| -13 | 2437925 | 1962-09-17 | 301.86 |
| -12 | 2438224 | 1963-07-13 | 302.93 |
| -11 | 2438523 | 1964-05-07 | 304.35 |
| -10 | 2438831 | 1965-03-11 | 304.14 |
| -9 | 2439137 | 1966-01-11 | 304.93 |
| -8 | 2439445 | 1966-11-15 | 306.15 |
| -7 | 2439751 | 1967-09-17 | 305.43 |
| -6 | 2440050 | 1968-07-12 | 305.43 |
| -5 | 2440368 | 1969-05-26 | 306.5 |
| -4 | 2440665 | 1970-03-19 | 307.21 |
| -3 | 2440965 | 1971-01-13 | 307.79 |
| -2 | 2441279 | 1971-11-23 | 307.86 |
| -1 | 2441594 | 1972-10-03 | 308.14 |
| 0 | 2441903 | 1973-08-08 | 308.78 |
| 1 | 2442207 | 1974-06-08 | 308.28 |
| 2 | 2442521 | 1975-04-18 | 306.72 |
| 3 | 2442826 | 1976-02-17 | 305.22 |
| 4 | 2443127 | 1976-12-14 | 304.43 |
| 5 | 2443433 | 1977-10-16 | 303.21 |
| 6 | 2443734 | 1978-08-13 | 301.93 |
| 7 | 2444036 | 1979-06-11 | 301.72 |
| 8 | 2444336 | 1980-04-06 | 301.86 |
| 9 | 2444637 | 1981-02-01 | 301.64 |
| 10 | 2444937 | 1981-11-28 | 301.85 |
| 11 | 2445240 | 1982-09-27 | 301.93 |
| 12 | 2445546 | 1983-07-30 | 301.58 |
| 13 | 2445844 | 1984-05-23 | 301.58 |
| 14 | 2446152 | 1985-03-27 | 301.71 |
| 15 | 2446447 | 1986-01-16 | 301.28 |
| 16 | 2446748 | 1986-11-13 | 300.64 |
| 17 | 2447048 | 1987-09-09 | 300.08 |
| 18 | 2447353 | 1988-07-10 | 299.58 |
| 19 | 2447651 | 1989-05-04 | 298.93 |
| 20 | 2447948 | 1990-02-25 | 299.07 |
| 21 | 2448249 | 1990-12-23 | 299.35 |
| 22 | 2448544 | 1991-10-14 | 299.08 |
| 23 | 2448836 | 1992-08-01 | 300.15 |
| 24 | 2449147 | 1993-06-08 | 301.35 |
| 25 | 2449445 | 1994-04-02 | 302.28 |
| 26 | 2449746 | 1995-01-28 | 303.64 |
| 27 | 2450055 | 1995-12-03 | 303.5 |
| 28 | 2450361 | 1996-10-04 | 303.5 |
| 29 | 2450664 | 1997-08-03 | 304.93 |
| 30 | 2450967 | 1998-06-02 | 304.93 |
| 31 | 2451265 | 1999-03-27 | 303.71 |
| 32 | 2451576 | 2000-02-01 | 302.22 |
| 33 | 2451884 | 2000-12-05 | 301.65 |
| 34 | 2452186 | 2001-10-03 | 302.21 |
| 35 | 2452482 | 2002-07-26 | 301.78 |
| 36 | 2452774 | 2003-05-14 | 300.35 |
| 37 | 2453080 | 2004-03-15 | 300.86 |
| 38 | 2453383 | 2005-01-12 | 302.5 |
| 39 | 2453683 | 2005-11-08 | 303.85 |
| 40 | 2453982 | 2006-09-03 | 304.5 |
| 41 | 2454300 | 2007-07-18 | 304.71 |
| 42 | 2454603 | 2008-05-16 | 305.58 |
| 43 | 2454907 | 2009-03-16 | 307.08 |
| 44 | 2455210 | 2010-01-13 | 307.57 |
| 45 | 2455519 | 2010-11-18 | 306.64 |
| 46 | 2455825 | 2011-09-20 | 306 |
| 47 | 2456139 | 2012-07-30 | 305.58 |
| 48 | 2456449 | 2013-06-05 | 304.5 |
| 49 | 2456747 | 2014-03-30 | 303.21 |
| 50 | 2457047 | 2015-01-24 | 302.07 |
| 51 | 2457348 | 2015-11-21 | 300.64 |
| 52 | 2457644 | 2016-09-12 | 300.36 |
| 53 | 2457945 | 2017-07-10 | 301.65 |
| 54 | 2458248 | 2018-05-09 | 302.43 |
| 55 | 2458549 | 2019-03-06 | 302.71 |
| 56 | 2458852 | 2020-01-03 | 303.27 |
| 57 | 2459165 | 2020-11-11 | 303.63 |
| 58 | 2459464 | 2021-09-06 | 304.42 |
| 59 | 2459766 | 2022-07-05 | 305.1 |
| 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. |