| E | O (JD) | O (dat) | Period |
| -76 | 2411734 | 1891-01-01 | 377.08 |
| -71 | 2413596 | 1896-02-06 | 377.92 |
| -70 | 2414000 | 1897-03-16 | 377.67 |
| -65 | 2415860 | 1902-04-20 | 377.51 |
| -64 | 2416240 | 1903-05-05 | 377.46 |
| -59 | 2418150 | 1908-07-27 | 377.61 |
| -57 | 2418915 | 1910-08-31 | 377.74 |
| -54 | 2420025 | 1913-09-14 | 377.42 |
| -53 | 2420400 | 1914-09-24 | 377.92 |
| -52 | 2420780 | 1915-10-09 | 377.02 |
| -51 | 2421171 | 1916-11-03 | 375.25 |
| -50 | 2421525 | 1917-10-23 | 374.46 |
| -49 | 2421915 | 1918-11-17 | 374.2 |
| -47 | 2422670 | 1920-12-11 | 373.55 |
| -46 | 2423030 | 1921-12-06 | 372.43 |
| -45 | 2423399 | 1922-12-10 | 371.91 |
| -44 | 2423770 | 1923-12-16 | 371.86 |
| -43 | 2424140 | 1924-12-20 | 370.73 |
| -42 | 2424518 | 1926-01-02 | 371.14 |
| -41 | 2424880 | 1926-12-30 | 372.25 |
| -40 | 2425262 | 1928-01-16 | 372.74 |
| -39 | 2425626 | 1929-01-14 | 373.11 |
| -38 | 2425995 | 1930-01-18 | 373.21 |
| -37 | 2426382 | 1931-02-09 | 373.14 |
| -36 | 2426755 | 1932-02-17 | 373.4 |
| -35 | 2427126 | 1933-02-22 | 373.39 |
| -34 | 2427500 | 1934-03-03 | 373.68 |
| -33 | 2427869 | 1935-03-07 | 373.53 |
| -32 | 2428241 | 1936-03-13 | 373.02 |
| -31 | 2428615 | 1937-03-22 | 373.29 |
| -30 | 2428994 | 1938-04-05 | 373.55 |
| -29 | 2429365 | 1939-04-11 | 374.4 |
| -28 | 2429739 | 1940-04-19 | 375.76 |
| -27 | 2430111 | 1941-04-26 | 376.11 |
| -26 | 2430487 | 1942-05-07 | 376.03 |
| -25 | 2430860 | 1943-05-15 | 377.1 |
| -24 | 2431249 | 1944-06-07 | 378.39 |
| -23 | 2431636 | 1945-06-29 | 379.81 |
| -22 | 2431998 | 1946-06-26 | 381.54 |
| -21 | 2432368 | 1947-07-01 | 381.97 |
| -20 | 2432770 | 1948-08-06 | 382.32 |
| -19 | 2433151 | 1949-08-22 | 382.02 |
| -18 | 2433540 | 1950-09-15 | 382.55 |
| -17 | 2433933 | 1951-10-13 | 383.23 |
| -16 | 2434297 | 1952-10-11 | 383.14 |
| -15 | 2434681 | 1953-10-30 | 382.25 |
| -14 | 2435058 | 1954-11-11 | 382.54 |
| -13 | 2435449 | 1955-12-07 | 382.82 |
| -12 | 2435828 | 1956-12-20 | 383.13 |
| -11 | 2436215 | 1958-01-11 | 383.69 |
| -10 | 2436597 | 1959-01-28 | 383.08 |
| -9 | 2436986 | 1960-02-21 | 381.96 |
| -8 | 2437372 | 1961-03-13 | 380.27 |
| -7 | 2437750 | 1962-03-26 | 379.13 |
| -6 | 2438126 | 1963-04-06 | 376.52 |
| -5 | 2438502 | 1964-04-16 | 374.44 |
| -4 | 2438871 | 1965-04-20 | 372.66 |
| -3 | 2439244 | 1966-04-28 | 371.74 |
| -2 | 2439624 | 1967-05-13 | 371.51 |
| -1 | 2439972 | 1968-04-25 | 370.65 |
| 0 | 2440348 | 1969-05-06 | 370.22 |
| 1 | 2440723 | 1970-05-16 | 370.02 |
| 2 | 2441100 | 1971-05-28 | 370.14 |
| 3 | 2441475 | 1972-06-06 | 370.39 |
| 4 | 2441828 | 1973-05-25 | 371.18 |
| 5 | 2442202 | 1974-06-03 | 371.35 |
| 6 | 2442571 | 1975-06-07 | 371.74 |
| 7 | 2442949 | 1976-06-19 | 372.14 |
| 8 | 2443320 | 1977-06-25 | 373.15 |
| 9 | 2443691 | 1978-07-01 | 374.56 |
| 10 | 2444073 | 1979-07-18 | 374.55 |
| 11 | 2444447 | 1980-07-26 | 375.09 |
| 12 | 2444817 | 1981-07-31 | 375.27 |
| 13 | 2445197 | 1982-08-15 | 375.99 |
| 14 | 2445575 | 1983-08-28 | 376.54 |
| 15 | 2445940 | 1984-08-27 | 376.62 |
| 16 | 2446326 | 1985-09-17 | 376.91 |
| 17 | 2446700 | 1986-09-26 | 377.4 |
| 18 | 2447084 | 1987-10-15 | 378.06 |
| 19 | 2447462 | 1988-10-27 | 378.32 |
| 20 | 2447835 | 1989-11-04 | 377.98 |
| 21 | 2448210 | 1990-11-14 | 377.61 |
| 22 | 2448593 | 1991-12-02 | 377.54 |
| 23 | 2448982 | 1992-12-25 | 377.15 |
| 24 | 2449350 | 1993-12-28 | 376.86 |
| 25 | 2449714 | 1994-12-27 | 376.63 |
| 26 | 2450103 | 1996-01-20 | 376.19 |
| 27 | 2450479 | 1997-01-30 | 375.82 |
| 28 | 2450854 | 1998-02-09 | 375.85 |
| 29 | 2451226 | 1999-02-16 | 376.8 |
| 30 | 2451602 | 2000-02-27 | 376.66 |
| 31 | 2451978 | 2001-03-09 | 376.28 |
| 32 | 2452358 | 2002-03-24 | 376.43 |
| 33 | 2452737 | 2003-04-07 | 375.97 |
| 34 | 2453119 | 2004-04-23 | 375.39 |
| 35 | 2453481 | 2005-04-20 | 374.36 |
| 36 | 2453865 | 2006-05-09 | 373.55 |
| 37 | 2454240 | 2007-05-19 | 372.77 |
| 38 | 2454603 | 2008-05-16 | 372.49 |
| 39 | 2454975 | 2009-05-23 | 372.54 |
| 40 | 2455343 | 2010-05-26 | 373.47 |
| 41 | 2455720 | 2011-06-07 | 373.56 |
| 42 | 2456093 | 2012-06-14 | 374.22 |
| 43 | 2456471 | 2013-06-27 | 374.53 |
| 44 | 2456846 | 2014-07-07 | 374.57 |
| 45 | 2457229 | 2015-07-25 | 374.62 |
| 46 | 2457598 | 2016-07-28 | 374.32 |
| 47 | 2457973 | 2017-08-07 | 374.2 |
| 48 | 2458337 | 2018-08-06 | 373.87 |
| 49 | 2458715 | 2019-08-19 | 373.6 |
| 50 | 2459091 | 2020-08-29 | 373.23 |
| 51 | 2459465 | 2021-09-07 | 373.82 |
| 52 | 2459841 | 2022-09-18 | 374.29 |
| 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. |