| E | O (JD) | O (dat) | Period |
| -87 | 2414180 | 1897-09-12 | 402.4 |
| -86 | 2414592 | 1898-10-29 | 400.61 |
| -85 | 2414995 | 1899-12-06 | 400.56 |
| -84 | 2415399 | 1901-01-14 | 399.17 |
| -83 | 2415807 | 1902-02-26 | 398.23 |
| -82 | 2416187 | 1903-03-13 | 396.53 |
| -81 | 2416585 | 1904-04-14 | 394.73 |
| -80 | 2416994 | 1905-05-28 | 394.32 |
| -79 | 2417374 | 1906-06-12 | 393.96 |
| -78 | 2417769 | 1907-07-12 | 394.01 |
| -77 | 2418141 | 1908-07-18 | 394.62 |
| -76 | 2418549 | 1909-08-30 | 394.68 |
| -75 | 2418959 | 1910-10-14 | 395.65 |
| -74 | 2419350 | 1911-11-09 | 396.83 |
| -73 | 2419745 | 1912-12-08 | 397.69 |
| -72 | 2420137 | 1914-01-04 | 398.97 |
| -71 | 2420535 | 1915-02-06 | 398.75 |
| -70 | 2420947 | 1916-03-24 | 398.87 |
| -69 | 2421333 | 1917-04-14 | 399.44 |
| -68 | 2421738 | 1918-05-24 | 399.49 |
| -67 | 2422146 | 1919-07-06 | 399.22 |
| -66 | 2422542 | 1920-08-05 | 398.77 |
| -65 | 2422940 | 1921-09-07 | 398.39 |
| -64 | 2423336 | 1922-10-08 | 398.44 |
| -63 | 2423731 | 1923-11-07 | 398.02 |
| -62 | 2424126 | 1924-12-06 | 397.8 |
| -61 | 2424528 | 1926-01-12 | 397.52 |
| -60 | 2424930 | 1927-02-18 | 397.35 |
| -59 | 2425324 | 1928-03-18 | 397.34 |
| -58 | 2425726 | 1929-04-24 | 397.03 |
| -57 | 2426123 | 1930-05-26 | 396.5 |
| -56 | 2426509 | 1931-06-16 | 395.45 |
| -55 | 2426909 | 1932-07-20 | 395.27 |
| -54 | 2427308 | 1933-08-23 | 395.38 |
| -53 | 2427700 | 1934-09-19 | 395.48 |
| -52 | 2428094 | 1935-10-18 | 395.84 |
| -51 | 2428481 | 1936-11-08 | 395.51 |
| -50 | 2428889 | 1937-12-21 | 395.56 |
| -49 | 2429285 | 1939-01-21 | 396.35 |
| -48 | 2429683 | 1940-02-23 | 397.23 |
| -47 | 2430078 | 1941-03-24 | 397.62 |
| -46 | 2430457 | 1942-04-07 | 397.85 |
| -45 | 2430869 | 1943-05-24 | 397.66 |
| -44 | 2431277 | 1944-07-05 | 397.89 |
| -43 | 2431674 | 1945-08-06 | 398.13 |
| -42 | 2432066 | 1946-09-02 | 398.64 |
| -41 | 2432463 | 1947-10-04 | 398.25 |
| -40 | 2432863 | 1948-11-07 | 397.59 |
| -39 | 2433259 | 1949-12-08 | 397.92 |
| -38 | 2433658 | 1951-01-11 | 398.02 |
| -37 | 2434061 | 1952-02-18 | 397.65 |
| -36 | 2434443 | 1953-03-06 | 397.07 |
| -35 | 2434855 | 1954-04-22 | 396.35 |
| -34 | 2435262 | 1955-06-03 | 395.3 |
| -33 | 2435646 | 1956-06-21 | 394.63 |
| -32 | 2436033 | 1957-07-13 | 393.94 |
| -31 | 2436430 | 1958-08-14 | 393.65 |
| -30 | 2436823 | 1959-09-11 | 392.4 |
| -29 | 2437208 | 1960-09-30 | 392.22 |
| -28 | 2437610 | 1961-11-06 | 393.25 |
| -27 | 2438001 | 1962-12-02 | 393.08 |
| -26 | 2438395 | 1963-12-31 | 393.14 |
| -25 | 2438782 | 1965-01-21 | 393.22 |
| -24 | 2439179 | 1966-02-22 | 392.76 |
| -23 | 2439582 | 1967-04-01 | 392.58 |
| -22 | 2439959 | 1968-04-12 | 392.55 |
| -21 | 2440362 | 1969-05-20 | 392.78 |
| -20 | 2440752 | 1970-06-14 | 393.24 |
| -19 | 2441133 | 1971-06-30 | 393.27 |
| -18 | 2441539 | 1972-08-09 | 393.53 |
| -17 | 2441926 | 1973-08-31 | 394.71 |
| -16 | 2442326 | 1974-10-05 | 395.17 |
| -15 | 2442723 | 1975-11-06 | 396.55 |
| -14 | 2443115 | 1976-12-02 | 397.56 |
| -13 | 2443510 | 1978-01-01 | 396.39 |
| -12 | 2443913 | 1979-02-08 | 396.3 |
| -11 | 2444311 | 1980-03-12 | 395.85 |
| -10 | 2444718 | 1981-04-23 | 395.6 |
| -9 | 2445113 | 1982-05-23 | 394.62 |
| -8 | 2445480 | 1983-05-25 | 394.12 |
| -7 | 2445886 | 1984-07-04 | 393.63 |
| -6 | 2446283 | 1985-08-05 | 393.71 |
| -5 | 2446679 | 1986-09-05 | 394.17 |
| -4 | 2447057 | 1987-09-18 | 395.58 |
| -3 | 2447464 | 1988-10-29 | 396.6 |
| -2 | 2447860 | 1989-11-29 | 396.1 |
| -1 | 2448259 | 1991-01-02 | 396.02 |
| 0 | 2448659 | 1992-02-06 | 395.84 |
| 1 | 2449061 | 1993-03-14 | 395.96 |
| 2 | 2449447 | 1994-04-04 | 395.29 |
| 3 | 2449840 | 1995-05-02 | 395.13 |
| 4 | 2450234 | 1996-05-30 | 395.7 |
| 5 | 2450625 | 1997-06-25 | 396.16 |
| 6 | 2451025 | 1998-07-30 | 396.95 |
| 7 | 2451423 | 1999-09-01 | 398.38 |
| 8 | 2451819 | 2000-10-01 | 399.85 |
| 9 | 2452231 | 2001-11-17 | 400.31 |
| 10 | 2452624 | 2002-12-15 | 400.4 |
| 11 | 2453024 | 2004-01-19 | 400.12 |
| 12 | 2453429 | 2005-02-27 | 400.24 |
| 13 | 2453840 | 2006-04-14 | 400.35 |
| 14 | 2454225 | 2007-05-04 | 399.15 |
| 15 | 2454621 | 2008-06-03 | 398.47 |
| 16 | 2455021 | 2009-07-08 | 397.87 |
| 17 | 2455429 | 2010-08-20 | 397.22 |
| 18 | 2455832 | 2011-09-27 | 396.55 |
| 19 | 2456210 | 2012-10-09 | 397 |
| 20 | 2456605 | 2013-11-08 | 396.67 |
| 21 | 2457010 | 2014-12-18 | 396.68 |
| 22 | 2457406 | 2016-01-18 | 396.7 |
| 23 | 2457796 | 2017-02-11 | 397.11 |
| 24 | 2458201 | 2018-03-23 | 398.04 |
| 25 | 2458594 | 2019-04-20 | 398.07 |
| 26 | 2459000 | 2020-05-30 | 397.8 |
| 27 | 2459396 | 2021-06-30 | 398.25 |
| 28 | 2459790 | 2022-07-29 | 398.89 |
| 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. |