| E | O (JD) | O (dat) | Period |
| -73 | 2411580 | 1890-07-31 | 398.99 |
| -65 | 2414782 | 1899-05-07 | 399.04 |
| -64 | 2415170 | 1900-05-30 | 398.46 |
| -63 | 2415569 | 1901-07-03 | 397.39 |
| -62 | 2415968 | 1902-08-06 | 396.44 |
| -61 | 2416370 | 1903-09-12 | 396.69 |
| -60 | 2416770 | 1904-10-16 | 395.45 |
| -59 | 2417150 | 1905-10-31 | 395.94 |
| -58 | 2417526 | 1906-11-11 | 396.21 |
| -56 | 2418316 | 1909-01-09 | 396.24 |
| -54 | 2419140 | 1911-04-13 | 395.86 |
| -53 | 2419535 | 1912-05-12 | 395.56 |
| -52 | 2419930 | 1913-06-11 | 395.51 |
| -51 | 2420330 | 1914-07-16 | 394.95 |
| -50 | 2420718 | 1915-08-08 | 393.79 |
| -49 | 2421098 | 1916-08-22 | 392.88 |
| -48 | 2421485 | 1917-09-13 | 393.3 |
| -47 | 2421876 | 1918-10-09 | 393.12 |
| -44 | 2423065 | 1922-01-10 | 393.27 |
| -43 | 2423466 | 1923-02-15 | 394.12 |
| -42 | 2423867 | 1924-03-22 | 394.91 |
| -41 | 2424260 | 1925-04-19 | 395.28 |
| -40 | 2424636 | 1926-04-30 | 395.19 |
| -39 | 2425035 | 1927-06-03 | 394.54 |
| -38 | 2425439 | 1928-07-11 | 395.25 |
| -37 | 2425834 | 1929-08-10 | 396.15 |
| -36 | 2426230 | 1930-09-10 | 397.89 |
| -35 | 2426622 | 1931-10-07 | 398.87 |
| -34 | 2427012 | 1932-10-31 | 397.9 |
| -33 | 2427431 | 1933-12-24 | 396.44 |
| -32 | 2427827 | 1935-01-24 | 395.35 |
| -30 | 2428632 | 1937-04-08 | 394.67 |
| -29 | 2429022 | 1938-05-03 | 394.42 |
| -28 | 2429397 | 1939-05-13 | 393.4 |
| -27 | 2429777 | 1940-05-27 | 391.92 |
| -26 | 2430169 | 1941-06-23 | 392.13 |
| -25 | 2430572 | 1942-07-31 | 392.53 |
| -24 | 2430977 | 1943-09-09 | 394.5 |
| -23 | 2431358 | 1944-09-24 | 396.69 |
| -22 | 2431750 | 1945-10-21 | 398.26 |
| -21 | 2432158 | 1946-12-03 | 398.36 |
| -20 | 2432553 | 1948-01-02 | 398.01 |
| -19 | 2432958 | 1949-02-10 | 397.92 |
| -18 | 2433360 | 1950-03-19 | 398.8 |
| -17 | 2433764 | 1951-04-27 | 398.35 |
| -16 | 2434149 | 1952-05-16 | 397.39 |
| -15 | 2434543 | 1953-06-14 | 396.76 |
| -14 | 2434940 | 1954-07-16 | 396.03 |
| -13 | 2435349 | 1955-08-29 | 395.25 |
| -12 | 2435737 | 1956-09-20 | 394.54 |
| -11 | 2436131 | 1957-10-19 | 394.46 |
| -10 | 2436525 | 1958-11-17 | 393.88 |
| -9 | 2436922 | 1959-12-19 | 393.16 |
| -8 | 2437309 | 1961-01-09 | 392.63 |
| -7 | 2437698 | 1962-02-02 | 392.63 |
| -6 | 2438095 | 1963-03-06 | 392.3 |
| -5 | 2438488 | 1964-04-02 | 392.45 |
| -4 | 2438880 | 1965-04-29 | 392.8 |
| -3 | 2439275 | 1966-05-29 | 393.12 |
| -2 | 2439663 | 1967-06-21 | 393.26 |
| -1 | 2440053 | 1968-07-15 | 393.64 |
| 0 | 2440454 | 1969-08-20 | 394.14 |
| 1 | 2440850 | 1970-09-20 | 394.53 |
| 2 | 2441238 | 1971-10-13 | 395.21 |
| 3 | 2441633 | 1972-11-11 | 395.75 |
| 4 | 2442036 | 1973-12-19 | 395.46 |
| 5 | 2442430 | 1975-01-17 | 393.64 |
| 6 | 2442823 | 1976-02-14 | 391.49 |
| 7 | 2443226 | 1977-03-23 | 390.08 |
| 8 | 2443618 | 1978-04-19 | 388.72 |
| 9 | 2444003 | 1979-05-09 | 387.14 |
| 10 | 2444369 | 1980-05-09 | 386.31 |
| 11 | 2444744 | 1981-05-19 | 386.64 |
| 12 | 2445143 | 1982-06-22 | 387.67 |
| 13 | 2445537 | 1983-07-21 | 389.8 |
| 14 | 2445918 | 1984-08-05 | 392.27 |
| 15 | 2446308 | 1985-08-30 | 395.14 |
| 16 | 2446715 | 1986-10-11 | 396.31 |
| 17 | 2447116 | 1987-11-16 | 396.28 |
| 18 | 2447515 | 1988-12-19 | 396.27 |
| 19 | 2447910 | 1990-01-18 | 397.13 |
| 20 | 2448315 | 1991-02-27 | 396.05 |
| 21 | 2448701 | 1992-03-19 | 394.83 |
| 22 | 2449091 | 1993-04-13 | 393.23 |
| 23 | 2449482 | 1994-05-09 | 392.62 |
| 24 | 2449896 | 1995-06-27 | 392.16 |
| 25 | 2450268 | 1996-07-03 | 391.4 |
| 26 | 2450667 | 1997-08-06 | 391.88 |
| 27 | 2451042 | 1998-08-16 | 392.99 |
| 28 | 2451448 | 1999-09-26 | 393.43 |
| 29 | 2451839 | 2000-10-21 | 393.25 |
| 30 | 2452223 | 2001-11-09 | 394.76 |
| 31 | 2452627 | 2002-12-18 | 395.99 |
| 32 | 2453040 | 2004-02-04 | 397.27 |
| 33 | 2453425 | 2005-02-23 | 397.21 |
| 34 | 2453809 | 2006-03-14 | 397.53 |
| 35 | 2454215 | 2007-04-24 | 398.01 |
| 36 | 2454626 | 2008-06-08 | 397.05 |
| 37 | 2455020 | 2009-07-07 | 396.65 |
| 38 | 2455411 | 2010-08-02 | 396.98 |
| 39 | 2455806 | 2011-09-01 | 396.58 |
| 40 | 2456212 | 2012-10-11 | 395.38 |
| 41 | 2456594 | 2013-10-28 | 394.64 |
| 42 | 2456996 | 2014-12-04 | 394.44 |
| 43 | 2457390 | 2016-01-02 | 394.14 |
| 44 | 2457782 | 2017-01-28 | 393.77 |
| 45 | 2458175 | 2018-02-25 | 393.38 |
| 46 | 2458571 | 2019-03-28 | 393.7 |
| 47 | 2458961 | 2020-04-21 | 393.08 |
| 48 | 2459353 | 2021-05-18 | 393.04 |
| 49 | 2459749 | 2022-06-18 | 393.11 |
| 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. |