| E | O (JD) | O (dat) | Period |
| -77 | 2412025 | 1891-10-19 | 390.31 |
| -74 | 2413175 | 1894-12-12 | 389.44 |
| -68 | 2415545 | 1901-06-09 | 389.34 |
| -67 | 2415930 | 1902-06-29 | 389.87 |
| -66 | 2416310 | 1903-07-14 | 389.38 |
| -65 | 2416691 | 1904-07-29 | 389.16 |
| -64 | 2417066 | 1905-08-08 | 389.73 |
| -63 | 2417471 | 1906-09-17 | 387.95 |
| -62 | 2417883 | 1907-11-03 | 388.65 |
| -61 | 2418237 | 1908-10-22 | 389.06 |
| -60 | 2418632 | 1909-11-21 | 387.98 |
| -59 | 2419046 | 1911-01-09 | 388.56 |
| -58 | 2419412 | 1912-01-10 | 388.37 |
| -57 | 2419806 | 1913-02-07 | 389.35 |
| -56 | 2420190 | 1914-02-26 | 390.84 |
| -55 | 2420553 | 1915-02-24 | 390.11 |
| -54 | 2420981 | 1916-04-27 | 389.17 |
| -53 | 2421372 | 1917-05-23 | 389.06 |
| -52 | 2421773 | 1918-06-28 | 388.09 |
| -51 | 2422150 | 1919-07-10 | 389.11 |
| -50 | 2422530 | 1920-07-24 | 389.71 |
| -49 | 2422910 | 1921-08-08 | 387.56 |
| -48 | 2423287 | 1922-08-20 | 387.94 |
| -47 | 2423677 | 1923-09-14 | 388.5 |
| -46 | 2424101 | 1924-11-11 | 389.26 |
| -45 | 2424490 | 1925-12-05 | 389.31 |
| -44 | 2424854 | 1926-12-04 | 389.25 |
| -43 | 2425256 | 1928-01-10 | 388.3 |
| -42 | 2425646 | 1929-02-03 | 387.62 |
| -41 | 2426024 | 1930-02-16 | 386.92 |
| -40 | 2426406 | 1931-03-05 | 387.77 |
| -39 | 2426799 | 1932-04-01 | 387.9 |
| -38 | 2427177 | 1933-04-14 | 386.85 |
| -37 | 2427584 | 1934-05-26 | 387.81 |
| -36 | 2427975 | 1935-06-21 | 388.44 |
| -35 | 2428360 | 1936-07-10 | 388.17 |
| -34 | 2428729 | 1937-07-14 | 387.91 |
| -33 | 2429114 | 1938-08-03 | 387.32 |
| -32 | 2429528 | 1939-09-21 | 386.83 |
| -31 | 2429907 | 1940-10-04 | 387.32 |
| -30 | 2430286 | 1941-10-18 | 388.81 |
| -29 | 2430680 | 1942-11-16 | 390.25 |
| -28 | 2431056 | 1943-11-27 | 390.76 |
| -27 | 2431456 | 1944-12-31 | 389.95 |
| -26 | 2431845 | 1946-01-24 | 389.56 |
| -25 | 2432250 | 1947-03-05 | 390.33 |
| -24 | 2432642 | 1948-03-31 | 390.45 |
| -23 | 2433035 | 1949-04-28 | 392.08 |
| -22 | 2433405 | 1950-05-03 | 391.63 |
| -21 | 2433776 | 1951-05-09 | 392.11 |
| -20 | 2434196 | 1952-07-02 | 392.48 |
| -19 | 2434585 | 1953-07-26 | 392.88 |
| -18 | 2435005 | 1954-09-19 | 393.51 |
| -17 | 2435373 | 1955-09-22 | 394.71 |
| -16 | 2435777 | 1956-10-30 | 394.01 |
| -15 | 2436172 | 1957-11-29 | 391.9 |
| -14 | 2436552 | 1958-12-14 | 391.08 |
| -13 | 2436947 | 1960-01-13 | 390.25 |
| -12 | 2437349 | 1961-02-18 | 391.05 |
| -11 | 2437726 | 1962-03-02 | 390.24 |
| -10 | 2438114 | 1963-03-25 | 390.01 |
| -9 | 2438506 | 1964-04-20 | 390.29 |
| -8 | 2438901 | 1965-05-20 | 390.76 |
| -7 | 2439296 | 1966-06-19 | 391.55 |
| -6 | 2439677 | 1967-07-05 | 393.17 |
| -5 | 2440066 | 1968-07-28 | 393.74 |
| -4 | 2440461 | 1969-08-27 | 393.66 |
| -3 | 2440867 | 1970-10-07 | 393.84 |
| -2 | 2441263 | 1971-11-07 | 392.63 |
| -1 | 2441662 | 1972-12-10 | 390.75 |
| 0 | 2442049 | 1974-01-01 | 388.05 |
| 1 | 2442434 | 1975-01-21 | 386.28 |
| 2 | 2442833 | 1976-02-24 | 384.9 |
| 3 | 2443194 | 1977-02-19 | 384.81 |
| 4 | 2443564 | 1978-02-24 | 385.55 |
| 5 | 2443942 | 1979-03-09 | 386.85 |
| 6 | 2444349 | 1980-04-19 | 388.64 |
| 7 | 2444740 | 1981-05-15 | 390.23 |
| 8 | 2445137 | 1982-06-16 | 392.36 |
| 9 | 2445534 | 1983-07-18 | 393.48 |
| 10 | 2445922 | 1984-08-09 | 393.02 |
| 11 | 2446320 | 1985-09-11 | 391.63 |
| 12 | 2446708 | 1986-10-04 | 390.39 |
| 13 | 2447096 | 1987-10-27 | 389.6 |
| 14 | 2447493 | 1988-11-27 | 389.05 |
| 15 | 2447874 | 1989-12-13 | 389.24 |
| 16 | 2448262 | 1991-01-05 | 388.83 |
| 17 | 2448641 | 1992-01-19 | 388.54 |
| 18 | 2449040 | 1993-02-21 | 389.15 |
| 19 | 2449429 | 1994-03-17 | 390.25 |
| 20 | 2449827 | 1995-04-19 | 391.28 |
| 21 | 2450207 | 1996-05-03 | 390.92 |
| 22 | 2450589 | 1997-05-20 | 391.41 |
| 23 | 2450997 | 1998-07-02 | 390.85 |
| 24 | 2451400 | 1999-08-09 | 391.02 |
| 25 | 2451783 | 2000-08-26 | 391.07 |
| 26 | 2452153 | 2001-08-31 | 392.35 |
| 27 | 2452562 | 2002-10-14 | 392.25 |
| 28 | 2452944 | 2003-10-31 | 392.55 |
| 29 | 2453342 | 2004-12-02 | 393.38 |
| 30 | 2453733 | 2005-12-28 | 394.14 |
| 31 | 2454143 | 2007-02-11 | 393.84 |
| 32 | 2454520 | 2008-02-23 | 392.45 |
| 33 | 2454933 | 2009-04-11 | 391.83 |
| 34 | 2455324 | 2010-05-07 | 391.02 |
| 35 | 2455704 | 2011-05-22 | 390.53 |
| 36 | 2456082 | 2012-06-03 | 389.02 |
| 37 | 2456474 | 2013-06-30 | 388.89 |
| 38 | 2456864 | 2014-07-25 | 387.6 |
| 39 | 2457262 | 2015-08-27 | 387.65 |
| 40 | 2457655 | 2016-09-23 | 387.81 |
| 41 | 2458026 | 2017-09-29 | 387.9 |
| 42 | 2458423 | 2018-10-31 | 387.25 |
| 43 | 2458801 | 2019-11-13 | 386.48 |
| 44 | 2459191 | 2020-12-07 | 385.32 |
| 45 | 2459576 | 2021-12-27 | 385.09 |
| 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. |