| E | O (JD) | O (dat) | Period |
| -64 | 2413892 | 1896-11-28 | 486.4 |
| -63 | 2414372 | 1898-03-23 | 484.34 |
| -62 | 2414842 | 1899-07-06 | 480.08 |
| -61 | 2415358 | 1900-12-04 | 477.3 |
| -60 | 2415832 | 1902-03-23 | 479.43 |
| -59 | 2416306 | 1903-07-10 | 479.64 |
| -58 | 2416773 | 1904-10-19 | 475.99 |
| -57 | 2417231 | 1906-01-20 | 475.64 |
| -56 | 2417745 | 1907-06-18 | 477 |
| -55 | 2418184 | 1908-08-30 | 476.57 |
| -54 | 2418680 | 1910-01-08 | 477.86 |
| -53 | 2419169 | 1911-05-12 | 477.57 |
| -52 | 2419647 | 1912-09-01 | 478.93 |
| -51 | 2420104 | 1913-12-02 | 481.36 |
| -50 | 2420590 | 1915-04-02 | 480.22 |
| -49 | 2421072 | 1916-07-27 | 481.07 |
| -48 | 2421562 | 1917-11-29 | 483.14 |
| -47 | 2422041 | 1919-03-23 | 484.36 |
| -46 | 2422531 | 1920-07-25 | 485.72 |
| -45 | 2423020 | 1921-11-26 | 487.14 |
| -44 | 2423495 | 1923-03-16 | 488.72 |
| -43 | 2423980 | 1924-07-13 | 490.43 |
| -42 | 2424482 | 1925-11-27 | 490.14 |
| -41 | 2424972 | 1927-04-01 | 491.85 |
| -40 | 2425473 | 1928-08-14 | 494.36 |
| -39 | 2425965 | 1929-12-19 | 494.49 |
| -38 | 2426448 | 1931-04-16 | 493.78 |
| -37 | 2426953 | 1932-09-02 | 492.64 |
| -36 | 2427443 | 1934-01-05 | 491.72 |
| -35 | 2427942 | 1935-05-19 | 491.22 |
| -34 | 2428425 | 1936-09-13 | 489.64 |
| -33 | 2428917 | 1938-01-18 | 487.07 |
| -32 | 2429405 | 1939-05-21 | 484.36 |
| -31 | 2429885 | 1940-09-12 | 483 |
| -30 | 2430371 | 1942-01-11 | 483.07 |
| -29 | 2430844 | 1943-04-29 | 481.64 |
| -28 | 2431322 | 1944-08-19 | 480.78 |
| -27 | 2431807 | 1945-12-17 | 481 |
| -26 | 2432298 | 1947-04-22 | 481.79 |
| -25 | 2432767 | 1948-08-03 | 484.07 |
| -24 | 2433254 | 1949-12-03 | 485.22 |
| -23 | 2433736 | 1951-03-30 | 485.14 |
| -22 | 2434224 | 1952-07-30 | 486.57 |
| -21 | 2434719 | 1953-12-07 | 487.72 |
| -20 | 2435203 | 1955-04-05 | 487.36 |
| -19 | 2435694 | 1956-08-08 | 488.22 |
| -18 | 2436183 | 1957-12-10 | 488.86 |
| -17 | 2436666 | 1959-04-07 | 489.36 |
| -16 | 2437147 | 1960-07-31 | 490.14 |
| -15 | 2437648 | 1961-12-14 | 490.07 |
| -14 | 2438139 | 1963-04-19 | 490.64 |
| -13 | 2438634 | 1964-08-26 | 491 |
| -12 | 2439125 | 1965-12-30 | 489.49 |
| -11 | 2439613 | 1967-05-02 | 487.28 |
| -10 | 2440105 | 1968-09-05 | 485.64 |
| -9 | 2440582 | 1969-12-26 | 483.71 |
| -8 | 2441066 | 1971-04-24 | 482.21 |
| -7 | 2441543 | 1972-08-13 | 479.79 |
| -6 | 2442029 | 1973-12-12 | 478.36 |
| -5 | 2442502 | 1975-03-30 | 478.64 |
| -4 | 2442987 | 1976-07-27 | 478.93 |
| -3 | 2443448 | 1977-10-31 | 479.29 |
| -2 | 2443936 | 1979-03-03 | 479.86 |
| -1 | 2444413 | 1980-06-22 | 480.5 |
| 0 | 2444901 | 1981-10-23 | 481.72 |
| 1 | 2445381 | 1983-02-15 | 484.22 |
| 2 | 2445868 | 1984-06-16 | 486.36 |
| 3 | 2446348 | 1985-10-09 | 488 |
| 4 | 2446831 | 1987-02-04 | 489.79 |
| 5 | 2447332 | 1988-06-19 | 491.93 |
| 6 | 2447826 | 1989-10-26 | 494.22 |
| 7 | 2448320 | 1991-03-04 | 496.57 |
| 8 | 2448819 | 1992-07-15 | 496.92 |
| 9 | 2449317 | 1993-11-25 | 496.71 |
| 10 | 2449818 | 1995-04-10 | 496.36 |
| 11 | 2450313 | 1996-08-17 | 495.21 |
| 12 | 2450807 | 1997-12-24 | 494.21 |
| 13 | 2451305 | 1999-05-06 | 492.86 |
| 14 | 2451790 | 2000-09-02 | 490.86 |
| 15 | 2452282 | 2002-01-07 | 488.86 |
| 16 | 2452773 | 2003-05-13 | 486.5 |
| 17 | 2453262 | 2004-09-13 | 485.14 |
| 18 | 2453741 | 2006-01-05 | 484.14 |
| 19 | 2454223 | 2007-05-02 | 480.86 |
| 20 | 2454700 | 2008-08-21 | 477.93 |
| 21 | 2455187 | 2009-12-21 | 475.36 |
| 22 | 2455663 | 2011-04-11 | 473.93 |
| 23 | 2456124 | 2012-07-15 | 474 |
| 24 | 2456602 | 2013-11-05 | 472.79 |
| 25 | 2457056 | 2015-02-02 | 472.72 |
| 26 | 2457543 | 2016-06-03 | 474.22 |
| 27 | 2458016 | 2017-09-19 | 475.5 |
| 28 | 2458490 | 2019-01-06 | 477.33 |
| 29 | 2458978 | 2020-05-08 | 478.26 |
| 30 | 2459448 | 2021-08-21 | 477.75 |
| 31 | 2459935 | 2022-12-21 | 478.7 |
| 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. |