| E | O (JD) | O (dat) | Period |
| -58 | 2415530 | 1901-05-25 | 472.93 |
| -57 | 2415987 | 1902-08-25 | 472.77 |
| -56 | 2416480 | 1903-12-31 | 473.36 |
| -54 | 2417434 | 1906-08-11 | 473.2 |
| -53 | 2417904 | 1907-11-24 | 473.79 |
| -52 | 2418348 | 1909-02-10 | 473.03 |
| -50 | 2419310 | 1911-09-30 | 471.98 |
| -47 | 2420738 | 1915-08-28 | 470.58 |
| -46 | 2421204 | 1916-12-06 | 469.7 |
| -45 | 2421696 | 1918-04-12 | 469.44 |
| -44 | 2422132 | 1919-06-22 | 468.1 |
| -43 | 2422583 | 1920-09-15 | 464.33 |
| -42 | 2423058 | 1922-01-03 | 460.75 |
| -41 | 2423526 | 1923-04-16 | 459.39 |
| -40 | 2423999 | 1924-08-01 | 458.19 |
| -39 | 2424435 | 1925-10-11 | 460.42 |
| -38 | 2424890 | 1927-01-09 | 460.47 |
| -37 | 2425347 | 1928-04-10 | 461.03 |
| -36 | 2425806 | 1929-07-13 | 462.82 |
| -35 | 2426264 | 1930-10-14 | 464.71 |
| -34 | 2426761 | 1932-02-23 | 468.25 |
| -33 | 2427203 | 1933-05-10 | 470.25 |
| -32 | 2427687 | 1934-09-06 | 472.67 |
| -31 | 2428165 | 1935-12-28 | 474.98 |
| -30 | 2428627 | 1937-04-03 | 476.7 |
| -29 | 2429116 | 1938-08-05 | 476.18 |
| -28 | 2429582 | 1939-11-14 | 477.9 |
| -27 | 2430075 | 1941-03-21 | 477.71 |
| -26 | 2430561 | 1942-07-20 | 475.82 |
| -25 | 2431040 | 1943-11-11 | 474.93 |
| -23 | 2431966 | 1946-05-25 | 473.52 |
| -22 | 2432466 | 1947-10-07 | 472.07 |
| -21 | 2432936 | 1949-01-19 | 468.95 |
| -20 | 2433364 | 1950-03-23 | 466.62 |
| -19 | 2433854 | 1951-07-26 | 464.72 |
| -18 | 2434328 | 1952-11-11 | 463.03 |
| -17 | 2434786 | 1954-02-12 | 461.4 |
| -16 | 2435226 | 1955-04-28 | 461.3 |
| -15 | 2435693 | 1956-08-07 | 462.85 |
| -14 | 2436155 | 1957-11-12 | 461.73 |
| -13 | 2436616 | 1959-02-16 | 463.44 |
| -12 | 2437083 | 1960-05-28 | 464.55 |
| -11 | 2437540 | 1961-08-28 | 465.35 |
| -10 | 2438027 | 1962-12-28 | 466.79 |
| -9 | 2438473 | 1964-03-18 | 467.46 |
| -8 | 2438969 | 1965-07-27 | 468 |
| -7 | 2439410 | 1966-10-11 | 467.96 |
| -6 | 2439870 | 1968-01-14 | 469.26 |
| -5 | 2440373 | 1969-05-31 | 469.85 |
| -4 | 2440825 | 1970-08-26 | 469.94 |
| -3 | 2441294 | 1971-12-08 | 470.78 |
| -2 | 2441756 | 1973-03-14 | 472.5 |
| -1 | 2442253 | 1974-07-24 | 472.7 |
| 0 | 2442723 | 1975-11-06 | 472.37 |
| 1 | 2443164 | 1977-01-20 | 473.35 |
| 2 | 2443673 | 1978-06-13 | 473.23 |
| 3 | 2444137 | 1979-09-20 | 472.63 |
| 4 | 2444608 | 1981-01-03 | 471.43 |
| 5 | 2445084 | 1982-04-24 | 471.77 |
| 6 | 2445552 | 1983-08-05 | 471.64 |
| 7 | 2446021 | 1984-11-16 | 469.83 |
| 8 | 2446487 | 1986-02-25 | 469.03 |
| 9 | 2446958 | 1987-06-11 | 468.62 |
| 10 | 2447436 | 1988-10-01 | 469.37 |
| 11 | 2447898 | 1990-01-06 | 469.55 |
| 12 | 2448367 | 1991-04-20 | 469.86 |
| 13 | 2448819 | 1992-07-15 | 469.96 |
| 14 | 2449300 | 1993-11-08 | 469.98 |
| 15 | 2449793 | 1995-03-16 | 470.77 |
| 16 | 2450246 | 1996-06-11 | 471.63 |
| 17 | 2450720 | 1997-09-28 | 472.02 |
| 18 | 2451186 | 1999-01-07 | 471.85 |
| 19 | 2451658 | 2000-04-23 | 470.94 |
| 20 | 2452144 | 2001-08-22 | 470.25 |
| 21 | 2452609 | 2002-11-30 | 470.6 |
| 22 | 2453079 | 2004-03-14 | 470.14 |
| 23 | 2453540 | 2005-06-18 | 470.07 |
| 24 | 2454016 | 2006-10-07 | 470.1 |
| 25 | 2454483 | 2008-01-17 | 469.94 |
| 26 | 2454951 | 2009-04-29 | 469.89 |
| 27 | 2455421 | 2010-08-12 | 470.09 |
| 28 | 2455896 | 2011-11-30 | 470.92 |
| 29 | 2456374 | 2013-03-22 | 470.63 |
| 30 | 2456841 | 2014-07-02 | 470.38 |
| 31 | 2457297 | 2015-10-01 | 470.38 |
| 32 | 2457775 | 2017-01-21 | 470.16 |
| 33 | 2458258 | 2018-05-19 | 469.73 |
| 34 | 2458716 | 2019-08-20 | 469.46 |
| 35 | 2459181 | 2020-11-27 | 470.11 |
| 36 | 2459659 | 2022-03-20 | 471.03 |
| 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. |