| E | O (JD) | O (dat) | Period |
| -54 | 2417331 | 1906-04-30 | 464.96 |
| -53 | 2417803 | 1907-08-15 | 465.93 |
| -52 | 2418280 | 1908-12-04 | 466.93 |
| -48 | 2420152 | 1914-01-19 | 466.3 |
| -45 | 2421530 | 1917-10-28 | 466.19 |
| -44 | 2422009 | 1919-02-19 | 465.65 |
| -42 | 2422940 | 1921-09-07 | 464.35 |
| -41 | 2423390 | 1922-12-01 | 464.5 |
| -40 | 2423865 | 1924-03-20 | 466.44 |
| -39 | 2424325 | 1925-06-23 | 467.07 |
| -38 | 2424787 | 1926-09-28 | 467.58 |
| -37 | 2425256 | 1928-01-10 | 468.07 |
| -36 | 2425746 | 1929-05-14 | 468.28 |
| -35 | 2426209 | 1930-08-20 | 468.43 |
| -34 | 2426667 | 1931-11-21 | 467.78 |
| -33 | 2427141 | 1933-03-09 | 464 |
| -32 | 2427605 | 1934-06-16 | 462.71 |
| -31 | 2428065 | 1935-09-19 | 464.86 |
| -30 | 2428527 | 1936-12-24 | 464.28 |
| -29 | 2428971 | 1938-03-13 | 464.58 |
| -28 | 2429462 | 1939-07-17 | 466.08 |
| -27 | 2429922 | 1940-10-19 | 465.64 |
| -26 | 2430386 | 1942-01-26 | 468.28 |
| -25 | 2430864 | 1943-05-19 | 469.86 |
| -24 | 2431331 | 1944-08-28 | 470 |
| -23 | 2431780 | 1945-11-20 | 472.28 |
| -22 | 2432274 | 1947-03-29 | 472.5 |
| -21 | 2432737 | 1948-07-04 | 472.14 |
| -20 | 2433227 | 1949-11-06 | 472.71 |
| -19 | 2433693 | 1951-02-15 | 471.64 |
| -18 | 2434172 | 1952-06-08 | 468.57 |
| -17 | 2434633 | 1953-09-12 | 465.5 |
| -16 | 2435096 | 1954-12-19 | 464.28 |
| -15 | 2435561 | 1956-03-28 | 464.78 |
| -14 | 2436010 | 1957-06-20 | 465.36 |
| -13 | 2436471 | 1958-09-24 | 464.78 |
| -12 | 2436949 | 1960-01-15 | 463.29 |
| -11 | 2437423 | 1961-05-03 | 463.65 |
| -10 | 2437897 | 1962-08-20 | 463.5 |
| -9 | 2438339 | 1963-11-05 | 464.15 |
| -8 | 2438804 | 1965-02-12 | 464.01 |
| -7 | 2439258 | 1966-05-12 | 462.78 |
| -6 | 2439712 | 1967-08-09 | 464.78 |
| -5 | 2440206 | 1968-12-15 | 465.78 |
| -4 | 2440662 | 1970-03-16 | 465.43 |
| -3 | 2441137 | 1971-07-04 | 466.71 |
| -2 | 2441606 | 1972-10-15 | 466.86 |
| -1 | 2442058 | 1974-01-10 | 468.21 |
| 0 | 2442520 | 1975-04-17 | 471.21 |
| 1 | 2442984 | 1976-07-24 | 471.78 |
| 2 | 2443470 | 1977-11-22 | 473.36 |
| 3 | 2443953 | 1979-03-20 | 476.28 |
| 4 | 2444443 | 1980-07-22 | 478.86 |
| 5 | 2444905 | 1981-10-27 | 480.07 |
| 6 | 2445386 | 1983-02-20 | 479.36 |
| 7 | 2445860 | 1984-06-08 | 479.21 |
| 8 | 2446348 | 1985-10-09 | 480.29 |
| 9 | 2446827 | 1987-01-31 | 481.86 |
| 10 | 2447307 | 1988-05-25 | 481.78 |
| 11 | 2447798 | 1989-09-28 | 479.29 |
| 12 | 2448274 | 1991-01-17 | 476.01 |
| 13 | 2448763 | 1992-05-20 | 474.57 |
| 14 | 2449228 | 1993-08-28 | 472.86 |
| 15 | 2449690 | 1994-12-03 | 469.21 |
| 16 | 2450149 | 1996-03-06 | 465.71 |
| 17 | 2450629 | 1997-06-29 | 463.28 |
| 18 | 2451096 | 1998-10-09 | 463.71 |
| 19 | 2451545 | 2000-01-01 | 464.36 |
| 20 | 2452012 | 2001-04-12 | 462.78 |
| 21 | 2452465 | 2002-07-09 | 461.72 |
| 22 | 2452945 | 2003-11-01 | 463.01 |
| 23 | 2453395 | 2005-01-24 | 465.14 |
| 24 | 2453862 | 2006-05-06 | 467.14 |
| 25 | 2454327 | 2007-08-14 | 466.57 |
| 26 | 2454796 | 2008-11-25 | 466.21 |
| 27 | 2455273 | 2010-03-17 | 468.36 |
| 28 | 2455744 | 2011-07-01 | 467.5 |
| 29 | 2456198 | 2012-09-27 | 466.57 |
| 30 | 2456669 | 2014-01-11 | 467 |
| 31 | 2457145 | 2015-05-02 | 466.43 |
| 32 | 2457589 | 2016-07-19 | 467.36 |
| 33 | 2458066 | 2017-11-08 | 468.22 |
| 34 | 2458541 | 2019-02-26 | 465.49 |
| 35 | 2459006 | 2020-06-05 | 468.66 |
| 36 | 2459479 | 2021-09-21 | 473.58 |
| 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. |