| E | O (JD) | O (dat) | Period |
| -81 | 2414898 | 1899-08-31 | 327.56 |
| -74 | 2417170 | 1905-11-20 | 327.35 |
| -72 | 2417820 | 1907-09-01 | 326.53 |
| -65 | 2420130 | 1913-12-28 | 326.2 |
| -64 | 2420460 | 1914-11-23 | 325.76 |
| -63 | 2420785 | 1915-10-14 | 325.54 |
| -62 | 2421100 | 1916-08-24 | 325.01 |
| -57 | 2422710 | 1921-01-20 | 323.52 |
| -56 | 2423040 | 1921-12-16 | 321.51 |
| -55 | 2423350 | 1922-10-22 | 321.16 |
| -54 | 2423680 | 1923-09-17 | 320.55 |
| -53 | 2424000 | 1924-08-02 | 320.27 |
| -48 | 2425600 | 1928-12-19 | 320.42 |
| -47 | 2425920 | 1929-11-04 | 320.54 |
| -46 | 2426240 | 1930-09-20 | 321.04 |
| -45 | 2426540 | 1931-07-17 | 320.99 |
| -44 | 2426870 | 1932-06-11 | 321.63 |
| -39 | 2428495 | 1936-11-22 | 322.47 |
| -38 | 2428810 | 1937-10-03 | 323.06 |
| -37 | 2429140 | 1938-08-29 | 323.58 |
| -36 | 2429450 | 1939-07-05 | 324.36 |
| -33 | 2430430 | 1942-03-11 | 324.5 |
| -30 | 2431400 | 1944-11-05 | 325.13 |
| -29 | 2431731 | 1945-10-02 | 326.41 |
| -28 | 2432055 | 1946-08-22 | 326.46 |
| -27 | 2432391 | 1947-07-24 | 326.35 |
| -24 | 2433361 | 1950-03-20 | 325.95 |
| -21 | 2434345 | 1952-11-28 | 325.77 |
| -10 | 2437952 | 1962-10-14 | 325.4 |
| -3 | 2440220 | 1968-12-29 | 324.96 |
| -2 | 2440530 | 1969-11-04 | 324.37 |
| -1 | 2440835 | 1970-09-05 | 323.84 |
| 0 | 2441168 | 1971-08-04 | 322.91 |
| 1 | 2441476 | 1972-06-07 | 320.48 |
| 3 | 2442110 | 1974-03-03 | 320.17 |
| 5 | 2442750 | 1975-12-03 | 320.14 |
| 6 | 2443080 | 1976-10-28 | 320.01 |
| 7 | 2443414 | 1977-09-27 | 319.74 |
| 8 | 2443740 | 1978-08-19 | 319.77 |
| 9 | 2444050 | 1979-06-25 | 319.47 |
| 12 | 2444990 | 1982-01-20 | 319.1 |
| 13 | 2445310 | 1982-12-06 | 319.22 |
| 14 | 2445638 | 1983-10-30 | 319.55 |
| 15 | 2445952 | 1984-09-08 | 320.5 |
| 16 | 2446275 | 1985-07-28 | 321.52 |
| 17 | 2446601 | 1986-06-19 | 323.04 |
| 21 | 2447888 | 1989-12-27 | 323.34 |
| 22 | 2448211 | 1990-11-15 | 324.16 |
| 23 | 2448541 | 1991-10-11 | 325.16 |
| 24 | 2448857 | 1992-08-22 | 325.9 |
| 25 | 2449200 | 1993-07-31 | 326.71 |
| 26 | 2449515 | 1994-06-11 | 328.28 |
| 28 | 2450182 | 1996-04-08 | 328.64 |
| 29 | 2450510 | 1997-03-02 | 328.54 |
| 30 | 2450837 | 1998-01-23 | 328.8 |
| 31 | 2451163 | 1998-12-15 | 328.75 |
| 32 | 2451497 | 1999-11-14 | 329.21 |
| 33 | 2451824 | 2000-10-06 | 328.58 |
| 34 | 2452146 | 2001-08-24 | 328.85 |
| 35 | 2452480 | 2002-07-24 | 328.53 |
| 36 | 2452816 | 2003-06-25 | 328.49 |
| 37 | 2453141 | 2004-05-15 | 328.52 |
| 38 | 2453462 | 2005-04-01 | 328.48 |
| 39 | 2453799 | 2006-03-04 | 328.38 |
| 40 | 2454116 | 2007-01-15 | 327.57 |
| 41 | 2454451 | 2007-12-16 | 326.07 |
| 42 | 2454784 | 2008-11-13 | 326.05 |
| 43 | 2455106 | 2009-10-01 | 325.89 |
| 44 | 2455434 | 2010-08-25 | 325.61 |
| 49 | 2457067 | 2015-02-13 | 325.54 |
| 50 | 2457364 | 2015-12-07 | 325.04 |
| 51 | 2457710 | 2016-11-17 | 324.89 |
| 52 | 2458033 | 2017-10-06 | 324.96 |
| 53 | 2458360 | 2018-08-29 | 324.88 |
| 54 | 2458683 | 2019-07-18 | 325.05 |
| 55 | 2459003 | 2020-06-02 | 326.18 |
| 56 | 2459333 | 2021-04-28 | 324.43 |
| 57 | 2459657 | 2022-03-18 | 324.54 |
| 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. |