| E | O (JD) | O (dat) | Period |
| -78 | 2415530 | 1901-05-25 | 345.51 |
| -77 | 2415860 | 1902-04-20 | 343.77 |
| -76 | 2416215 | 1903-04-10 | 344.58 |
| -75 | 2416560 | 1904-03-20 | 345.27 |
| -74 | 2416905 | 1905-02-28 | 344.54 |
| -73 | 2417240 | 1906-01-29 | 343.33 |
| -72 | 2417600 | 1907-01-24 | 342.33 |
| -65 | 2420012 | 1913-09-01 | 342.17 |
| -62 | 2421025 | 1916-06-10 | 342.5 |
| -61 | 2421350 | 1917-05-01 | 342.3 |
| -60 | 2421695 | 1918-04-11 | 340.04 |
| -59 | 2422035 | 1919-03-17 | 338.12 |
| -58 | 2422385 | 1920-03-01 | 344.06 |
| -57 | 2422724 | 1921-02-03 | 346.3 |
| -56 | 2423049 | 1921-12-25 | 346.41 |
| -55 | 2423398 | 1922-12-09 | 347.16 |
| -49 | 2425514 | 1928-09-24 | 347 |
| -48 | 2425842 | 1929-08-18 | 348.08 |
| -47 | 2426202 | 1930-08-13 | 349.21 |
| -46 | 2426550 | 1931-07-27 | 347.69 |
| -45 | 2426887 | 1932-06-28 | 347.42 |
| -44 | 2427240 | 1933-06-16 | 348.29 |
| -43 | 2427588 | 1934-05-30 | 347.72 |
| -42 | 2427930 | 1935-05-07 | 349.29 |
| -41 | 2428290 | 1936-05-01 | 349.21 |
| -40 | 2428630 | 1937-04-06 | 348.56 |
| -39 | 2428990 | 1938-04-01 | 349.56 |
| -38 | 2429337 | 1939-03-14 | 349 |
| -37 | 2429679 | 1940-02-19 | 348.57 |
| -36 | 2430029 | 1941-02-03 | 348.38 |
| -35 | 2430383 | 1942-01-23 | 347.55 |
| -24 | 2434213 | 1952-07-19 | 347.33 |
| -20 | 2435604 | 1956-05-10 | 346.62 |
| -19 | 2435951 | 1957-04-22 | 345.83 |
| -18 | 2436278 | 1958-03-15 | 345.24 |
| -17 | 2436631 | 1959-03-03 | 344.33 |
| -6 | 2440408 | 1969-07-05 | 343.68 |
| -5 | 2440754 | 1970-06-16 | 343.59 |
| -4 | 2441104 | 1971-06-01 | 344.06 |
| -3 | 2441453 | 1972-05-15 | 344.55 |
| -2 | 2441787 | 1973-04-14 | 344.51 |
| -1 | 2442124 | 1974-03-17 | 343.93 |
| 0 | 2442483 | 1975-03-11 | 342.56 |
| 1 | 2442825 | 1976-02-16 | 342.85 |
| 2 | 2443160 | 1977-01-16 | 344.25 |
| 3 | 2443513 | 1978-01-04 | 342.56 |
| 4 | 2443840 | 1978-11-27 | 341.22 |
| 5 | 2444200 | 1979-11-22 | 342.17 |
| 8 | 2445219 | 1982-09-06 | 342.23 |
| 9 | 2445554 | 1983-08-07 | 342.17 |
| 10 | 2445896 | 1984-07-14 | 342.5 |
| 11 | 2446248 | 1985-07-01 | 342.06 |
| 12 | 2446585 | 1986-06-03 | 343.21 |
| 13 | 2446927 | 1987-05-11 | 344.22 |
| 14 | 2447278 | 1988-04-26 | 344 |
| 15 | 2447614 | 1989-03-28 | 344.64 |
| 16 | 2447964 | 1990-03-13 | 345.71 |
| 17 | 2448305 | 1991-02-17 | 345.79 |
| 18 | 2448655 | 1992-02-02 | 347.08 |
| 19 | 2449003 | 1993-01-15 | 349.43 |
| 20 | 2449349 | 1993-12-27 | 351.56 |
| 21 | 2449697 | 1994-12-10 | 352.56 |
| 22 | 2450054 | 1995-12-02 | 352.64 |
| 23 | 2450416 | 1996-11-28 | 353.01 |
| 24 | 2450775 | 1997-11-22 | 352.36 |
| 25 | 2451121 | 1998-11-03 | 351.35 |
| 26 | 2451474 | 1999-10-22 | 349.71 |
| 27 | 2451820 | 2000-10-02 | 347.58 |
| 28 | 2452159 | 2001-09-06 | 346.58 |
| 29 | 2452511 | 2002-08-24 | 346 |
| 30 | 2452855 | 2003-08-03 | 344.28 |
| 31 | 2453202 | 2004-07-15 | 343.35 |
| 32 | 2453546 | 2005-06-24 | 343 |
| 33 | 2453893 | 2006-06-06 | 342.01 |
| 34 | 2454221 | 2007-04-30 | 342.07 |
| 35 | 2454565 | 2008-04-08 | 341.99 |
| 36 | 2454907 | 2009-03-16 | 340.43 |
| 37 | 2455247 | 2010-02-19 | 339.94 |
| 38 | 2455599 | 2011-02-06 | 341.44 |
| 39 | 2455937 | 2012-01-10 | 341.93 |
| 40 | 2456268 | 2012-12-06 | 340.85 |
| 41 | 2456605 | 2013-11-08 | 339.21 |
| 42 | 2456961 | 2014-10-30 | 338.29 |
| 43 | 2457298 | 2015-10-02 | 339.51 |
| 44 | 2457628 | 2016-08-27 | 341 |
| 45 | 2457967 | 2017-08-01 | 340.28 |
| 46 | 2458305 | 2018-07-05 | 339.43 |
| 47 | 2458653 | 2019-06-18 | 340.07 |
| 48 | 2458994 | 2020-05-24 | 341.46 |
| 49 | 2459336 | 2021-05-01 | 342.84 |
| 50 | 2459675 | 2022-04-05 | 343.8 |
| 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. |