| E | O (JD) | O (dat) | Period |
| -78 | 2415530 | 1901-05-25 | 342.86 |
| -77 | 2415870 | 1902-04-30 | 344.29 |
| -76 | 2416215 | 1903-04-10 | 344.11 |
| -75 | 2416560 | 1904-03-20 | 344.5 |
| -74 | 2416905 | 1905-02-28 | 344.9 |
| -73 | 2417240 | 1906-01-29 | 344.16 |
| -72 | 2417600 | 1907-01-24 | 343.33 |
| -71 | 2417935 | 1907-12-25 | 342.65 |
| -69 | 2418630 | 1909-11-19 | 342.25 |
| -65 | 2420012 | 1913-09-01 | 342.09 |
| -62 | 2421025 | 1916-06-10 | 341.89 |
| -61 | 2421350 | 1917-05-01 | 341.04 |
| -60 | 2421689 | 1918-04-05 | 340.78 |
| -59 | 2422035 | 1919-03-17 | 340.71 |
| -58 | 2422385 | 1920-03-01 | 343.58 |
| -57 | 2422724 | 1921-02-03 | 345.59 |
| -56 | 2423049 | 1921-12-25 | 346.9 |
| -55 | 2423398 | 1922-12-09 | 347.52 |
| -54 | 2423765 | 1923-12-11 | 347.63 |
| -49 | 2425514 | 1928-09-24 | 347.93 |
| -48 | 2425842 | 1929-08-18 | 348.39 |
| -47 | 2426202 | 1930-08-13 | 348.76 |
| -46 | 2426550 | 1931-07-27 | 348.42 |
| -45 | 2426887 | 1932-06-28 | 347.54 |
| -44 | 2427240 | 1933-06-16 | 347.83 |
| -43 | 2427588 | 1934-05-30 | 348.7 |
| -42 | 2427937 | 1935-05-14 | 348.31 |
| -41 | 2428290 | 1936-05-01 | 348.58 |
| -40 | 2428630 | 1937-04-06 | 349.14 |
| -39 | 2428988 | 1938-03-30 | 349 |
| -38 | 2429336 | 1939-03-13 | 349.09 |
| -37 | 2429679 | 1940-02-19 | 349.16 |
| -36 | 2430029 | 1941-02-03 | 348.7 |
| -35 | 2430383 | 1942-01-23 | 348.46 |
| -34 | 2430730 | 1943-01-05 | 348.26 |
| -33 | 2431080 | 1943-12-21 | 348.22 |
| -32 | 2431430 | 1944-12-05 | 347.82 |
| -24 | 2434213 | 1952-07-19 | 347.51 |
| -22 | 2434905 | 1954-06-11 | 346.25 |
| -20 | 2435604 | 1956-05-10 | 345.64 |
| -19 | 2435951 | 1957-04-22 | 345.2 |
| -18 | 2436278 | 1958-03-15 | 344.81 |
| -17 | 2436631 | 1959-03-03 | 344.09 |
| -6 | 2440408 | 1969-07-05 | 343.82 |
| -5 | 2440754 | 1970-06-16 | 343.8 |
| -4 | 2441104 | 1971-06-01 | 343.96 |
| -3 | 2441453 | 1972-05-15 | 344.15 |
| -2 | 2441787 | 1973-04-14 | 344.01 |
| -1 | 2442124 | 1974-03-17 | 343.67 |
| 0 | 2442483 | 1975-03-11 | 343.65 |
| 1 | 2442825 | 1976-02-16 | 343.09 |
| 2 | 2443160 | 1977-01-16 | 342.59 |
| 3 | 2443513 | 1978-01-04 | 342.45 |
| 4 | 2443840 | 1978-11-27 | 342.41 |
| 5 | 2444200 | 1979-11-22 | 341.91 |
| 8 | 2445219 | 1982-09-06 | 341.97 |
| 9 | 2445554 | 1983-08-07 | 342.35 |
| 10 | 2445896 | 1984-07-14 | 342.19 |
| 11 | 2446248 | 1985-07-01 | 342.78 |
| 12 | 2446585 | 1986-06-03 | 342.58 |
| 13 | 2446927 | 1987-05-11 | 343.75 |
| 14 | 2447278 | 1988-04-26 | 344.52 |
| 15 | 2447614 | 1989-03-28 | 344.88 |
| 16 | 2447964 | 1990-03-13 | 345.22 |
| 17 | 2448305 | 1991-02-17 | 346.43 |
| 18 | 2448655 | 1992-02-02 | 347.87 |
| 19 | 2449003 | 1993-01-15 | 349.46 |
| 20 | 2449349 | 1993-12-27 | 350.95 |
| 21 | 2449697 | 1994-12-10 | 351.86 |
| 22 | 2450054 | 1995-12-02 | 352.51 |
| 23 | 2450416 | 1996-11-28 | 352.11 |
| 24 | 2450775 | 1997-11-22 | 351.76 |
| 25 | 2451121 | 1998-11-03 | 350.98 |
| 26 | 2451474 | 1999-10-22 | 349.83 |
| 27 | 2451820 | 2000-10-02 | 348.26 |
| 28 | 2452159 | 2001-09-06 | 346.95 |
| 29 | 2452511 | 2002-08-24 | 345.4 |
| 30 | 2452855 | 2003-08-03 | 344.47 |
| 31 | 2453202 | 2004-07-15 | 343.51 |
| 32 | 2453546 | 2005-06-24 | 342.84 |
| 33 | 2453893 | 2006-06-06 | 342.74 |
| 34 | 2454221 | 2007-04-30 | 342.14 |
| 35 | 2454565 | 2008-04-08 | 341.44 |
| 36 | 2454907 | 2009-03-16 | 340.66 |
| 37 | 2455247 | 2010-02-19 | 340.91 |
| 38 | 2455599 | 2011-02-06 | 341.06 |
| 39 | 2455937 | 2012-01-10 | 341.04 |
| 40 | 2456268 | 2012-12-06 | 340.35 |
| 41 | 2456605 | 2013-11-08 | 339.75 |
| 42 | 2456961 | 2014-10-30 | 339.61 |
| 43 | 2457298 | 2015-10-02 | 339.46 |
| 44 | 2457628 | 2016-08-27 | 340 |
| 45 | 2457967 | 2017-08-01 | 340.41 |
| 46 | 2458305 | 2018-07-05 | 340.29 |
| 47 | 2458653 | 2019-06-18 | 339.8 |
| 48 | 2458994 | 2020-05-24 | 340.57 |
| 49 | 2459336 | 2021-05-01 | 341.71 |
| 50 | 2459675 | 2022-04-05 | 342.11 |
| 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. |