| E | O (JD) | O (dat) | Period |
| -98 | 2415741 | 1901-12-22 | 343.63 |
| -97 | 2416087 | 1902-12-03 | 345.07 |
| -96 | 2416424 | 1903-11-05 | 345.67 |
| -95 | 2416756 | 1904-10-02 | 345.77 |
| -94 | 2417117 | 1905-09-28 | 345.56 |
| -93 | 2417462 | 1906-09-08 | 346.74 |
| -92 | 2417814 | 1907-08-26 | 348 |
| -91 | 2418159 | 1908-08-05 | 349.71 |
| -90 | 2418502 | 1909-07-14 | 350.44 |
| -89 | 2418843 | 1910-06-20 | 350.42 |
| -88 | 2419217 | 1911-06-29 | 350.59 |
| -87 | 2419563 | 1912-06-09 | 350.15 |
| -86 | 2419922 | 1913-06-03 | 349.85 |
| -85 | 2420263 | 1914-05-10 | 348.77 |
| -84 | 2420616 | 1915-04-28 | 347.59 |
| -83 | 2420959 | 1916-04-05 | 345.53 |
| -82 | 2421300 | 1917-03-12 | 344.73 |
| -81 | 2421648 | 1918-02-23 | 343.52 |
| -80 | 2421984 | 1919-01-25 | 343.43 |
| -79 | 2422335 | 1920-01-11 | 342.67 |
| -78 | 2422673 | 1920-12-14 | 342.75 |
| -77 | 2423018 | 1921-11-24 | 343.11 |
| -76 | 2423354 | 1922-10-26 | 342.89 |
| -75 | 2423706 | 1923-10-13 | 342.82 |
| -74 | 2424039 | 1924-09-10 | 343.22 |
| -73 | 2424389 | 1925-08-26 | 344.01 |
| -72 | 2424738 | 1926-08-10 | 345.22 |
| -71 | 2425072 | 1927-07-10 | 346.8 |
| -70 | 2425412 | 1928-06-14 | 347.67 |
| -69 | 2425772 | 1929-06-09 | 348.55 |
| -68 | 2426117 | 1930-05-20 | 348.75 |
| -67 | 2426477 | 1931-05-15 | 348.52 |
| -66 | 2426832 | 1932-05-04 | 349.25 |
| -65 | 2427176 | 1933-04-13 | 348.85 |
| -64 | 2427518 | 1934-03-21 | 348.32 |
| -63 | 2427866 | 1935-03-04 | 347.14 |
| -62 | 2428202 | 1936-02-03 | 347.05 |
| -61 | 2428567 | 1937-02-02 | 346.84 |
| -60 | 2428907 | 1938-01-08 | 347.29 |
| -59 | 2429263 | 1938-12-30 | 347.2 |
| -58 | 2429587 | 1939-11-19 | 347.19 |
| -57 | 2429960 | 1940-11-26 | 347.17 |
| -56 | 2430294 | 1941-10-26 | 346.01 |
| -55 | 2430646 | 1942-10-13 | 345.88 |
| -54 | 2430984 | 1943-09-16 | 345.4 |
| -53 | 2431337 | 1944-09-03 | 345.04 |
| -52 | 2431683 | 1945-08-15 | 343.05 |
| -51 | 2432018 | 1946-07-16 | 343.07 |
| -50 | 2432366 | 1947-06-29 | 343.02 |
| -49 | 2432710 | 1948-06-07 | 343.2 |
| -48 | 2433046 | 1949-05-09 | 343.59 |
| -47 | 2433378 | 1950-04-06 | 344.31 |
| -46 | 2433733 | 1951-03-27 | 345.2 |
| -45 | 2434085 | 1952-03-13 | 345.21 |
| -44 | 2434426 | 1953-02-17 | 345.72 |
| -43 | 2434781 | 1954-02-07 | 345.21 |
| -42 | 2435124 | 1955-01-16 | 345.44 |
| -41 | 2435470 | 1955-12-28 | 344.67 |
| -40 | 2435806 | 1956-11-28 | 343.55 |
| -39 | 2436157 | 1957-11-14 | 343.66 |
| -38 | 2436480 | 1958-10-03 | 343.59 |
| -37 | 2436847 | 1959-10-05 | 344.11 |
| -36 | 2437187 | 1960-09-09 | 344.65 |
| -35 | 2437515 | 1961-08-03 | 345.29 |
| -34 | 2437876 | 1962-07-30 | 346.15 |
| -33 | 2438221 | 1963-07-10 | 346.64 |
| -32 | 2438567 | 1964-06-20 | 345.58 |
| -31 | 2438913 | 1965-06-01 | 346.07 |
| -30 | 2439258 | 1966-05-12 | 346.97 |
| -29 | 2439617 | 1967-05-06 | 346.72 |
| -28 | 2439950 | 1968-04-03 | 347.19 |
| -27 | 2440287 | 1969-03-06 | 347.4 |
| -26 | 2440642 | 1970-02-24 | 348 |
| -25 | 2441002 | 1971-02-19 | 347.89 |
| -24 | 2441346 | 1972-01-29 | 347.94 |
| -23 | 2441695 | 1973-01-12 | 348.37 |
| -22 | 2442039 | 1973-12-22 | 348.25 |
| -21 | 2442396 | 1974-12-14 | 347.21 |
| -20 | 2442731 | 1975-11-14 | 346.66 |
| -19 | 2443084 | 1976-11-01 | 346.51 |
| -18 | 2443427 | 1977-10-10 | 346.04 |
| -17 | 2443777 | 1978-09-25 | 345.76 |
| -16 | 2444118 | 1979-09-01 | 344.62 |
| -15 | 2444469 | 1980-08-17 | 344.31 |
| -14 | 2444811 | 1981-07-25 | 342.9 |
| -13 | 2445153 | 1982-07-02 | 342.6 |
| -12 | 2445500 | 1983-06-14 | 341.15 |
| -11 | 2445829 | 1984-05-08 | 341.57 |
| -10 | 2446177 | 1985-04-21 | 340.66 |
| -9 | 2446507 | 1986-03-17 | 341.55 |
| -8 | 2446863 | 1987-03-08 | 342.18 |
| -7 | 2447182 | 1988-01-21 | 343.49 |
| -6 | 2447554 | 1989-01-27 | 344.52 |
| -5 | 2447871 | 1989-12-10 | 345.35 |
| -4 | 2448240 | 1990-12-14 | 345.85 |
| -3 | 2448578 | 1991-11-17 | 346.59 |
| -2 | 2448936 | 1992-11-09 | 347.73 |
| -1 | 2449270 | 1993-10-09 | 346.75 |
| 0 | 2449625 | 1994-09-29 | 347.87 |
| 1 | 2449959 | 1995-08-29 | 347.68 |
| 2 | 2450325 | 1996-08-29 | 348.14 |
| 3 | 2450670 | 1997-08-09 | 348.62 |
| 4 | 2451002 | 1998-07-07 | 349.12 |
| 5 | 2451366 | 1999-07-06 | 348.64 |
| 6 | 2451719 | 2000-06-23 | 349.06 |
| 7 | 2452060 | 2001-05-30 | 348.03 |
| 8 | 2452419 | 2002-05-24 | 348.27 |
| 9 | 2452758 | 2003-04-28 | 348.47 |
| 10 | 2453100 | 2004-04-04 | 347.01 |
| 11 | 2453460 | 2005-03-30 | 346.36 |
| 12 | 2453794 | 2006-02-27 | 345.91 |
| 13 | 2454150 | 2007-02-18 | 344.72 |
| 14 | 2454500 | 2008-02-03 | 344.46 |
| 15 | 2454831 | 2008-12-30 | 344.1 |
| 16 | 2455178 | 2009-12-12 | 343.75 |
| 17 | 2455521 | 2010-11-20 | 344.12 |
| 18 | 2455856 | 2011-10-21 | 344.6 |
| 19 | 2456205 | 2012-10-04 | 345.54 |
| 20 | 2456553 | 2013-09-17 | 346.65 |
| 21 | 2456902 | 2014-09-01 | 347.47 |
| 22 | 2457246 | 2015-08-11 | 348.55 |
| 23 | 2457605 | 2016-08-04 | 348.49 |
| 24 | 2457950 | 2017-07-15 | 348.25 |
| 25 | 2458294 | 2018-06-24 | 348.18 |
| 26 | 2458649 | 2019-06-14 | 348.02 |
| 27 | 2459002 | 2020-06-01 | 347.81 |
| 28 | 2459330 | 2021-04-25 | 346.82 |
| 29 | 2459686 | 2022-04-16 | 346.89 |
| 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. |