| E | O (JD) | O (dat) | Period |
| -89 | 2414457 | 1898-06-16 | 337.95 |
| -88 | 2414805 | 1899-05-30 | 337.29 |
| -87 | 2415141 | 1900-05-01 | 336.83 |
| -83 | 2416480 | 1903-12-31 | 337.87 |
| -82 | 2416826 | 1904-12-11 | 336.4 |
| -81 | 2417157 | 1905-11-07 | 335 |
| -80 | 2417497 | 1906-10-13 | 335.47 |
| -79 | 2417839 | 1907-09-20 | 332.99 |
| -78 | 2418151 | 1908-07-28 | 330 |
| -77 | 2418495 | 1909-07-07 | 328.79 |
| -76 | 2418829 | 1910-06-06 | 327.15 |
| -75 | 2419139 | 1911-04-12 | 327.58 |
| -74 | 2419464 | 1912-03-02 | 328.65 |
| -73 | 2419793 | 1913-01-25 | 328 |
| -72 | 2420123 | 1913-12-21 | 329.65 |
| -71 | 2420453 | 1914-11-16 | 332.57 |
| -70 | 2420794 | 1915-10-23 | 334.49 |
| -69 | 2421122 | 1916-09-15 | 336 |
| -68 | 2421461 | 1917-08-20 | 336.29 |
| -67 | 2421798 | 1918-07-23 | 335.22 |
| -66 | 2422142 | 1919-07-02 | 334.5 |
| -65 | 2422478 | 1920-06-02 | 334.93 |
| -64 | 2422806 | 1921-04-26 | 334.15 |
| -63 | 2423134 | 1922-03-20 | 332.86 |
| -62 | 2423465 | 1923-02-14 | 332.07 |
| -61 | 2423807 | 1924-01-22 | 331.99 |
| -60 | 2424130 | 1924-12-10 | 332.56 |
| -59 | 2424470 | 1925-11-15 | 333.93 |
| -58 | 2424799 | 1926-10-10 | 334.5 |
| -57 | 2425133 | 1927-09-09 | 335.08 |
| -56 | 2425463 | 1928-08-04 | 335.5 |
| -55 | 2425811 | 1929-07-18 | 335.5 |
| -54 | 2426144 | 1930-06-16 | 336.58 |
| -53 | 2426484 | 1931-05-22 | 336.29 |
| -52 | 2426813 | 1932-04-15 | 336.64 |
| -51 | 2427153 | 1933-03-21 | 337.49 |
| -50 | 2427491 | 1934-02-22 | 337.28 |
| -49 | 2427813 | 1935-01-10 | 337.78 |
| -48 | 2428174 | 1936-01-06 | 338.93 |
| -47 | 2428506 | 1936-12-03 | 339.5 |
| -46 | 2428844 | 1937-11-06 | 340.58 |
| -45 | 2429182 | 1938-10-10 | 340.15 |
| -44 | 2429529 | 1939-09-22 | 339.58 |
| -43 | 2429868 | 1940-08-26 | 339.54 |
| -42 | 2430204 | 1941-07-28 | 338.19 |
| -41 | 2430545 | 1942-07-04 | 336.5 |
| -40 | 2430889 | 1943-06-13 | 336.74 |
| -38 | 2431554 | 1945-04-08 | 338.87 |
| -37 | 2431883 | 1946-03-03 | 340.32 |
| -36 | 2432212 | 1947-01-26 | 341 |
| -35 | 2432573 | 1948-01-22 | 341.8 |
| -34 | 2432921 | 1949-01-04 | 344.15 |
| -33 | 2433273 | 1949-12-22 | 345.36 |
| -32 | 2433617 | 1950-12-01 | 343.5 |
| -31 | 2433953 | 1951-11-02 | 342.35 |
| -30 | 2434302 | 1952-10-16 | 341.7 |
| -29 | 2434628 | 1953-09-07 | 341.35 |
| -28 | 2434966 | 1954-08-11 | 342.14 |
| -27 | 2435321 | 1955-08-01 | 341.22 |
| -26 | 2435657 | 1956-07-02 | 341.65 |
| -25 | 2436012 | 1957-06-22 | 343.43 |
| -24 | 2436348 | 1958-05-24 | 341.58 |
| -23 | 2436684 | 1959-04-25 | 339.22 |
| -22 | 2437029 | 1960-04-04 | 339.72 |
| -21 | 2437373 | 1961-03-14 | 340.43 |
| -20 | 2437696 | 1962-01-31 | 340.63 |
| -19 | 2438031 | 1963-01-01 | 340.93 |
| -18 | 2438394 | 1963-12-30 | 340.58 |
| -17 | 2438732 | 1964-12-02 | 341.43 |
| -16 | 2439069 | 1965-11-04 | 342.72 |
| -15 | 2439417 | 1966-10-18 | 340.93 |
| -14 | 2439753 | 1967-09-19 | 339 |
| -13 | 2440096 | 1968-08-27 | 339.65 |
| -12 | 2440429 | 1969-07-26 | 339.64 |
| -11 | 2440769 | 1970-07-01 | 338.7 |
| -10 | 2441103 | 1971-05-31 | 338.35 |
| -9 | 2441453 | 1972-05-15 | 337.71 |
| -8 | 2441788 | 1973-04-15 | 337.93 |
| -7 | 2442124 | 1974-03-17 | 338.08 |
| -6 | 2442462 | 1975-02-18 | 337 |
| -5 | 2442791 | 1976-01-13 | 336 |
| -4 | 2443138 | 1976-12-25 | 335.29 |
| -3 | 2443467 | 1977-11-19 | 334.43 |
| -2 | 2443807 | 1978-10-25 | 335.14 |
| -1 | 2444138 | 1979-09-21 | 335.78 |
| 0 | 2444468 | 1980-08-16 | 335.49 |
| 1 | 2444800 | 1981-07-14 | 334.78 |
| 2 | 2445145 | 1982-06-24 | 334.78 |
| 3 | 2445485 | 1983-05-30 | 335.65 |
| 4 | 2445817 | 1984-04-26 | 334.86 |
| 5 | 2446144 | 1985-03-19 | 333.43 |
| 6 | 2446488 | 1986-02-26 | 333.22 |
| 7 | 2446817 | 1987-01-21 | 334.29 |
| 8 | 2447139 | 1987-12-09 | 335.29 |
| 9 | 2447474 | 1988-11-08 | 335.14 |
| 10 | 2447821 | 1989-10-21 | 335.13 |
| 11 | 2448161 | 1990-09-26 | 337.06 |
| 12 | 2448494 | 1991-08-25 | 338 |
| 13 | 2448830 | 1992-07-26 | 336.36 |
| 14 | 2449167 | 1993-06-28 | 335.22 |
| 15 | 2449508 | 1994-06-04 | 335.43 |
| 16 | 2449837 | 1995-04-29 | 335.08 |
| 17 | 2450167 | 1996-03-24 | 334.15 |
| 18 | 2450508 | 1997-02-28 | 333.58 |
| 19 | 2450843 | 1998-01-29 | 333.64 |
| 20 | 2451172 | 1998-12-24 | 334.42 |
| 21 | 2451503 | 1999-11-20 | 334.99 |
| 22 | 2451842 | 2000-10-24 | 335.07 |
| 23 | 2452174 | 2001-09-21 | 336.08 |
| 24 | 2452512 | 2002-08-25 | 336.29 |
| 25 | 2452853 | 2003-08-01 | 335.29 |
| 26 | 2453189 | 2004-07-02 | 334.86 |
| 27 | 2453531 | 2005-06-09 | 335.43 |
| 28 | 2453852 | 2006-04-26 | 335.22 |
| 29 | 2454187 | 2007-03-27 | 335.28 |
| 30 | 2454517 | 2008-02-20 | 334.7 |
| 31 | 2454865 | 2009-02-02 | 335.21 |
| 32 | 2455193 | 2009-12-27 | 338 |
| 33 | 2455543 | 2010-12-12 | 339.15 |
| 34 | 2455863 | 2011-10-28 | 339.43 |
| 35 | 2456213 | 2012-10-12 | 339.43 |
| 36 | 2456558 | 2013-09-22 | 339.22 |
| 37 | 2456894 | 2014-08-24 | 339.72 |
| 38 | 2457240 | 2015-08-05 | 340 |
| 39 | 2457570 | 2016-06-30 | 338.99 |
| 40 | 2457915 | 2017-06-10 | 338.7 |
| 41 | 2458247 | 2018-05-08 | 338.28 |
| 42 | 2458589 | 2019-04-15 | 337.72 |
| 43 | 2458928 | 2020-03-19 | 337.49 |
| 44 | 2459266 | 2021-02-20 | 338.06 |
| 45 | 2459604 | 2022-01-24 | 338.34 |
| 46 | 2459934 | 2022-12-20 | 337.61 |
| 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. |