| E | O (JD) | O (dat) | Period |
| -72 | 2413662 | 1896-04-12 | 438.81 |
| -71 | 2414110 | 1897-07-04 | 438.89 |
| -70 | 2414550 | 1898-09-17 | 440.33 |
| -69 | 2414982 | 1899-11-23 | 442.22 |
| -67 | 2415860 | 1902-04-20 | 442.51 |
| -66 | 2416300 | 1903-07-04 | 442.58 |
| -65 | 2416740 | 1904-09-16 | 442.42 |
| -64 | 2417200 | 1905-12-20 | 442.59 |
| -62 | 2418100 | 1908-06-07 | 441.84 |
| -61 | 2418530 | 1909-08-11 | 440.87 |
| -60 | 2418970 | 1910-10-25 | 441 |
| -59 | 2419402 | 1911-12-31 | 440.21 |
| -58 | 2419844 | 1913-03-17 | 439.57 |
| -55 | 2421150 | 1916-10-13 | 439.38 |
| -54 | 2421588 | 1917-12-25 | 439.69 |
| -53 | 2422060 | 1919-04-11 | 440.15 |
| -52 | 2422480 | 1920-06-04 | 440.27 |
| -51 | 2422930 | 1921-08-28 | 440.95 |
| -50 | 2423367 | 1922-11-08 | 440.77 |
| -49 | 2423797 | 1924-01-12 | 439.57 |
| -48 | 2424249 | 1925-04-08 | 438.93 |
| -47 | 2424677 | 1926-06-10 | 438.22 |
| -46 | 2425139 | 1927-09-15 | 437.86 |
| -45 | 2425555 | 1928-11-04 | 438.44 |
| -44 | 2425992 | 1930-01-15 | 438.44 |
| -43 | 2426447 | 1931-04-15 | 436.05 |
| -42 | 2426851 | 1932-05-23 | 435.75 |
| -41 | 2427313 | 1933-08-28 | 435.19 |
| -40 | 2427760 | 1934-11-18 | 435.02 |
| -39 | 2428189 | 1936-01-21 | 434.19 |
| -38 | 2428585 | 1937-02-20 | 433.28 |
| -37 | 2429046 | 1938-05-27 | 434.19 |
| -36 | 2429486 | 1939-08-10 | 433.36 |
| -35 | 2429902 | 1940-09-29 | 434.35 |
| -34 | 2430341 | 1941-12-12 | 436.01 |
| -33 | 2430772 | 1943-02-16 | 436.52 |
| -32 | 2431222 | 1944-05-11 | 435.2 |
| -31 | 2431654 | 1945-07-17 | 435.5 |
| -30 | 2432100 | 1946-10-06 | 437.03 |
| -29 | 2432536 | 1947-12-16 | 436.74 |
| -28 | 2432951 | 1949-02-03 | 437.06 |
| -27 | 2433388 | 1950-04-16 | 436.67 |
| -26 | 2433831 | 1951-07-03 | 437.29 |
| -25 | 2434287 | 1952-10-01 | 437.53 |
| -24 | 2434708 | 1953-11-26 | 437.8 |
| -23 | 2435156 | 1955-02-17 | 438.32 |
| -22 | 2435586 | 1956-04-22 | 437.71 |
| -21 | 2436031 | 1957-07-11 | 436.88 |
| -20 | 2436466 | 1958-09-19 | 437.32 |
| -19 | 2436894 | 1959-11-21 | 437.71 |
| -18 | 2437335 | 1961-02-04 | 438.25 |
| -17 | 2437772 | 1962-04-17 | 438.18 |
| -16 | 2438207 | 1963-06-26 | 438.66 |
| -15 | 2438667 | 1964-09-28 | 439.32 |
| -14 | 2439086 | 1965-11-21 | 439.5 |
| -13 | 2439544 | 1967-02-22 | 438.99 |
| -12 | 2439960 | 1968-04-13 | 439.35 |
| -11 | 2440417 | 1969-07-14 | 439.85 |
| -10 | 2440853 | 1970-09-23 | 439.73 |
| -9 | 2441285 | 1971-11-29 | 440.52 |
| -8 | 2441720 | 1973-02-06 | 439.74 |
| -7 | 2442175 | 1974-05-07 | 440.06 |
| -6 | 2442622 | 1975-07-28 | 439.08 |
| -5 | 2443056 | 1976-10-04 | 439.12 |
| -4 | 2443494 | 1977-12-16 | 439.25 |
| -3 | 2443922 | 1979-02-17 | 438.15 |
| -2 | 2444364 | 1980-05-04 | 437.13 |
| -1 | 2444800 | 1981-07-14 | 437.14 |
| 0 | 2445242 | 1982-09-29 | 437.35 |
| 1 | 2445686 | 1983-12-17 | 438.12 |
| 2 | 2446107 | 1985-02-10 | 438.75 |
| 3 | 2446551 | 1986-04-30 | 439.24 |
| 4 | 2446994 | 1987-07-17 | 439.43 |
| 5 | 2447426 | 1988-09-21 | 438.65 |
| 6 | 2447878 | 1989-12-17 | 438.26 |
| 7 | 2448314 | 1991-02-26 | 438.31 |
| 8 | 2448761 | 1992-05-18 | 437.53 |
| 9 | 2449192 | 1993-07-23 | 436.84 |
| 10 | 2449613 | 1994-09-17 | 435.27 |
| 11 | 2450054 | 1995-12-02 | 433.47 |
| 12 | 2450493 | 1997-02-13 | 432.7 |
| 13 | 2450931 | 1998-04-27 | 431.81 |
| 14 | 2451365 | 1999-07-05 | 431.97 |
| 15 | 2451777 | 2000-08-20 | 432.48 |
| 16 | 2452210 | 2001-10-27 | 431.47 |
| 17 | 2452647 | 2003-01-07 | 431.6 |
| 18 | 2453075 | 2004-03-10 | 431.97 |
| 19 | 2453514 | 2005-05-23 | 433.02 |
| 20 | 2453955 | 2006-08-07 | 434.09 |
| 21 | 2454369 | 2007-09-25 | 435.25 |
| 22 | 2454816 | 2008-12-15 | 434.85 |
| 23 | 2455247 | 2010-02-19 | 435.81 |
| 24 | 2455687 | 2011-05-05 | 436.25 |
| 25 | 2456118 | 2012-07-09 | 437.41 |
| 26 | 2456576 | 2013-10-10 | 438.7 |
| 27 | 2456982 | 2014-11-20 | 438.65 |
| 28 | 2457442 | 2016-02-23 | 438.29 |
| 29 | 2457876 | 2017-05-02 | 438.26 |
| 30 | 2458325 | 2018-07-25 | 438.35 |
| 31 | 2458761 | 2019-10-04 | 437.74 |
| 32 | 2459196 | 2020-12-12 | 439.32 |
| 33 | 2459618 | 2022-02-07 | 436.46 |
| 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. |