| E | O (JD) | O (dat) | Period |
| -78 | 2410929 | 1888-10-18 | 398.68 |
| -72 | 2413350 | 1895-06-05 | 397.58 |
| -71 | 2413745 | 1896-07-04 | 397.34 |
| -70 | 2414140 | 1897-08-03 | 396.73 |
| -69 | 2414525 | 1898-08-23 | 396.81 |
| -68 | 2414905 | 1899-09-07 | 396.33 |
| -67 | 2415303 | 1900-10-10 | 394 |
| -66 | 2415711 | 1901-11-22 | 393.26 |
| -65 | 2416096 | 1902-12-12 | 393.27 |
| -62 | 2417300 | 1906-03-30 | 393.55 |
| -61 | 2417680 | 1907-04-14 | 393.66 |
| -60 | 2418070 | 1908-05-08 | 393.03 |
| -59 | 2418440 | 1909-05-13 | 393.06 |
| -58 | 2418847 | 1910-06-24 | 393.65 |
| -57 | 2419244 | 1911-07-26 | 394.85 |
| -56 | 2419640 | 1912-08-25 | 397.46 |
| -55 | 2420029 | 1913-09-18 | 397.88 |
| -54 | 2420440 | 1914-11-03 | 397.65 |
| -53 | 2420832 | 1915-11-30 | 396.45 |
| -50 | 2422032 | 1919-03-14 | 395.49 |
| -49 | 2422448 | 1920-05-03 | 394.51 |
| -48 | 2422816 | 1921-05-06 | 393.66 |
| -47 | 2423198 | 1922-05-23 | 391.93 |
| -46 | 2423588 | 1923-06-17 | 391.2 |
| -45 | 2423977 | 1924-07-10 | 389.49 |
| -44 | 2424368 | 1925-08-05 | 390.12 |
| -43 | 2424766 | 1926-09-07 | 392.45 |
| -42 | 2425147 | 1927-09-23 | 393.64 |
| -41 | 2425553 | 1928-11-02 | 394.33 |
| -40 | 2425935 | 1929-11-19 | 394.8 |
| -39 | 2426341 | 1930-12-30 | 395.75 |
| -38 | 2426741 | 1932-02-03 | 396.13 |
| -37 | 2427133 | 1933-03-01 | 396.66 |
| -36 | 2427527 | 1934-03-30 | 396.49 |
| -35 | 2427920 | 1935-04-27 | 397.19 |
| -34 | 2428330 | 1936-06-10 | 396.83 |
| -33 | 2428719 | 1937-07-04 | 396.58 |
| -32 | 2429115 | 1938-08-04 | 395.05 |
| -31 | 2429512 | 1939-09-05 | 394.03 |
| -30 | 2429917 | 1940-10-14 | 393.02 |
| -29 | 2430308 | 1941-11-09 | 392.24 |
| -28 | 2430698 | 1942-12-04 | 392.18 |
| -27 | 2431061 | 1943-12-02 | 391.69 |
| -26 | 2431466 | 1945-01-10 | 391.25 |
| -25 | 2431860 | 1946-02-08 | 391.77 |
| -24 | 2432260 | 1947-03-15 | 392.93 |
| -23 | 2432652 | 1948-04-10 | 394.05 |
| -22 | 2433040 | 1949-05-03 | 395.17 |
| -21 | 2433430 | 1950-05-28 | 394.95 |
| -20 | 2433838 | 1951-07-10 | 395.11 |
| -19 | 2434231 | 1952-08-06 | 395.44 |
| -18 | 2434624 | 1953-09-03 | 395.52 |
| -17 | 2435019 | 1954-10-03 | 395.37 |
| -16 | 2435418 | 1955-11-06 | 395.01 |
| -15 | 2435812 | 1956-12-04 | 395.05 |
| -14 | 2436212 | 1958-01-08 | 395.24 |
| -13 | 2436597 | 1959-01-28 | 395.64 |
| -12 | 2436989 | 1960-02-24 | 396.44 |
| -11 | 2437386 | 1961-03-27 | 397.15 |
| -10 | 2437796 | 1962-05-11 | 398.39 |
| -9 | 2438183 | 1963-06-02 | 399.98 |
| -8 | 2438585 | 1964-07-08 | 401.37 |
| -7 | 2438993 | 1965-08-20 | 401.38 |
| -6 | 2439391 | 1966-09-22 | 400.61 |
| -5 | 2439798 | 1967-11-03 | 399.97 |
| -4 | 2440209 | 1968-12-18 | 400.84 |
| -3 | 2440604 | 1970-01-17 | 400.71 |
| -2 | 2440990 | 1971-02-07 | 399.69 |
| -1 | 2441381 | 1972-03-04 | 398.47 |
| 0 | 2441786 | 1973-04-13 | 396.98 |
| 1 | 2442207 | 1974-06-08 | 395.13 |
| 2 | 2442603 | 1975-07-09 | 394.12 |
| 3 | 2442985 | 1976-07-25 | 393.37 |
| 4 | 2443371 | 1977-08-15 | 392.65 |
| 5 | 2443763 | 1978-09-11 | 391.63 |
| 6 | 2444141 | 1979-09-24 | 391.13 |
| 7 | 2444535 | 1980-10-22 | 391.85 |
| 8 | 2444932 | 1981-11-23 | 392.44 |
| 9 | 2445335 | 1982-12-31 | 391.39 |
| 10 | 2445728 | 1984-01-28 | 390.86 |
| 11 | 2446123 | 1985-02-26 | 390.89 |
| 12 | 2446512 | 1986-03-22 | 391 |
| 13 | 2446895 | 1987-04-09 | 390.79 |
| 14 | 2447259 | 1988-04-07 | 391.14 |
| 15 | 2447662 | 1989-05-15 | 392.93 |
| 16 | 2448062 | 1990-06-19 | 394.85 |
| 17 | 2448470 | 1991-08-01 | 397.91 |
| 18 | 2448856 | 1992-08-21 | 399.94 |
| 19 | 2449256 | 1993-09-25 | 401.65 |
| 20 | 2449669 | 1994-11-12 | 401.33 |
| 21 | 2450067 | 1995-12-15 | 401.49 |
| 22 | 2450486 | 1997-02-06 | 401.65 |
| 23 | 2450869 | 1998-02-24 | 401.77 |
| 24 | 2451274 | 1999-04-05 | 400.78 |
| 25 | 2451668 | 2000-05-03 | 399.84 |
| 26 | 2452077 | 2001-06-16 | 399.85 |
| 27 | 2452480 | 2002-07-24 | 399.31 |
| 28 | 2452873 | 2003-08-21 | 399.52 |
| 29 | 2453266 | 2004-09-17 | 398.65 |
| 30 | 2453669 | 2005-10-25 | 398.81 |
| 31 | 2454077 | 2006-12-07 | 397.24 |
| 32 | 2454469 | 2008-01-03 | 396.71 |
| 33 | 2454863 | 2009-01-31 | 398.15 |
| 34 | 2455255 | 2010-02-27 | 397.3 |
| 35 | 2455669 | 2011-04-17 | 396.02 |
| 36 | 2456037 | 2012-04-19 | 394.87 |
| 37 | 2456443 | 2013-05-30 | 394.88 |
| 38 | 2456876 | 2014-08-06 | 394.79 |
| 39 | 2457233 | 2015-07-29 | 395.22 |
| 40 | 2457624 | 2016-08-23 | 395.25 |
| 41 | 2458015 | 2017-09-18 | 395.99 |
| 42 | 2458420 | 2018-10-28 | 395.03 |
| 43 | 2458816 | 2019-11-28 | 394.32 |
| 44 | 2459224 | 2021-01-09 | 398.32 |
| 45 | 2459617 | 2022-02-06 | 399.66 |
| 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. |