| E | O (JD) | O (dat) | Period |
| -77 | 2410349 | 1887-03-18 | 393.12 |
| -74 | 2411532 | 1890-06-13 | 392.52 |
| -69 | 2413500 | 1895-11-02 | 391.51 |
| -68 | 2413890 | 1896-11-26 | 391.23 |
| -67 | 2414290 | 1897-12-31 | 390.48 |
| -66 | 2414666 | 1899-01-11 | 389.71 |
| -65 | 2415053 | 1900-02-02 | 388.18 |
| -64 | 2415426 | 1901-02-10 | 386.27 |
| -63 | 2415830 | 1902-03-21 | 386.77 |
| -62 | 2416200 | 1903-03-26 | 387.17 |
| -61 | 2416580 | 1904-04-09 | 388.52 |
| -60 | 2416990 | 1905-05-24 | 388.71 |
| -59 | 2417375 | 1906-06-13 | 391.08 |
| -58 | 2417771 | 1907-07-14 | 391.25 |
| -57 | 2418155 | 1908-08-01 | 392.18 |
| -54 | 2419324 | 1911-10-14 | 392.71 |
| -53 | 2419703 | 1912-10-27 | 393.04 |
| -49 | 2421310 | 1917-03-22 | 393.68 |
| -48 | 2421680 | 1918-03-27 | 394.41 |
| -47 | 2422086 | 1919-05-07 | 395.53 |
| -46 | 2422487 | 1920-06-11 | 396.82 |
| -45 | 2422889 | 1921-07-18 | 397.75 |
| -44 | 2423278 | 1922-08-11 | 397.76 |
| -43 | 2423681 | 1923-09-18 | 399.2 |
| -42 | 2424079 | 1924-10-20 | 399.11 |
| -41 | 2424475 | 1925-11-20 | 399.3 |
| -40 | 2424879 | 1926-12-29 | 399.29 |
| -39 | 2425273 | 1928-01-27 | 399.35 |
| -38 | 2425683 | 1929-03-12 | 398.49 |
| -37 | 2426080 | 1930-04-13 | 397.63 |
| -36 | 2426479 | 1931-05-17 | 396.45 |
| -35 | 2426872 | 1932-06-13 | 394.74 |
| -34 | 2427268 | 1933-07-14 | 393.76 |
| -33 | 2427657 | 1934-08-07 | 392.42 |
| -32 | 2428049 | 1935-09-03 | 391.22 |
| -31 | 2428438 | 1936-09-26 | 389.78 |
| -30 | 2428823 | 1937-10-16 | 388.92 |
| -29 | 2429224 | 1938-11-21 | 388.32 |
| -28 | 2429612 | 1939-12-14 | 388.85 |
| -27 | 2429991 | 1940-12-27 | 389.66 |
| -26 | 2430371 | 1942-01-11 | 390.58 |
| -25 | 2430763 | 1943-02-07 | 391.35 |
| -24 | 2431154 | 1944-03-04 | 392.05 |
| -23 | 2431560 | 1945-04-14 | 393.63 |
| -22 | 2431958 | 1946-05-17 | 395.34 |
| -21 | 2432350 | 1947-06-13 | 396.62 |
| -20 | 2432740 | 1948-07-07 | 397.46 |
| -19 | 2433137 | 1949-08-08 | 397.67 |
| -18 | 2433538 | 1950-09-13 | 397.98 |
| -17 | 2433938 | 1951-10-18 | 398.65 |
| -16 | 2434339 | 1952-11-22 | 399.46 |
| -15 | 2434743 | 1953-12-31 | 400.19 |
| -14 | 2435133 | 1955-01-25 | 400.35 |
| -13 | 2435540 | 1956-03-07 | 400.78 |
| -12 | 2435938 | 1957-04-09 | 400.69 |
| -11 | 2436339 | 1958-05-15 | 399.94 |
| -10 | 2436743 | 1959-06-23 | 399.11 |
| -9 | 2437141 | 1960-07-25 | 398.79 |
| -8 | 2437551 | 1961-09-08 | 397.91 |
| -7 | 2437941 | 1962-10-03 | 397.15 |
| -6 | 2438327 | 1963-10-24 | 396.04 |
| -5 | 2438722 | 1964-11-22 | 394.75 |
| -4 | 2439125 | 1965-12-30 | 394.05 |
| -3 | 2439521 | 1967-01-30 | 393.27 |
| -2 | 2439913 | 1968-02-26 | 393.57 |
| -1 | 2440302 | 1969-03-21 | 393.23 |
| 0 | 2440690 | 1970-04-13 | 392.31 |
| 1 | 2441088 | 1971-05-16 | 391.88 |
| 2 | 2441478 | 1972-06-09 | 392.05 |
| 3 | 2441877 | 1973-07-13 | 392.34 |
| 4 | 2442260 | 1974-07-31 | 392.42 |
| 5 | 2442648 | 1975-08-23 | 392.08 |
| 6 | 2443049 | 1976-09-27 | 391.12 |
| 7 | 2443444 | 1977-10-27 | 390.76 |
| 8 | 2443835 | 1978-11-22 | 389.87 |
| 9 | 2444223 | 1979-12-15 | 389.3 |
| 10 | 2444609 | 1981-01-04 | 388.25 |
| 11 | 2444991 | 1982-01-21 | 386.83 |
| 12 | 2445387 | 1983-02-21 | 386.49 |
| 13 | 2445767 | 1984-03-07 | 386.76 |
| 14 | 2446153 | 1985-03-28 | 387.26 |
| 15 | 2446538 | 1986-04-17 | 387.89 |
| 16 | 2446920 | 1987-05-04 | 388.52 |
| 17 | 2447317 | 1988-06-04 | 388.8 |
| 18 | 2447710 | 1989-07-02 | 389.67 |
| 19 | 2448099 | 1990-07-26 | 390.75 |
| 20 | 2448489 | 1991-08-20 | 391.91 |
| 21 | 2448879 | 1992-09-13 | 392.95 |
| 22 | 2449267 | 1993-10-06 | 394.29 |
| 23 | 2449660 | 1994-11-03 | 395.46 |
| 24 | 2450063 | 1995-12-11 | 396.5 |
| 25 | 2450461 | 1997-01-12 | 398.04 |
| 26 | 2450858 | 1998-02-13 | 398.95 |
| 27 | 2451270 | 1999-04-01 | 399.69 |
| 28 | 2451660 | 2000-04-25 | 399.66 |
| 29 | 2452054 | 2001-05-24 | 399.09 |
| 30 | 2452467 | 2002-07-11 | 398.24 |
| 31 | 2452859 | 2003-08-07 | 397.28 |
| 32 | 2453261 | 2004-09-12 | 395.93 |
| 33 | 2453655 | 2005-10-11 | 395.52 |
| 34 | 2454049 | 2006-11-09 | 394.61 |
| 35 | 2454437 | 2007-12-02 | 393.91 |
| 36 | 2454832 | 2008-12-31 | 394.43 |
| 37 | 2455221 | 2010-01-24 | 395.02 |
| 38 | 2455620 | 2011-02-27 | 395.69 |
| 39 | 2456011 | 2012-03-24 | 396.38 |
| 40 | 2456413 | 2013-04-30 | 397.15 |
| 41 | 2456816 | 2014-06-07 | 397.18 |
| 42 | 2457217 | 2015-07-13 | 396.79 |
| 43 | 2457608 | 2016-08-07 | 396.35 |
| 44 | 2458005 | 2017-09-08 | 396.16 |
| 45 | 2458404 | 2018-10-12 | 395.38 |
| 46 | 2458793 | 2019-11-05 | 394.56 |
| 47 | 2459181 | 2020-11-27 | 394 |
| 48 | 2459583 | 2022-01-03 | 394.06 |
| 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. |