| E | O (JD) | O (dat) | Period |
| -90 | 2399971 | 1858-10-18 | 486.38 |
| -88 | 2400934 | 1861-06-07 | 487 |
| -87 | 2401440 | 1862-10-26 | 487.28 |
| -86 | 2401894 | 1864-01-23 | 488.47 |
| -82 | 2403868 | 1869-06-19 | 488.52 |
| -81 | 2404340 | 1870-10-04 | 488.68 |
| -80 | 2404842 | 1872-02-18 | 488.5 |
| -76 | 2406789 | 1877-06-18 | 488.19 |
| -74 | 2407794 | 1880-03-19 | 487.97 |
| -73 | 2408265 | 1881-07-03 | 486.1 |
| -72 | 2408760 | 1882-11-10 | 484.5 |
| -71 | 2409217 | 1884-02-10 | 482.71 |
| -70 | 2409711 | 1885-06-18 | 480.46 |
| -69 | 2410174 | 1886-09-24 | 479.99 |
| -68 | 2410648 | 1888-01-11 | 481.19 |
| -67 | 2411114 | 1889-04-21 | 482.3 |
| -66 | 2411628 | 1890-09-17 | 484.45 |
| -65 | 2412111 | 1892-01-13 | 488.13 |
| -64 | 2412610 | 1893-05-26 | 490.95 |
| -63 | 2413080 | 1894-09-08 | 492.29 |
| -62 | 2413570 | 1896-01-11 | 492.48 |
| -61 | 2414060 | 1897-05-15 | 491.33 |
| -60 | 2414605 | 1898-11-11 | 491.1 |
| -59 | 2415071 | 1900-02-20 | 491.91 |
| -58 | 2415555 | 1901-06-19 | 494.43 |
| -57 | 2416037 | 1902-10-14 | 494.76 |
| -56 | 2416526 | 1904-02-15 | 493.67 |
| -55 | 2417012 | 1905-06-15 | 491.83 |
| -54 | 2417532 | 1906-11-17 | 493.3 |
| -53 | 2418055 | 1908-04-23 | 492.02 |
| -52 | 2418532 | 1909-08-13 | 490.82 |
| -51 | 2419003 | 1910-11-27 | 490.16 |
| -50 | 2419485 | 1912-03-23 | 488.45 |
| -49 | 2419989 | 1913-08-09 | 485.01 |
| -48 | 2420446 | 1914-11-09 | 483.55 |
| -47 | 2420942 | 1916-03-19 | 483.05 |
| -46 | 2421453 | 1917-08-12 | 481.82 |
| -45 | 2421926 | 1918-11-28 | 480.61 |
| -44 | 2422385 | 1920-03-01 | 477.97 |
| -43 | 2422879 | 1921-07-08 | 478.76 |
| -42 | 2423342 | 1922-10-14 | 477.19 |
| -41 | 2423811 | 1924-01-26 | 475.97 |
| -40 | 2424302 | 1925-05-31 | 477.8 |
| -39 | 2424752 | 1926-08-24 | 478.46 |
| -38 | 2425276 | 1928-01-30 | 479.2 |
| -37 | 2425733 | 1929-05-01 | 481.69 |
| -36 | 2426203 | 1930-08-14 | 483.58 |
| -35 | 2426709 | 1932-01-02 | 485.6 |
| -34 | 2427167 | 1933-04-04 | 487.36 |
| -33 | 2427666 | 1934-08-16 | 490.1 |
| -32 | 2428168 | 1935-12-31 | 492.91 |
| -31 | 2428657 | 1937-05-03 | 494 |
| -30 | 2429160 | 1938-09-18 | 495.72 |
| -29 | 2429635 | 1940-01-06 | 496.49 |
| -28 | 2430183 | 1941-07-07 | 495.27 |
| -27 | 2430642 | 1942-10-09 | 494.34 |
| -26 | 2431129 | 1944-02-08 | 494.01 |
| -25 | 2431658 | 1945-07-21 | 493.2 |
| -24 | 2432121 | 1946-10-27 | 492.35 |
| -23 | 2432610 | 1948-02-28 | 489.78 |
| -22 | 2433106 | 1949-07-08 | 490.39 |
| -21 | 2433605 | 1950-11-19 | 489.43 |
| -20 | 2434095 | 1952-03-23 | 488.02 |
| -19 | 2434578 | 1953-07-19 | 488.84 |
| -18 | 2435054 | 1954-11-07 | 487.61 |
| -17 | 2435550 | 1956-03-17 | 485.36 |
| -16 | 2436038 | 1957-07-18 | 483.57 |
| -15 | 2436523 | 1958-11-15 | 482.79 |
| -14 | 2437016 | 1960-03-22 | 482.3 |
| -13 | 2437487 | 1961-07-06 | 481.93 |
| -12 | 2437951 | 1962-10-13 | 481.05 |
| -11 | 2438434 | 1964-02-08 | 482.57 |
| -10 | 2438923 | 1965-06-11 | 483.66 |
| -9 | 2439405 | 1966-10-06 | 483.88 |
| -8 | 2439890 | 1968-02-03 | 485.95 |
| -7 | 2440370 | 1969-05-28 | 486.77 |
| -6 | 2440891 | 1970-10-31 | 486.75 |
| -5 | 2441364 | 1972-02-16 | 486.95 |
| -4 | 2441828 | 1973-05-25 | 487.09 |
| -3 | 2442338 | 1974-10-17 | 486.53 |
| -2 | 2442810 | 1976-02-01 | 486.74 |
| -1 | 2443299 | 1977-06-04 | 486.76 |
| 0 | 2443794 | 1978-10-12 | 487.58 |
| 1 | 2444278 | 1980-02-08 | 489 |
| 2 | 2444755 | 1981-05-30 | 488.45 |
| 3 | 2445260 | 1982-10-17 | 488.47 |
| 4 | 2445754 | 1984-02-23 | 487.45 |
| 5 | 2446223 | 1985-06-06 | 486.72 |
| 6 | 2446735 | 1986-10-31 | 486.1 |
| 7 | 2447209 | 1988-02-17 | 485.31 |
| 8 | 2447686 | 1989-06-08 | 484.46 |
| 9 | 2448166 | 1990-10-01 | 483.79 |
| 10 | 2448657 | 1992-02-04 | 483.92 |
| 11 | 2449137 | 1993-05-29 | 482.02 |
| 12 | 2449621 | 1994-09-25 | 482 |
| 13 | 2450116 | 1996-02-02 | 481.45 |
| 14 | 2450586 | 1997-05-17 | 480.97 |
| 15 | 2451076 | 1998-09-19 | 479.95 |
| 16 | 2451533 | 1999-12-20 | 479.36 |
| 17 | 2452022 | 2001-04-22 | 479.33 |
| 18 | 2452499 | 2002-08-12 | 478.08 |
| 19 | 2452986 | 2003-12-12 | 479.35 |
| 20 | 2453458 | 2005-03-28 | 480.09 |
| 21 | 2453937 | 2006-07-20 | 481.05 |
| 22 | 2454429 | 2007-11-24 | 481.65 |
| 23 | 2454880 | 2009-02-17 | 483.63 |
| 24 | 2455393 | 2010-07-15 | 483.86 |
| 25 | 2455873 | 2011-11-07 | 484.24 |
| 26 | 2456347 | 2013-02-23 | 484.54 |
| 27 | 2456845 | 2014-07-06 | 484.37 |
| 28 | 2457351 | 2015-11-24 | 484.18 |
| 29 | 2457806 | 2017-02-21 | 482.75 |
| 30 | 2458286 | 2018-06-16 | 482.65 |
| 31 | 2458778 | 2019-10-21 | 482.17 |
| 32 | 2459257 | 2021-02-11 | 479.96 |
| 33 | 2459730 | 2022-05-30 | 478.29 |
| 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. |