| E | O (JD) | O (dat) | Period |
| -121 | 2395637 | 1846-12-06 | 380.25 |
| -113 | 2398670 | 1855-03-27 | 380.27 |
| -111 | 2399421 | 1857-04-16 | 380.18 |
| -101 | 2403236 | 1867-09-26 | 379.94 |
| -100 | 2403616 | 1868-10-10 | 379.81 |
| -99 | 2403999 | 1869-10-28 | 379.78 |
| -98 | 2404377 | 1870-11-10 | 379.75 |
| -97 | 2404750 | 1871-11-18 | 379.87 |
| -96 | 2405116 | 1872-11-18 | 377.82 |
| -95 | 2405500 | 1873-12-07 | 377.23 |
| -94 | 2405886 | 1874-12-28 | 377.4 |
| -92 | 2406637 | 1877-01-17 | 377.97 |
| -91 | 2407034 | 1878-02-18 | 377.9 |
| -90 | 2407383 | 1879-02-02 | 377.74 |
| -89 | 2407760 | 1880-02-14 | 377.64 |
| -88 | 2408152 | 1881-03-12 | 378.87 |
| -87 | 2408535 | 1882-03-30 | 379.36 |
| -85 | 2409275 | 1884-04-08 | 378.45 |
| -77 | 2412300 | 1892-07-20 | 378.37 |
| -76 | 2412684 | 1893-08-08 | 377.76 |
| -73 | 2413866 | 1896-11-02 | 377.1 |
| -72 | 2414230 | 1897-11-01 | 376.46 |
| -69 | 2415305 | 1900-10-12 | 375.69 |
| -68 | 2415695 | 1901-11-06 | 373.53 |
| -67 | 2416060 | 1902-11-06 | 372.81 |
| -66 | 2416435 | 1903-11-16 | 372.1 |
| -65 | 2416800 | 1904-11-15 | 373.73 |
| -64 | 2417173 | 1905-11-23 | 376.04 |
| -63 | 2417563 | 1906-12-18 | 376.22 |
| -62 | 2417953 | 1908-01-12 | 376.85 |
| -61 | 2418336 | 1909-01-29 | 378.09 |
| -60 | 2418683 | 1910-01-11 | 378.31 |
| -59 | 2419062 | 1911-01-25 | 378.32 |
| -58 | 2419451 | 1912-02-18 | 377.85 |
| -57 | 2419822 | 1913-02-23 | 378.41 |
| -56 | 2420223 | 1914-03-31 | 379.54 |
| -55 | 2420583 | 1915-03-26 | 380.91 |
| -54 | 2420970 | 1916-04-16 | 380.52 |
| -53 | 2421346 | 1917-04-27 | 380.57 |
| -52 | 2421735 | 1918-05-21 | 381.64 |
| -51 | 2422114 | 1919-06-04 | 382.4 |
| -50 | 2422492 | 1920-06-16 | 383.2 |
| -49 | 2422868 | 1921-06-27 | 382.59 |
| -48 | 2423260 | 1922-07-24 | 382.1 |
| -47 | 2423655 | 1923-08-23 | 381.94 |
| -46 | 2424044 | 1924-09-15 | 381.96 |
| -45 | 2424408 | 1925-09-14 | 381.45 |
| -44 | 2424782 | 1926-09-23 | 380.41 |
| -43 | 2425160 | 1927-10-06 | 378.58 |
| -42 | 2425554 | 1928-11-03 | 377.05 |
| -41 | 2425933 | 1929-11-17 | 377.28 |
| -40 | 2426306 | 1930-11-25 | 377.85 |
| -39 | 2426679 | 1931-12-03 | 377 |
| -38 | 2427048 | 1932-12-06 | 376.25 |
| -37 | 2427420 | 1933-12-13 | 375.42 |
| -36 | 2427817 | 1935-01-14 | 375.46 |
| -35 | 2428190 | 1936-01-22 | 375.64 |
| -34 | 2428551 | 1937-01-17 | 376.29 |
| -33 | 2428933 | 1938-02-03 | 376.84 |
| -32 | 2429308 | 1939-02-13 | 377.19 |
| -31 | 2429684 | 1940-02-24 | 376.95 |
| -30 | 2430058 | 1941-03-04 | 376.74 |
| -29 | 2430446 | 1942-03-27 | 376.76 |
| -28 | 2430824 | 1943-04-09 | 376.85 |
| -27 | 2431206 | 1944-04-25 | 377.84 |
| -26 | 2431578 | 1945-05-02 | 378.48 |
| -25 | 2431934 | 1946-04-23 | 378.55 |
| -24 | 2432315 | 1947-05-09 | 378.86 |
| -23 | 2432708 | 1948-06-05 | 379.63 |
| -22 | 2433101 | 1949-07-03 | 380.33 |
| -21 | 2433477 | 1950-07-14 | 380.76 |
| -20 | 2433847 | 1951-07-19 | 380.45 |
| -19 | 2434236 | 1952-08-11 | 379.1 |
| -18 | 2434616 | 1953-08-26 | 377.15 |
| -17 | 2434995 | 1954-09-09 | 375.95 |
| -16 | 2435365 | 1955-09-14 | 375.09 |
| -15 | 2435734 | 1956-09-17 | 374.02 |
| -14 | 2436115 | 1957-10-03 | 373.15 |
| -13 | 2436481 | 1958-10-04 | 373.14 |
| -12 | 2436859 | 1959-10-17 | 373.71 |
| -11 | 2437225 | 1960-10-17 | 374.72 |
| -10 | 2437594 | 1961-10-21 | 374.95 |
| -9 | 2437978 | 1962-11-09 | 375.72 |
| -8 | 2438356 | 1963-11-22 | 377.12 |
| -7 | 2438737 | 1964-12-07 | 378.25 |
| -6 | 2439116 | 1965-12-21 | 379.76 |
| -5 | 2439479 | 1966-12-19 | 380.15 |
| -4 | 2439871 | 1968-01-15 | 380.22 |
| -3 | 2440255 | 1969-02-02 | 381.39 |
| -2 | 2440638 | 1970-02-20 | 382.65 |
| -1 | 2441024 | 1971-03-13 | 383.74 |
| 0 | 2441393 | 1972-03-16 | 384.42 |
| 1 | 2441777 | 1973-04-04 | 383.83 |
| 2 | 2442177 | 1974-05-09 | 384.59 |
| 3 | 2442565 | 1975-06-01 | 385.3 |
| 4 | 2442946 | 1976-06-16 | 385.48 |
| 5 | 2443324 | 1977-06-29 | 385.36 |
| 6 | 2443702 | 1978-07-12 | 384.52 |
| 7 | 2444106 | 1979-08-20 | 383.94 |
| 8 | 2444491 | 1980-09-08 | 383.55 |
| 9 | 2444867 | 1981-09-19 | 383.15 |
| 10 | 2445243 | 1982-09-30 | 383.02 |
| 11 | 2445628 | 1983-10-20 | 381.84 |
| 12 | 2446020 | 1984-11-15 | 380.8 |
| 13 | 2446393 | 1985-11-23 | 380.22 |
| 14 | 2446770 | 1986-12-05 | 380.02 |
| 15 | 2447160 | 1987-12-30 | 379.69 |
| 16 | 2447526 | 1988-12-30 | 379.15 |
| 17 | 2447916 | 1990-01-24 | 378.11 |
| 18 | 2448284 | 1991-01-27 | 378.11 |
| 19 | 2448666 | 1992-02-13 | 377.9 |
| 20 | 2449047 | 1993-02-28 | 377.69 |
| 21 | 2449427 | 1994-03-15 | 378.62 |
| 22 | 2449791 | 1995-03-14 | 378.37 |
| 23 | 2450176 | 1996-04-02 | 379.7 |
| 24 | 2450555 | 1997-04-16 | 379.54 |
| 25 | 2450935 | 1998-05-01 | 380.03 |
| 26 | 2451325 | 1999-05-26 | 380.82 |
| 27 | 2451693 | 2000-05-28 | 381.86 |
| 28 | 2452093 | 2001-07-02 | 381.92 |
| 29 | 2452454 | 2002-06-28 | 381.95 |
| 30 | 2452844 | 2003-07-23 | 381.95 |
| 31 | 2453229 | 2004-08-11 | 380.5 |
| 32 | 2453615 | 2005-09-01 | 379.75 |
| 33 | 2453994 | 2006-09-15 | 378.56 |
| 34 | 2454372 | 2007-09-28 | 378.66 |
| 35 | 2454756 | 2008-10-16 | 377.29 |
| 36 | 2455108 | 2009-10-03 | 376.84 |
| 37 | 2455490 | 2010-10-20 | 377.11 |
| 38 | 2455872 | 2011-11-06 | 377.24 |
| 39 | 2456256 | 2012-11-24 | 377.51 |
| 40 | 2456623 | 2013-11-26 | 377.75 |
| 41 | 2457009 | 2014-12-17 | 378.44 |
| 42 | 2457396 | 2016-01-08 | 378.25 |
| 43 | 2457763 | 2017-01-09 | 377.75 |
| 44 | 2458141 | 2018-01-22 | 377.57 |
| 45 | 2458516 | 2019-02-01 | 377.77 |
| 46 | 2458894 | 2020-02-14 | 377 |
| 47 | 2459280 | 2021-03-06 | 376.64 |
| 48 | 2459649 | 2022-03-10 | 377.86 |
| 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. |