| E | O (JD) | O (dat) | Period |
| -121 | 2398572 | 1854-12-19 | 371.71 |
| -120 | 2398937 | 1855-12-19 | 369.59 |
| -119 | 2399298 | 1856-12-14 | 369.1 |
| -118 | 2399688 | 1858-01-08 | 371.73 |
| -117 | 2400053 | 1859-01-08 | 372.06 |
| -116 | 2400412 | 1860-01-02 | 371.33 |
| -114 | 2401160 | 1862-01-19 | 371.94 |
| -113 | 2401552 | 1863-02-15 | 372.55 |
| -111 | 2402282 | 1865-02-14 | 371.44 |
| -110 | 2402637 | 1866-02-04 | 372.89 |
| -109 | 2403044 | 1867-03-18 | 372.32 |
| -108 | 2403403 | 1868-03-11 | 371.2 |
| -107 | 2403748 | 1869-02-19 | 373.28 |
| -106 | 2404163 | 1870-04-10 | 370.57 |
| -105 | 2404506 | 1871-03-19 | 367.78 |
| -104 | 2404896 | 1872-04-12 | 369.06 |
| -103 | 2405249 | 1873-03-31 | 368.81 |
| -102 | 2405620 | 1874-04-06 | 368.59 |
| -101 | 2405976 | 1875-03-28 | 369.07 |
| -99 | 2406711 | 1877-04-01 | 369 |
| -98 | 2407101 | 1878-04-26 | 368.6 |
| -96 | 2407834 | 1880-04-28 | 369.2 |
| -95 | 2408211 | 1881-05-10 | 370.2 |
| -93 | 2408945 | 1883-05-14 | 369.05 |
| -92 | 2409296 | 1884-04-29 | 369.04 |
| -91 | 2409684 | 1885-05-22 | 369.13 |
| -89 | 2410407 | 1887-05-15 | 369.03 |
| -87 | 2411155 | 1889-06-01 | 370.79 |
| -83 | 2412637 | 1893-06-22 | 370.56 |
| -77 | 2414851 | 1899-07-15 | 369.56 |
| -75 | 2415590 | 1901-07-24 | 369.57 |
| -73 | 2416370 | 1903-09-12 | 369.27 |
| -71 | 2417062 | 1905-08-04 | 370.44 |
| -70 | 2417442 | 1906-08-19 | 371 |
| -69 | 2417794 | 1907-08-06 | 368.53 |
| -68 | 2418184 | 1908-08-30 | 368.86 |
| -67 | 2418565 | 1909-09-15 | 369.71 |
| -66 | 2418925 | 1910-09-10 | 370.57 |
| -65 | 2419300 | 1911-09-20 | 371 |
| -64 | 2419665 | 1912-09-19 | 369.28 |
| -63 | 2420015 | 1913-09-04 | 368.57 |
| -62 | 2420409 | 1914-10-03 | 369.43 |
| -61 | 2420763 | 1915-09-22 | 370.58 |
| -60 | 2421156 | 1916-10-19 | 370.65 |
| -59 | 2421494 | 1917-09-22 | 370.5 |
| -58 | 2421903 | 1918-11-05 | 369.64 |
| -57 | 2422250 | 1919-10-18 | 369.85 |
| -56 | 2422619 | 1920-10-21 | 370.78 |
| -55 | 2422992 | 1921-10-29 | 369 |
| -54 | 2423355 | 1922-10-27 | 369.07 |
| -53 | 2423742 | 1923-11-18 | 371.28 |
| -52 | 2424099 | 1924-11-09 | 370.93 |
| -51 | 2424464 | 1925-11-09 | 371.37 |
| -50 | 2424856 | 1926-12-06 | 370.72 |
| -49 | 2425211 | 1927-11-26 | 370.94 |
| -48 | 2425593 | 1928-12-12 | 372.15 |
| -47 | 2425953 | 1929-12-07 | 370.92 |
| -46 | 2426334 | 1930-12-23 | 370.28 |
| -45 | 2426700 | 1931-12-24 | 370.85 |
| -44 | 2427073 | 1932-12-31 | 371.42 |
| -43 | 2427440 | 1934-01-02 | 369 |
| -42 | 2427811 | 1935-01-08 | 367.85 |
| -41 | 2428185 | 1936-01-17 | 370.22 |
| -40 | 2428561 | 1937-01-27 | 368.51 |
| -39 | 2428892 | 1937-12-24 | 367.44 |
| -38 | 2429292 | 1939-01-28 | 367.22 |
| -37 | 2429664 | 1940-02-04 | 366.5 |
| -36 | 2430008 | 1941-01-13 | 367.92 |
| -35 | 2430387 | 1942-01-27 | 367.71 |
| -34 | 2430750 | 1943-01-25 | 365.35 |
| -33 | 2431127 | 1944-02-06 | 367.21 |
| -32 | 2431477 | 1945-01-21 | 367.64 |
| -31 | 2431855 | 1946-02-03 | 367.65 |
| -30 | 2432216 | 1947-01-30 | 367.08 |
| -29 | 2432597 | 1948-02-15 | 368.22 |
| -28 | 2432945 | 1949-01-28 | 371.36 |
| -27 | 2433339 | 1950-02-26 | 371.64 |
| -26 | 2433677 | 1951-01-30 | 369.71 |
| -25 | 2434082 | 1952-03-10 | 370 |
| -24 | 2434449 | 1953-03-12 | 370.64 |
| -23 | 2434825 | 1954-03-23 | 370.57 |
| -22 | 2435164 | 1955-02-25 | 370.35 |
| -21 | 2435558 | 1956-03-25 | 368.07 |
| -20 | 2435915 | 1957-03-17 | 366.65 |
| -19 | 2436289 | 1958-03-26 | 368.07 |
| -18 | 2436655 | 1959-03-27 | 367.78 |
| -17 | 2437029 | 1960-04-04 | 366.21 |
| -16 | 2437378 | 1961-03-19 | 368.14 |
| -15 | 2437764 | 1962-04-09 | 369.14 |
| -14 | 2438107 | 1963-03-18 | 368.64 |
| -13 | 2438493 | 1964-04-07 | 369.57 |
| -12 | 2438865 | 1965-04-14 | 370.86 |
| -11 | 2439247 | 1966-05-01 | 370.87 |
| -10 | 2439598 | 1967-04-17 | 371.65 |
| -9 | 2439983 | 1968-05-06 | 371.65 |
| -8 | 2440351 | 1969-05-09 | 372 |
| -7 | 2440712 | 1970-05-05 | 372.35 |
| -6 | 2441091 | 1971-05-19 | 372.64 |
| -5 | 2441470 | 1972-06-01 | 373.78 |
| -4 | 2441850 | 1973-06-16 | 373.92 |
| -3 | 2442208 | 1974-06-09 | 374.07 |
| -2 | 2442590 | 1975-06-26 | 374 |
| -1 | 2442977 | 1976-07-17 | 371.65 |
| 0 | 2443321 | 1977-06-26 | 371.65 |
| 1 | 2443719 | 1978-07-29 | 370.44 |
| 2 | 2444078 | 1979-07-23 | 369.15 |
| 3 | 2444445 | 1980-07-24 | 370.07 |
| 4 | 2444816 | 1981-07-30 | 368.14 |
| 5 | 2445168 | 1982-07-17 | 368.35 |
| 6 | 2445567 | 1983-08-20 | 370.71 |
| 7 | 2445912 | 1984-07-30 | 371.14 |
| 8 | 2446282 | 1985-08-04 | 373.28 |
| 9 | 2446672 | 1986-08-29 | 373.22 |
| 10 | 2447041 | 1987-09-02 | 372.65 |
| 11 | 2447416 | 1988-09-11 | 374.65 |
| 12 | 2447794 | 1989-09-24 | 373 |
| 13 | 2448166 | 1990-10-01 | 371.57 |
| 14 | 2448530 | 1991-09-30 | 371.35 |
| 15 | 2448909 | 1992-10-13 | 369.57 |
| 16 | 2449267 | 1993-10-06 | 369.57 |
| 17 | 2449648 | 1994-10-22 | 369.5 |
| 18 | 2450008 | 1995-10-17 | 368.21 |
| 19 | 2450376 | 1996-10-19 | 367.93 |
| 20 | 2450758 | 1997-11-05 | 367.8 |
| 21 | 2451111 | 1998-10-24 | 367.01 |
| 22 | 2451483 | 1999-10-31 | 367.72 |
| 23 | 2451844 | 2000-10-26 | 368.35 |
| 24 | 2452220 | 2001-11-06 | 369.07 |
| 25 | 2452574 | 2002-10-26 | 370.35 |
| 26 | 2452958 | 2003-11-14 | 370.42 |
| 27 | 2453333 | 2004-11-23 | 370.78 |
| 28 | 2453703 | 2005-11-28 | 371.92 |
| 29 | 2454076 | 2006-12-06 | 371.79 |
| 30 | 2454437 | 2007-12-02 | 371.8 |
| 31 | 2454818 | 2008-12-17 | 371.5 |
| 32 | 2455183 | 2009-12-17 | 372.78 |
| 33 | 2455554 | 2010-12-23 | 374.78 |
| 34 | 2455942 | 2012-01-15 | 373.14 |
| 35 | 2456295 | 2013-01-02 | 373.5 |
| 36 | 2456703 | 2014-02-14 | 373.92 |
| 37 | 2457057 | 2015-02-03 | 372.85 |
| 38 | 2457422 | 2016-02-03 | 373.79 |
| 39 | 2457808 | 2017-02-23 | 370.65 |
| 40 | 2458164 | 2018-02-14 | 369.51 |
| 41 | 2458552 | 2019-03-09 | 372.79 |
| 42 | 2458918 | 2020-03-09 | 370.98 |
| 43 | 2459269 | 2021-02-23 | 371.59 |
| 44 | 2459664 | 2022-03-25 | 374.71 |
| 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. |