| E | O (JD) | O (dat) | Period |
| -151 | 2389595 | 1830-05-22 | 360.9 |
| -129 | 2397603 | 1852-04-24 | 360.3 |
| -128 | 2397943 | 1853-03-30 | 359.17 |
| -127 | 2398319 | 1854-04-10 | 361.26 |
| -126 | 2398662 | 1855-03-19 | 359.97 |
| -125 | 2399013 | 1856-03-04 | 355.43 |
| -124 | 2399367 | 1857-02-21 | 356.03 |
| -123 | 2399728 | 1858-02-17 | 356.16 |
| -122 | 2400069 | 1859-01-24 | 357.44 |
| -112 | 2403652 | 1868-11-15 | 358.06 |
| -111 | 2404003 | 1869-11-01 | 358.42 |
| -110 | 2404375 | 1870-11-08 | 359.76 |
| -109 | 2404738 | 1871-11-06 | 361.77 |
| -107 | 2405458 | 1873-10-26 | 363.5 |
| -104 | 2406540 | 1876-10-12 | 364.23 |
| -103 | 2406928 | 1877-11-04 | 363.45 |
| -101 | 2407646 | 1879-10-23 | 363.57 |
| -100 | 2408006 | 1880-10-17 | 367.2 |
| -99 | 2408385 | 1881-10-31 | 367.93 |
| -98 | 2408724 | 1882-10-05 | 367.72 |
| -97 | 2409107 | 1883-10-23 | 368.43 |
| -89 | 2412071 | 1891-12-04 | 367.82 |
| -88 | 2412435 | 1892-12-02 | 367.79 |
| -87 | 2412803 | 1893-12-05 | 368.36 |
| -86 | 2413165 | 1894-12-02 | 366.14 |
| -85 | 2413525 | 1895-11-27 | 361.5 |
| -84 | 2413882 | 1896-11-18 | 360.93 |
| -83 | 2414263 | 1897-12-04 | 360.71 |
| -82 | 2414604 | 1898-11-10 | 359.79 |
| -81 | 2414963 | 1899-11-04 | 359.36 |
| -80 | 2415328 | 1900-11-04 | 359.87 |
| -79 | 2415690 | 1901-11-01 | 359.69 |
| -78 | 2416037 | 1902-10-14 | 358.25 |
| -77 | 2416401 | 1903-10-13 | 356.94 |
| -75 | 2417142 | 1905-10-23 | 356.87 |
| -74 | 2417480 | 1906-09-26 | 357.44 |
| -73 | 2417819 | 1907-08-31 | 355.75 |
| -72 | 2418183 | 1908-08-29 | 351.73 |
| -71 | 2418545 | 1909-08-26 | 350.64 |
| -70 | 2418901 | 1910-08-17 | 353.64 |
| -69 | 2419229 | 1911-07-11 | 353.5 |
| -68 | 2419590 | 1912-07-06 | 352.36 |
| -67 | 2419941 | 1913-06-22 | 351.43 |
| -66 | 2420309 | 1914-06-25 | 351.93 |
| -65 | 2420642 | 1915-05-24 | 353.43 |
| -64 | 2421019 | 1916-06-04 | 353.57 |
| -63 | 2421347 | 1917-04-28 | 353.57 |
| -62 | 2421710 | 1918-04-26 | 354.57 |
| -61 | 2422057 | 1919-04-08 | 355.43 |
| -60 | 2422424 | 1920-04-09 | 357.57 |
| -59 | 2422776 | 1921-03-27 | 361.14 |
| -58 | 2423139 | 1922-03-25 | 362.71 |
| -57 | 2423498 | 1923-03-19 | 365.14 |
| -56 | 2423874 | 1924-03-29 | 367.86 |
| -55 | 2424239 | 1925-03-29 | 370.07 |
| -54 | 2424606 | 1926-03-31 | 371.5 |
| -53 | 2424987 | 1927-04-16 | 371.5 |
| -52 | 2425363 | 1928-04-26 | 371.5 |
| -51 | 2425733 | 1929-05-01 | 372.79 |
| -50 | 2426105 | 1930-05-08 | 372.21 |
| -49 | 2426468 | 1931-05-06 | 370.29 |
| -48 | 2426846 | 1932-05-18 | 369.71 |
| -47 | 2427218 | 1933-05-25 | 369.14 |
| -46 | 2427586 | 1934-05-28 | 368.43 |
| -45 | 2427948 | 1935-05-25 | 368.36 |
| -44 | 2428324 | 1936-06-04 | 366.57 |
| -43 | 2428682 | 1937-05-28 | 364.86 |
| -42 | 2429049 | 1938-05-30 | 363.93 |
| -41 | 2429422 | 1939-06-07 | 362.79 |
| -40 | 2429774 | 1940-05-24 | 362 |
| -39 | 2430138 | 1941-05-23 | 361.36 |
| -38 | 2430491 | 1942-05-11 | 360.43 |
| -37 | 2430860 | 1943-05-15 | 360.57 |
| -36 | 2431214 | 1944-05-03 | 361 |
| -35 | 2431576 | 1945-04-30 | 361.71 |
| -34 | 2431941 | 1946-04-30 | 362.07 |
| -33 | 2432303 | 1947-04-27 | 363.07 |
| -32 | 2432663 | 1948-04-21 | 364.36 |
| -31 | 2433030 | 1949-04-23 | 364.64 |
| -30 | 2433390 | 1950-04-18 | 364.79 |
| -29 | 2433767 | 1951-04-30 | 364.36 |
| -28 | 2434124 | 1952-04-21 | 363.93 |
| -27 | 2434498 | 1953-04-30 | 364.14 |
| -26 | 2434853 | 1954-04-20 | 363.21 |
| -25 | 2435214 | 1955-04-16 | 361.64 |
| -24 | 2435574 | 1956-04-10 | 360.57 |
| -23 | 2435944 | 1957-04-15 | 359.57 |
| -22 | 2436298 | 1958-04-04 | 359.79 |
| -21 | 2436656 | 1959-03-28 | 359.43 |
| -20 | 2437014 | 1960-03-20 | 358.36 |
| -19 | 2437371 | 1961-03-12 | 357.79 |
| -18 | 2437733 | 1962-03-09 | 357.64 |
| -17 | 2438087 | 1963-02-26 | 357.29 |
| -16 | 2438448 | 1964-02-22 | 357.36 |
| -15 | 2438803 | 1965-02-11 | 357.64 |
| -14 | 2439158 | 1966-02-01 | 357.57 |
| -13 | 2439514 | 1967-01-23 | 357.36 |
| -12 | 2439874 | 1968-01-18 | 358.93 |
| -11 | 2440237 | 1969-01-15 | 360.86 |
| -10 | 2440589 | 1970-01-02 | 362.21 |
| -9 | 2440949 | 1970-12-28 | 363.57 |
| -8 | 2441327 | 1972-01-10 | 363.71 |
| -7 | 2441686 | 1973-01-03 | 364.5 |
| -6 | 2442057 | 1974-01-09 | 365.86 |
| -5 | 2442421 | 1975-01-08 | 364.64 |
| -4 | 2442782 | 1976-01-04 | 363.21 |
| -3 | 2443147 | 1977-01-03 | 363.14 |
| -2 | 2443513 | 1978-01-04 | 362.57 |
| -1 | 2443868 | 1978-12-25 | 362.71 |
| 0 | 2444230 | 1979-12-22 | 362.5 |
| 1 | 2444597 | 1980-12-23 | 361.71 |
| 2 | 2444957 | 1981-12-18 | 362.36 |
| 3 | 2445324 | 1982-12-20 | 362.71 |
| 4 | 2445680 | 1983-12-11 | 362.43 |
| 5 | 2446044 | 1984-12-09 | 362 |
| 6 | 2446410 | 1985-12-10 | 361.21 |
| 7 | 2446766 | 1986-12-01 | 361.5 |
| 8 | 2447135 | 1987-12-05 | 361.57 |
| 9 | 2447487 | 1988-11-21 | 361.43 |
| 10 | 2447851 | 1989-11-20 | 362.36 |
| 11 | 2448214 | 1990-11-18 | 362.5 |
| 12 | 2448572 | 1991-11-11 | 362.57 |
| 13 | 2448942 | 1992-11-15 | 362.71 |
| 14 | 2449307 | 1993-11-15 | 362 |
| 15 | 2449669 | 1994-11-12 | 362.57 |
| 16 | 2450029 | 1995-11-07 | 362.71 |
| 17 | 2450387 | 1996-10-30 | 362.43 |
| 18 | 2450746 | 1997-10-24 | 362.86 |
| 19 | 2451116 | 1998-10-29 | 362.57 |
| 20 | 2451476 | 1999-10-24 | 362 |
| 21 | 2451847 | 2000-10-29 | 361.21 |
| 22 | 2452209 | 2001-10-26 | 359.93 |
| 23 | 2452565 | 2002-10-17 | 358.57 |
| 24 | 2452919 | 2003-10-06 | 357.07 |
| 25 | 2453271 | 2004-09-22 | 356.14 |
| 26 | 2453630 | 2005-09-16 | 356.64 |
| 27 | 2453982 | 2006-09-03 | 358.21 |
| 28 | 2454340 | 2007-08-27 | 358.36 |
| 29 | 2454702 | 2008-08-23 | 358.21 |
| 30 | 2455065 | 2009-08-21 | 360 |
| 31 | 2455434 | 2010-08-25 | 361.43 |
| 32 | 2455773 | 2011-07-30 | 362 |
| 33 | 2456143 | 2012-08-03 | 362.21 |
| 34 | 2456509 | 2013-08-04 | 360.93 |
| 35 | 2456873 | 2014-08-03 | 362.57 |
| 36 | 2457237 | 2015-08-02 | 365.93 |
| 37 | 2457601 | 2016-07-31 | 364.86 |
| 38 | 2457951 | 2017-07-16 | 364.14 |
| 39 | 2458332 | 2018-08-01 | 365.36 |
| 40 | 2458707 | 2019-08-11 | 365.52 |
| 41 | 2459053 | 2020-07-22 | 367.83 |
| 42 | 2459427 | 2021-07-31 | 368.25 |
| 43 | 2459798 | 2022-08-06 | 365.7 |
| 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. |