| E | O (JD) | O (dat) | Period |
| -109 | 2401912 | 1864-02-10 | 364.68 |
| -108 | 2402272 | 1865-02-04 | 366.82 |
| -104 | 2403724 | 1869-01-26 | 367.02 |
| -103 | 2404094 | 1870-01-31 | 366.96 |
| -99 | 2405561 | 1874-02-06 | 367.02 |
| -95 | 2407012 | 1878-01-27 | 366.74 |
| -80 | 2412548 | 1893-03-25 | 366.97 |
| -76 | 2414013 | 1897-03-29 | 367.02 |
| -75 | 2414370 | 1898-03-21 | 366.96 |
| -69 | 2416580 | 1904-04-09 | 366.89 |
| -68 | 2416910 | 1905-03-05 | 366.73 |
| -67 | 2417316 | 1906-04-15 | 365.5 |
| -66 | 2417660 | 1907-03-25 | 365.84 |
| -65 | 2418030 | 1908-03-29 | 366.45 |
| -64 | 2418390 | 1909-03-24 | 365.7 |
| -63 | 2418750 | 1910-03-19 | 366.43 |
| -62 | 2419140 | 1911-04-13 | 365.27 |
| -61 | 2419504 | 1912-04-11 | 365.99 |
| -60 | 2419870 | 1913-04-12 | 366.33 |
| -58 | 2420577 | 1915-03-20 | 366.23 |
| -57 | 2420960 | 1916-04-06 | 365.89 |
| -55 | 2421685 | 1918-04-01 | 365.21 |
| -53 | 2422422 | 1920-04-07 | 365.4 |
| -52 | 2422800 | 1921-04-20 | 365.86 |
| -51 | 2423153 | 1922-04-08 | 366.48 |
| -50 | 2423517 | 1923-04-07 | 365.87 |
| -49 | 2423880 | 1924-04-04 | 365.88 |
| -48 | 2424247 | 1925-04-06 | 365.35 |
| -47 | 2424620 | 1926-04-14 | 365.07 |
| -46 | 2424985 | 1927-04-14 | 365.61 |
| -45 | 2425350 | 1928-04-13 | 365.78 |
| -44 | 2425713 | 1929-04-11 | 365.63 |
| -43 | 2426076 | 1930-04-09 | 365.57 |
| -42 | 2426440 | 1931-04-08 | 366.17 |
| -41 | 2426808 | 1932-04-10 | 367.36 |
| -40 | 2427178 | 1933-04-15 | 368.2 |
| -39 | 2427539 | 1934-04-11 | 369.65 |
| -38 | 2427910 | 1935-04-17 | 370.45 |
| -37 | 2428290 | 1936-05-01 | 370.26 |
| -36 | 2428664 | 1937-05-10 | 370.19 |
| -35 | 2429027 | 1938-05-08 | 369.79 |
| -34 | 2429411 | 1939-05-27 | 369.98 |
| -33 | 2429773 | 1940-05-23 | 369.26 |
| -32 | 2430128 | 1941-05-13 | 368.36 |
| -31 | 2430504 | 1942-05-24 | 368.28 |
| -30 | 2430868 | 1943-05-23 | 368.6 |
| -29 | 2431249 | 1944-06-07 | 368.19 |
| -28 | 2431610 | 1945-06-03 | 368.45 |
| -27 | 2431975 | 1946-06-03 | 368.41 |
| -26 | 2432350 | 1947-06-13 | 368.05 |
| -25 | 2432722 | 1948-06-19 | 367.96 |
| -24 | 2433082 | 1949-06-14 | 367.45 |
| -23 | 2433447 | 1950-06-14 | 367.54 |
| -22 | 2433813 | 1951-06-15 | 367.35 |
| -21 | 2434188 | 1952-06-24 | 367.04 |
| -20 | 2434555 | 1953-06-26 | 366.95 |
| -19 | 2434919 | 1954-06-25 | 367.01 |
| -18 | 2435285 | 1955-06-26 | 366.78 |
| -17 | 2435653 | 1956-06-28 | 366.11 |
| -16 | 2436021 | 1957-07-01 | 365.15 |
| -15 | 2436385 | 1958-06-30 | 364.71 |
| -14 | 2436749 | 1959-06-29 | 363.81 |
| -13 | 2437116 | 1960-06-30 | 363.24 |
| -12 | 2437475 | 1961-06-24 | 363 |
| -11 | 2437835 | 1962-06-19 | 363.18 |
| -10 | 2438201 | 1963-06-20 | 364.05 |
| -9 | 2438553 | 1964-06-06 | 364.81 |
| -8 | 2438923 | 1965-06-11 | 365.7 |
| -7 | 2439292 | 1966-06-15 | 367.15 |
| -6 | 2439661 | 1967-06-19 | 368.15 |
| -5 | 2440036 | 1968-06-28 | 368.93 |
| -4 | 2440400 | 1969-06-27 | 370.3 |
| -3 | 2440769 | 1970-07-01 | 370.67 |
| -2 | 2441145 | 1971-07-12 | 370.7 |
| -1 | 2441510 | 1972-07-11 | 371.15 |
| 0 | 2441880 | 1973-07-16 | 371.02 |
| 1 | 2442263 | 1974-08-03 | 371.1 |
| 2 | 2442631 | 1975-08-06 | 370.98 |
| 3 | 2442995 | 1976-08-04 | 370.76 |
| 4 | 2443376 | 1977-08-20 | 370.45 |
| 5 | 2443737 | 1978-08-16 | 369.91 |
| 6 | 2444107 | 1979-08-21 | 369.05 |
| 7 | 2444480 | 1980-08-28 | 368.69 |
| 8 | 2444851 | 1981-09-03 | 368.12 |
| 9 | 2445214 | 1982-09-01 | 367.02 |
| 10 | 2445585 | 1983-09-07 | 366.44 |
| 11 | 2445949 | 1984-09-05 | 365.17 |
| 12 | 2446314 | 1985-09-05 | 363.89 |
| 13 | 2446678 | 1986-09-04 | 362.94 |
| 14 | 2447039 | 1987-08-31 | 362.16 |
| 15 | 2447402 | 1988-08-28 | 361.29 |
| 16 | 2447759 | 1989-08-20 | 360.65 |
| 17 | 2448119 | 1990-08-15 | 359.93 |
| 18 | 2448481 | 1991-08-12 | 359.9 |
| 19 | 2448840 | 1992-08-05 | 360.05 |
| 20 | 2449200 | 1993-07-31 | 360.21 |
| 21 | 2449557 | 1994-07-23 | 360.71 |
| 22 | 2449913 | 1995-07-14 | 361.39 |
| 23 | 2450283 | 1996-07-18 | 362.4 |
| 24 | 2450644 | 1997-07-14 | 363.47 |
| 25 | 2451004 | 1998-07-09 | 363.96 |
| 26 | 2451369 | 1999-07-09 | 364.69 |
| 27 | 2451738 | 2000-07-12 | 365.12 |
| 28 | 2452109 | 2001-07-18 | 365.07 |
| 29 | 2452474 | 2002-07-18 | 365.65 |
| 30 | 2452829 | 2003-07-08 | 365.75 |
| 31 | 2453200 | 2004-07-13 | 365.6 |
| 32 | 2453565 | 2005-07-13 | 365.55 |
| 33 | 2453929 | 2006-07-12 | 366.09 |
| 34 | 2454302 | 2007-07-20 | 366.6 |
| 35 | 2454662 | 2008-07-14 | 367.15 |
| 36 | 2455028 | 2009-07-15 | 367.59 |
| 37 | 2455397 | 2010-07-19 | 368.08 |
| 38 | 2455773 | 2011-07-30 | 369.03 |
| 39 | 2456134 | 2012-07-25 | 369.77 |
| 40 | 2456502 | 2013-07-28 | 370.79 |
| 41 | 2456879 | 2014-08-09 | 371.06 |
| 42 | 2457245 | 2015-08-10 | 371.6 |
| 43 | 2457626 | 2016-08-25 | 371.25 |
| 44 | 2457997 | 2017-08-31 | 371.01 |
| 45 | 2458369 | 2018-09-07 | 370.84 |
| 46 | 2458734 | 2019-09-07 | 370.3 |
| 47 | 2459115 | 2020-09-22 | 369.95 |
| 48 | 2459470 | 2021-09-12 | 368.64 |
| 49 | 2459836 | 2022-09-13 | 367.97 |
| 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. |