| E | O (JD) | O (dat) | Period |
| -107 | 2407530 | 1879-06-29 | 333.74 |
| -96 | 2411210 | 1889-07-26 | 333.92 |
| -95 | 2411550 | 1890-07-01 | 333.92 |
| -94 | 2411880 | 1891-05-27 | 333.88 |
| -88 | 2413873 | 1896-11-09 | 333.92 |
| -87 | 2414205 | 1897-10-07 | 334.05 |
| -86 | 2414553 | 1898-09-20 | 334.09 |
| -85 | 2414881 | 1899-08-14 | 334.75 |
| -84 | 2415213 | 1900-07-12 | 335.93 |
| -83 | 2415551 | 1901-06-15 | 334.94 |
| -82 | 2415892 | 1902-05-22 | 334.22 |
| -81 | 2416232 | 1903-04-27 | 332.93 |
| -80 | 2416580 | 1904-04-09 | 332.88 |
| -79 | 2416915 | 1905-03-10 | 332.1 |
| -73 | 2418880 | 1910-07-27 | 331.84 |
| -72 | 2419225 | 1911-07-07 | 331.61 |
| -71 | 2419535 | 1912-05-12 | 331.43 |
| -70 | 2419890 | 1913-05-02 | 331.35 |
| -69 | 2420200 | 1914-03-08 | 331.89 |
| -68 | 2420555 | 1915-02-26 | 333.17 |
| -67 | 2420890 | 1916-01-27 | 333.24 |
| -63 | 2422212 | 1919-09-10 | 333.35 |
| -62 | 2422543 | 1920-08-06 | 333.04 |
| -61 | 2422878 | 1921-07-07 | 333.07 |
| -60 | 2423217 | 1922-06-11 | 332.14 |
| -59 | 2423551 | 1923-05-11 | 332.84 |
| -58 | 2423873 | 1924-03-28 | 334.09 |
| -57 | 2424217 | 1925-03-07 | 334.63 |
| -56 | 2424537 | 1926-01-21 | 335.15 |
| -55 | 2424870 | 1926-12-20 | 335.45 |
| -54 | 2425225 | 1927-12-10 | 336.19 |
| -53 | 2425560 | 1928-11-09 | 336.31 |
| -52 | 2425894 | 1929-10-09 | 335.71 |
| -51 | 2426233 | 1930-09-13 | 335.9 |
| -50 | 2426564 | 1931-08-10 | 335.55 |
| -49 | 2426904 | 1932-07-15 | 334.94 |
| -48 | 2427227 | 1933-06-03 | 335.06 |
| -47 | 2427560 | 1934-05-02 | 334.55 |
| -46 | 2427902 | 1935-04-09 | 333.82 |
| -45 | 2428243 | 1936-03-15 | 333.52 |
| -44 | 2428579 | 1937-02-14 | 332.78 |
| -43 | 2428911 | 1938-01-12 | 332.42 |
| -42 | 2429232 | 1938-11-29 | 331.3 |
| -41 | 2429561 | 1939-10-24 | 330.49 |
| -40 | 2429897 | 1940-09-24 | 329.62 |
| -39 | 2430223 | 1941-08-16 | 328.65 |
| -38 | 2430555 | 1942-07-14 | 329.21 |
| -37 | 2430881 | 1943-06-05 | 330.48 |
| -36 | 2431219 | 1944-05-08 | 330.9 |
| -35 | 2431539 | 1945-03-24 | 331.42 |
| -34 | 2431855 | 1946-02-03 | 332.54 |
| -33 | 2432208 | 1947-01-22 | 333.13 |
| -32 | 2432551 | 1947-12-31 | 333.77 |
| -31 | 2432875 | 1948-11-19 | 334.04 |
| -30 | 2433211 | 1949-10-21 | 334.65 |
| -29 | 2433551 | 1950-09-26 | 334.49 |
| -28 | 2433879 | 1951-08-20 | 333.09 |
| -27 | 2434213 | 1952-07-19 | 332.68 |
| -26 | 2434545 | 1953-06-16 | 332.93 |
| -25 | 2434880 | 1954-05-17 | 332.54 |
| -24 | 2435211 | 1955-04-13 | 331.62 |
| -23 | 2435539 | 1956-03-06 | 331.69 |
| -22 | 2435874 | 1957-02-04 | 331.39 |
| -21 | 2436210 | 1958-01-06 | 331.32 |
| -20 | 2436539 | 1958-12-01 | 331.18 |
| -19 | 2436857 | 1959-10-15 | 330.71 |
| -18 | 2437200 | 1960-09-22 | 330.77 |
| -17 | 2437528 | 1961-08-16 | 330.85 |
| -16 | 2437862 | 1962-07-16 | 331.43 |
| -15 | 2438192 | 1963-06-11 | 332.22 |
| -14 | 2438512 | 1964-04-26 | 332.83 |
| -13 | 2438853 | 1965-04-02 | 332.86 |
| -12 | 2439188 | 1966-03-03 | 333.53 |
| -11 | 2439527 | 1967-02-05 | 333.84 |
| -10 | 2439859 | 1968-01-03 | 334.27 |
| -9 | 2440190 | 1968-11-29 | 334.65 |
| -8 | 2440526 | 1969-10-31 | 334.02 |
| -7 | 2440862 | 1970-10-02 | 333.07 |
| -6 | 2441193 | 1971-08-29 | 332.05 |
| -5 | 2441528 | 1972-07-29 | 331.4 |
| -4 | 2441864 | 1973-06-30 | 330.82 |
| -3 | 2442192 | 1974-05-24 | 330.38 |
| -2 | 2442512 | 1975-04-09 | 329.65 |
| -1 | 2442840 | 1976-03-02 | 329.8 |
| 0 | 2443172 | 1977-01-28 | 329.65 |
| 1 | 2443504 | 1977-12-26 | 329.74 |
| 2 | 2443839 | 1978-11-26 | 329.76 |
| 3 | 2444159 | 1979-10-12 | 330.25 |
| 4 | 2444502 | 1980-09-19 | 330.28 |
| 5 | 2444826 | 1981-08-09 | 330.53 |
| 6 | 2445156 | 1982-07-05 | 331.06 |
| 7 | 2445477 | 1983-05-22 | 331.44 |
| 8 | 2445816 | 1984-04-25 | 331.44 |
| 9 | 2446147 | 1985-03-22 | 331.44 |
| 10 | 2446485 | 1986-02-23 | 331.72 |
| 11 | 2446822 | 1987-01-26 | 331.5 |
| 12 | 2447150 | 1987-12-20 | 331.54 |
| 13 | 2447469 | 1988-11-03 | 331.18 |
| 14 | 2447811 | 1989-10-11 | 331.15 |
| 15 | 2448136 | 1990-09-01 | 330.58 |
| 16 | 2448463 | 1991-07-25 | 330.21 |
| 17 | 2448800 | 1992-06-26 | 330.45 |
| 18 | 2449135 | 1993-05-27 | 330.64 |
| 19 | 2449467 | 1994-04-24 | 329.85 |
| 20 | 2449788 | 1995-03-11 | 329.37 |
| 21 | 2450115 | 1996-02-01 | 328.85 |
| 22 | 2450450 | 1997-01-01 | 328.05 |
| 23 | 2450781 | 1997-11-28 | 327.75 |
| 24 | 2451103 | 1998-10-16 | 327.92 |
| 25 | 2451426 | 1999-09-04 | 328.45 |
| 26 | 2451758 | 2000-08-01 | 328.35 |
| 27 | 2452084 | 2001-06-23 | 328.2 |
| 28 | 2452415 | 2002-05-20 | 328.77 |
| 29 | 2452746 | 2003-04-16 | 330.47 |
| 30 | 2453078 | 2004-03-13 | 331.4 |
| 31 | 2453401 | 2005-01-30 | 331.59 |
| 32 | 2453730 | 2005-12-25 | 332.35 |
| 33 | 2454067 | 2006-11-27 | 332.79 |
| 34 | 2454418 | 2007-11-13 | 332.74 |
| 35 | 2454742 | 2008-10-02 | 332.66 |
| 36 | 2455066 | 2009-08-22 | 332.8 |
| 37 | 2455408 | 2010-07-30 | 332.03 |
| 38 | 2455740 | 2011-06-27 | 331.9 |
| 39 | 2456063 | 2012-05-15 | 331.85 |
| 40 | 2456395 | 2013-04-12 | 332.35 |
| 41 | 2456731 | 2014-03-14 | 332.15 |
| 42 | 2457054 | 2015-01-31 | 331.9 |
| 43 | 2457404 | 2016-01-16 | 331.96 |
| 44 | 2457736 | 2016-12-13 | 331.87 |
| 45 | 2458061 | 2017-11-03 | 331.66 |
| 46 | 2458385 | 2018-09-23 | 331.59 |
| 47 | 2458724 | 2019-08-28 | 331.48 |
| 48 | 2459052 | 2020-07-21 | 330.52 |
| 49 | 2459382 | 2021-06-16 | 330.85 |
| 49 | 2459382 | 2021-06-16 | 330.85 |
| 50 | 2459719 | 2022-05-19 | 332.64 |
| 50 | 2459719 | 2022-05-19 | 332.64 |
| 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. |