| E | O (JD) | O (dat) | Period |
| -135 | 2402207 | 1864-12-01 | 317.87 |
| -127 | 2404738 | 1871-11-06 | 317.91 |
| -124 | 2405704 | 1874-06-29 | 318.09 |
| -119 | 2407286 | 1878-10-28 | 317.99 |
| -118 | 2407610 | 1879-09-17 | 317.91 |
| -117 | 2407927 | 1880-07-30 | 318.12 |
| -116 | 2408245 | 1881-06-13 | 318.13 |
| -104 | 2412065 | 1891-11-28 | 318.02 |
| -103 | 2412375 | 1892-10-03 | 317.89 |
| -102 | 2412690 | 1893-08-14 | 317.75 |
| -97 | 2414301 | 1898-01-11 | 317.51 |
| -96 | 2414598 | 1898-11-04 | 317.05 |
| -95 | 2414923 | 1899-09-25 | 316.58 |
| -94 | 2415225 | 1900-07-24 | 317 |
| -93 | 2415550 | 1901-06-14 | 317.41 |
| -92 | 2415852 | 1902-04-12 | 317.73 |
| -91 | 2416161 | 1903-02-15 | 318.9 |
| -90 | 2416508 | 1904-01-28 | 319.48 |
| -89 | 2416827 | 1904-12-12 | 320.19 |
| -88 | 2417152 | 1905-11-02 | 320.37 |
| -87 | 2417470 | 1906-09-16 | 320.44 |
| -86 | 2417778 | 1907-07-21 | 320.39 |
| -85 | 2418104 | 1908-06-11 | 319.95 |
| -84 | 2418418 | 1909-04-21 | 320.41 |
| -83 | 2418743 | 1910-03-12 | 320.73 |
| -82 | 2419054 | 1911-01-17 | 322.14 |
| -81 | 2419390 | 1911-12-19 | 322.76 |
| -80 | 2419718 | 1912-11-11 | 322.69 |
| -79 | 2420033 | 1913-09-22 | 321.96 |
| -78 | 2420352 | 1914-08-07 | 321.18 |
| -77 | 2420691 | 1915-07-12 | 320.7 |
| -76 | 2421000 | 1916-05-16 | 320.14 |
| -75 | 2421321 | 1917-04-02 | 320.22 |
| -74 | 2421624 | 1918-01-30 | 319.96 |
| -73 | 2421950 | 1918-12-22 | 319.64 |
| -72 | 2422273 | 1919-11-10 | 319.2 |
| -71 | 2422604 | 1920-10-06 | 319.15 |
| -70 | 2422925 | 1921-08-23 | 318.53 |
| -69 | 2423231 | 1922-06-25 | 318.11 |
| -68 | 2423554 | 1923-05-14 | 317.04 |
| -67 | 2423873 | 1924-03-28 | 316.5 |
| -66 | 2424179 | 1925-01-28 | 316.42 |
| -65 | 2424493 | 1925-12-08 | 317.41 |
| -64 | 2424811 | 1926-10-22 | 319.1 |
| -63 | 2425131 | 1927-09-07 | 319.68 |
| -62 | 2425453 | 1928-07-25 | 320.64 |
| -61 | 2425776 | 1929-06-13 | 321.65 |
| -60 | 2426103 | 1930-05-06 | 322.01 |
| -59 | 2426433 | 1931-04-01 | 322.14 |
| -58 | 2426743 | 1932-02-05 | 322.25 |
| -57 | 2427066 | 1932-12-24 | 321.67 |
| -56 | 2427387 | 1933-11-10 | 320.68 |
| -55 | 2427708 | 1934-09-27 | 320.34 |
| -54 | 2428032 | 1935-08-17 | 320.09 |
| -53 | 2428358 | 1936-07-08 | 320.25 |
| -52 | 2428668 | 1937-05-14 | 320.09 |
| -51 | 2428980 | 1938-03-22 | 319.8 |
| -50 | 2429312 | 1939-02-17 | 319.84 |
| -49 | 2429629 | 1939-12-31 | 319.79 |
| -48 | 2429947 | 1940-11-13 | 319.67 |
| -47 | 2430271 | 1941-10-03 | 319.45 |
| -46 | 2430586 | 1942-08-14 | 319.37 |
| -45 | 2430912 | 1943-07-06 | 319.22 |
| -44 | 2431230 | 1944-05-19 | 319.67 |
| -43 | 2431544 | 1945-03-29 | 319.47 |
| -42 | 2431853 | 1946-02-01 | 318.56 |
| -41 | 2432183 | 1946-12-28 | 318.53 |
| -40 | 2432510 | 1947-11-20 | 318 |
| -39 | 2432831 | 1948-10-06 | 318.47 |
| -38 | 2433140 | 1949-08-11 | 318.69 |
| -37 | 2433445 | 1950-06-12 | 318.93 |
| -36 | 2433775 | 1951-05-08 | 319 |
| -35 | 2434087 | 1952-03-15 | 319.52 |
| -34 | 2434418 | 1953-02-09 | 320.05 |
| -33 | 2434732 | 1953-12-20 | 320.89 |
| -32 | 2435056 | 1954-11-09 | 321.52 |
| -31 | 2435384 | 1955-10-03 | 321.55 |
| -30 | 2435704 | 1956-08-18 | 321.45 |
| -29 | 2436016 | 1957-06-26 | 320.94 |
| -28 | 2436339 | 1958-05-15 | 321.11 |
| -27 | 2436665 | 1959-04-06 | 321.14 |
| -26 | 2436991 | 1960-02-26 | 321.05 |
| -25 | 2437301 | 1961-01-01 | 321.21 |
| -24 | 2437623 | 1961-11-19 | 321.27 |
| -23 | 2437948 | 1962-10-10 | 320.76 |
| -22 | 2438274 | 1963-09-01 | 320.36 |
| -21 | 2438591 | 1964-07-14 | 320.66 |
| -20 | 2438910 | 1965-05-29 | 321.13 |
| -19 | 2439229 | 1966-04-13 | 320.72 |
| -18 | 2439547 | 1967-02-25 | 320.05 |
| -17 | 2439868 | 1968-01-12 | 320.05 |
| -16 | 2440198 | 1968-12-07 | 320.28 |
| -15 | 2440517 | 1969-10-22 | 319.85 |
| -14 | 2440831 | 1970-09-01 | 319.82 |
| -13 | 2441145 | 1971-07-12 | 320.23 |
| -12 | 2441474 | 1972-06-05 | 320.24 |
| -11 | 2441793 | 1973-04-20 | 319.94 |
| -10 | 2442102 | 1974-02-23 | 320.56 |
| -9 | 2442430 | 1975-01-17 | 321.39 |
| -8 | 2442761 | 1975-12-14 | 321.26 |
| -7 | 2443077 | 1976-10-25 | 320.42 |
| -6 | 2443391 | 1977-09-04 | 320.28 |
| -5 | 2443720 | 1978-07-30 | 320.25 |
| -4 | 2444046 | 1979-06-21 | 319.75 |
| -3 | 2444354 | 1980-04-24 | 319.51 |
| -2 | 2444666 | 1981-03-02 | 319.85 |
| -1 | 2444991 | 1982-01-21 | 319.97 |
| 0 | 2445314 | 1982-12-10 | 319.91 |
| 1 | 2445637 | 1983-10-29 | 319.58 |
| 2 | 2445956 | 1984-09-12 | 319.91 |
| 3 | 2446277 | 1985-07-30 | 320.11 |
| 4 | 2446596 | 1986-06-14 | 319.58 |
| 5 | 2446919 | 1987-05-03 | 319.47 |
| 6 | 2447224 | 1988-03-03 | 320.05 |
| 7 | 2447548 | 1989-01-21 | 320.99 |
| 8 | 2447876 | 1989-12-15 | 321.05 |
| 9 | 2448190 | 1990-10-25 | 320.93 |
| 10 | 2448514 | 1991-09-14 | 320.01 |
| 11 | 2448846 | 1992-08-11 | 319.66 |
| 12 | 2449173 | 1993-07-04 | 318.75 |
| 13 | 2449478 | 1994-05-05 | 318.03 |
| 14 | 2449793 | 1995-03-16 | 317.06 |
| 15 | 2450096 | 1996-01-13 | 315.86 |
| 16 | 2450421 | 1996-12-03 | 314.5 |
| 17 | 2450743 | 1997-10-21 | 314.35 |
| 18 | 2451062 | 1998-09-05 | 315.48 |
| 19 | 2451366 | 1999-07-06 | 315.87 |
| 20 | 2451682 | 2000-05-17 | 316.1 |
| 21 | 2451988 | 2001-03-19 | 315.53 |
| 22 | 2452311 | 2002-02-05 | 315.72 |
| 23 | 2452640 | 2002-12-31 | 315.62 |
| 24 | 2452951 | 2003-11-07 | 316.1 |
| 25 | 2453264 | 2004-09-15 | 315.82 |
| 26 | 2453577 | 2005-07-25 | 315.91 |
| 27 | 2453900 | 2006-06-13 | 315.72 |
| 28 | 2454203 | 2007-04-12 | 315.71 |
| 29 | 2454525 | 2008-02-28 | 316.19 |
| 30 | 2454836 | 2009-01-04 | 316.92 |
| 31 | 2455159 | 2009-11-23 | 317.32 |
| 32 | 2455481 | 2010-10-11 | 316.88 |
| 33 | 2455796 | 2011-08-22 | 317.11 |
| 34 | 2456109 | 2012-06-30 | 316.65 |
| 35 | 2456435 | 2013-05-22 | 316.41 |
| 36 | 2456749 | 2014-04-01 | 316.22 |
| 37 | 2457052 | 2015-01-29 | 316.61 |
| 38 | 2457374 | 2015-12-17 | 317.38 |
| 39 | 2457690 | 2016-10-28 | 317.53 |
| 40 | 2458006 | 2017-09-09 | 317.51 |
| 41 | 2458330 | 2018-07-30 | 318.72 |
| 42 | 2458654 | 2019-06-19 | 319.46 |
| 43 | 2458975 | 2020-05-05 | 319.45 |
| 44 | 2459282 | 2021-03-08 | 319.7 |
| 45 | 2459600 | 2022-01-20 | 319.71 |
| 46 | 2459934 | 2022-12-20 | 319 |
| 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. |