| E | O (JD) | O (dat) | Period |
| -128 | 2405121 | 1872-11-23 | 269.03 |
| -112 | 2409450 | 1884-09-30 | 269 |
| -105 | 2411361 | 1889-12-24 | 269.06 |
| -96 | 2413745 | 1896-07-04 | 269.5 |
| -93 | 2414560 | 1898-09-27 | 269.39 |
| -92 | 2414828 | 1899-06-22 | 268.42 |
| -91 | 2415100 | 1900-03-21 | 267.56 |
| -90 | 2415366 | 1900-12-12 | 267.72 |
| -89 | 2415638 | 1901-09-10 | 267.55 |
| -88 | 2415910 | 1902-06-09 | 266.65 |
| -86 | 2416420 | 1903-11-01 | 265.23 |
| -85 | 2416704 | 1904-08-11 | 264.66 |
| -82 | 2417500 | 1906-10-16 | 264.89 |
| -81 | 2417761 | 1907-07-04 | 266.03 |
| -78 | 2418540 | 1909-08-21 | 266.33 |
| -75 | 2419345 | 1911-11-04 | 265.83 |
| -74 | 2419620 | 1912-08-05 | 266.27 |
| -71 | 2420425 | 1914-10-19 | 267.34 |
| -70 | 2420689 | 1915-07-10 | 268.11 |
| -67 | 2421490 | 1917-09-18 | 267 |
| -66 | 2421759 | 1918-06-14 | 266.9 |
| -64 | 2422295 | 1919-12-02 | 267.2 |
| -62 | 2422829 | 1921-05-19 | 266.17 |
| -60 | 2423345 | 1922-10-17 | 265.83 |
| -56 | 2424440 | 1925-10-16 | 265.86 |
| -55 | 2424690 | 1926-06-23 | 265.67 |
| -52 | 2425474 | 1928-08-15 | 266.92 |
| -51 | 2425750 | 1929-05-18 | 266.91 |
| -50 | 2426014 | 1930-02-06 | 265.68 |
| -49 | 2426283 | 1930-11-02 | 267.91 |
| -48 | 2426564 | 1931-08-10 | 269.05 |
| -45 | 2427360 | 1933-10-14 | 268.74 |
| -44 | 2427615 | 1934-06-26 | 269.71 |
| -41 | 2428443 | 1936-10-01 | 269.71 |
| -40 | 2428700 | 1937-06-15 | 270.23 |
| -38 | 2429245 | 1938-12-12 | 271.2 |
| -37 | 2429525 | 1939-09-18 | 271.17 |
| -36 | 2429795 | 1940-06-14 | 272.19 |
| -35 | 2430074 | 1941-03-20 | 272.2 |
| -34 | 2430325 | 1941-11-26 | 270.72 |
| -33 | 2430614 | 1942-09-11 | 268.78 |
| -32 | 2430884 | 1943-06-08 | 267.14 |
| -31 | 2431144 | 1944-02-23 | 268.79 |
| -30 | 2431416 | 1944-11-21 | 269.43 |
| -29 | 2431667 | 1945-07-30 | 267.07 |
| -28 | 2431942 | 1946-05-01 | 267.35 |
| -27 | 2432220 | 1947-02-03 | 268.5 |
| -26 | 2432491 | 1947-11-01 | 269.15 |
| -25 | 2432746 | 1948-07-13 | 269.43 |
| -24 | 2433025 | 1949-04-18 | 268.36 |
| -23 | 2433294 | 1950-01-12 | 267.85 |
| -22 | 2433557 | 1950-10-02 | 269.28 |
| -21 | 2433824 | 1951-06-26 | 268.79 |
| -20 | 2434095 | 1952-03-23 | 268 |
| -19 | 2434366 | 1952-12-19 | 269.5 |
| -18 | 2434641 | 1953-09-20 | 269.57 |
| -17 | 2434893 | 1954-05-30 | 269.14 |
| -16 | 2435178 | 1955-03-11 | 268.86 |
| -15 | 2435446 | 1955-12-04 | 267.72 |
| -14 | 2435709 | 1956-08-23 | 268.5 |
| -13 | 2435978 | 1957-05-19 | 268.85 |
| -12 | 2436247 | 1958-02-12 | 268.14 |
| -11 | 2436508 | 1958-10-31 | 269.43 |
| -10 | 2436785 | 1959-08-04 | 269.65 |
| -9 | 2437050 | 1960-04-25 | 269.57 |
| -8 | 2437328 | 1961-01-28 | 270.57 |
| -7 | 2437599 | 1961-10-26 | 270.07 |
| -6 | 2437863 | 1962-07-17 | 269 |
| -5 | 2438136 | 1963-04-16 | 268.5 |
| -4 | 2438407 | 1964-01-12 | 268 |
| -3 | 2438667 | 1964-09-28 | 268.5 |
| -2 | 2438934 | 1965-06-22 | 268.78 |
| -1 | 2439203 | 1966-03-18 | 267.5 |
| 0 | 2439476 | 1966-12-16 | 266.79 |
| 1 | 2439745 | 1967-09-11 | 267.57 |
| 2 | 2440017 | 1968-06-09 | 267.78 |
| 3 | 2440271 | 1969-02-18 | 267.28 |
| 4 | 2440538 | 1969-11-12 | 266.72 |
| 5 | 2440809 | 1970-08-10 | 266.57 |
| 6 | 2441077 | 1971-05-05 | 267.65 |
| 7 | 2441344 | 1972-01-27 | 268.78 |
| 8 | 2441611 | 1972-10-20 | 268.5 |
| 9 | 2441883 | 1973-07-19 | 267.93 |
| 10 | 2442152 | 1974-04-14 | 268.15 |
| 11 | 2442420 | 1975-01-07 | 269.15 |
| 12 | 2442686 | 1975-09-30 | 269.35 |
| 13 | 2442951 | 1976-06-21 | 269.78 |
| 14 | 2443224 | 1977-03-21 | 269.79 |
| 15 | 2443499 | 1977-12-21 | 269.29 |
| 16 | 2443766 | 1978-09-14 | 270.43 |
| 17 | 2444046 | 1979-06-21 | 271.71 |
| 18 | 2444303 | 1980-03-04 | 271.85 |
| 19 | 2444573 | 1980-11-29 | 272.07 |
| 20 | 2444850 | 1981-09-02 | 271.15 |
| 21 | 2445129 | 1982-06-08 | 270.65 |
| 22 | 2445400 | 1983-03-06 | 270.92 |
| 23 | 2445674 | 1983-12-05 | 270.85 |
| 24 | 2445934 | 1984-08-21 | 270.65 |
| 25 | 2446204 | 1985-05-18 | 270.65 |
| 26 | 2446465 | 1986-02-03 | 271 |
| 27 | 2446750 | 1986-11-15 | 271.28 |
| 28 | 2447018 | 1987-08-10 | 271.85 |
| 29 | 2447300 | 1988-05-18 | 271.72 |
| 30 | 2447568 | 1989-02-10 | 270.57 |
| 31 | 2447838 | 1989-11-07 | 269.43 |
| 32 | 2448106 | 1990-08-02 | 268.64 |
| 33 | 2448367 | 1991-04-20 | 267.5 |
| 34 | 2448636 | 1992-01-14 | 267.36 |
| 35 | 2448904 | 1992-10-08 | 267.43 |
| 36 | 2449175 | 1993-07-06 | 267.5 |
| 37 | 2449438 | 1994-03-26 | 268.14 |
| 38 | 2449711 | 1994-12-24 | 266.85 |
| 39 | 2449977 | 1995-09-16 | 264.93 |
| 40 | 2450241 | 1996-06-06 | 265.65 |
| 41 | 2450516 | 1997-03-08 | 265.86 |
| 42 | 2450760 | 1997-11-07 | 264.71 |
| 43 | 2451028 | 1998-08-02 | 264.21 |
| 44 | 2451304 | 1999-05-05 | 262.5 |
| 45 | 2451567 | 2000-01-23 | 262.72 |
| 46 | 2451827 | 2000-10-09 | 263.79 |
| 47 | 2452090 | 2001-06-29 | 262.42 |
| 48 | 2452342 | 2002-03-08 | 263 |
| 49 | 2452612 | 2002-12-03 | 264.65 |
| 50 | 2452869 | 2003-08-17 | 264.5 |
| 51 | 2453137 | 2004-05-11 | 265.79 |
| 52 | 2453416 | 2005-02-14 | 267.28 |
| 53 | 2453683 | 2005-11-08 | 267.64 |
| 54 | 2453937 | 2006-07-20 | 269.07 |
| 55 | 2454216 | 2007-04-25 | 269.5 |
| 56 | 2454480 | 2008-01-14 | 268.86 |
| 57 | 2454748 | 2008-10-08 | 269.35 |
| 58 | 2455025 | 2009-07-12 | 269.5 |
| 59 | 2455301 | 2010-04-14 | 269 |
| 60 | 2455562 | 2010-12-31 | 269.93 |
| 61 | 2455829 | 2011-09-24 | 269.15 |
| 62 | 2456097 | 2012-06-18 | 267.21 |
| 63 | 2456365 | 2013-03-13 | 267.92 |
| 64 | 2456642 | 2013-12-15 | 268.86 |
| 65 | 2456899 | 2014-08-29 | 268.93 |
| 66 | 2457168 | 2015-05-25 | 269.29 |
| 67 | 2457446 | 2016-02-27 | 268.64 |
| 68 | 2457709 | 2016-11-16 | 269 |
| 69 | 2457982 | 2017-08-16 | 270.29 |
| 70 | 2458250 | 2018-05-11 | 270.15 |
| 71 | 2458518 | 2019-02-03 | 270.79 |
| 72 | 2458789 | 2019-11-01 | 271.21 |
| 73 | 2459062 | 2020-07-31 | 270.71 |
| 74 | 2459334 | 2021-04-29 | 271.61 |
| 75 | 2459612 | 2022-02-01 | 272.5 |
| 76 | 2459876 | 2022-10-23 | 272.79 |
| 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. |