| E | O (JD) | O (dat) | Period |
| -161 | 2398685 | 1855-04-11 | 273.84 |
| -160 | 2398950 | 1856-01-01 | 273.79 |
| -125 | 2408536 | 1882-03-31 | 273.74 |
| -113 | 2411834 | 1891-04-11 | 273.7 |
| -112 | 2412095 | 1891-12-28 | 273.67 |
| -109 | 2412917 | 1894-03-29 | 273.59 |
| -105 | 2414008 | 1897-03-24 | 273.54 |
| -104 | 2414277 | 1897-12-18 | 272.66 |
| -101 | 2415098 | 1900-03-19 | 271.87 |
| -100 | 2415369 | 1900-12-15 | 272.44 |
| -97 | 2416177 | 1903-03-03 | 272.23 |
| -96 | 2416455 | 1903-12-06 | 272.49 |
| -94 | 2416992 | 1905-05-26 | 272.9 |
| -93 | 2417266 | 1906-02-24 | 273.16 |
| -92 | 2417565 | 1906-12-20 | 273.81 |
| -91 | 2417814 | 1907-08-26 | 273.94 |
| -90 | 2418100 | 1908-06-07 | 274.31 |
| -89 | 2418375 | 1909-03-09 | 274.62 |
| -88 | 2418644 | 1909-12-03 | 273.98 |
| -87 | 2418924 | 1910-09-09 | 273.4 |
| -85 | 2419456 | 1912-02-23 | 274.14 |
| -84 | 2419750 | 1912-12-13 | 273.81 |
| -82 | 2420294 | 1914-06-10 | 273.77 |
| -81 | 2420558 | 1915-03-01 | 274.15 |
| -80 | 2420832 | 1915-11-30 | 274.45 |
| -79 | 2421116 | 1916-09-09 | 275.08 |
| -78 | 2421386 | 1917-06-06 | 274.43 |
| -77 | 2421656 | 1918-03-03 | 275.03 |
| -76 | 2421940 | 1918-12-12 | 275.32 |
| -75 | 2422218 | 1919-09-16 | 274.95 |
| -74 | 2422492 | 1920-06-16 | 274.29 |
| -73 | 2422758 | 1921-03-09 | 273.85 |
| -72 | 2423037 | 1921-12-13 | 272.9 |
| -71 | 2423311 | 1922-09-13 | 271.99 |
| -70 | 2423583 | 1923-06-12 | 271.27 |
| -69 | 2423853 | 1924-03-08 | 270.5 |
| -68 | 2424121 | 1924-12-01 | 270.23 |
| -67 | 2424387 | 1925-08-24 | 269.99 |
| -66 | 2424664 | 1926-05-28 | 270.35 |
| -65 | 2424929 | 1927-02-17 | 270.71 |
| -64 | 2425192 | 1927-11-07 | 271.09 |
| -63 | 2425469 | 1928-08-10 | 271.64 |
| -62 | 2425746 | 1929-05-14 | 272.1 |
| -61 | 2426022 | 1930-02-14 | 272.46 |
| -60 | 2426290 | 1930-11-09 | 273.05 |
| -59 | 2426560 | 1931-08-06 | 273.49 |
| -58 | 2426835 | 1932-05-07 | 273.28 |
| -57 | 2427108 | 1933-02-04 | 273.44 |
| -56 | 2427384 | 1933-11-07 | 273.22 |
| -55 | 2427656 | 1934-08-06 | 273.39 |
| -54 | 2427933 | 1935-05-10 | 273.6 |
| -53 | 2428204 | 1936-02-05 | 273.08 |
| -52 | 2428482 | 1936-11-09 | 273 |
| -51 | 2428744 | 1937-07-29 | 273.65 |
| -50 | 2429021 | 1938-05-02 | 274.05 |
| -49 | 2429300 | 1939-02-05 | 274.28 |
| -48 | 2429562 | 1939-10-25 | 274.37 |
| -47 | 2429842 | 1940-07-31 | 274.4 |
| -46 | 2430132 | 1941-05-17 | 274.62 |
| -45 | 2430400 | 1942-02-09 | 274.15 |
| -44 | 2430673 | 1942-11-09 | 274.92 |
| -43 | 2430941 | 1943-08-04 | 275.55 |
| -42 | 2431216 | 1944-05-05 | 274.99 |
| -41 | 2431489 | 1945-02-02 | 274.91 |
| -40 | 2431761 | 1945-11-01 | 275.03 |
| -39 | 2432059 | 1946-08-26 | 274.62 |
| -38 | 2432329 | 1947-05-23 | 274.27 |
| -37 | 2432594 | 1948-02-12 | 273.84 |
| -36 | 2432875 | 1948-11-19 | 273.42 |
| -35 | 2433138 | 1949-08-09 | 272.46 |
| -34 | 2433406 | 1950-05-04 | 271.18 |
| -33 | 2433681 | 1951-02-03 | 271.39 |
| -32 | 2433959 | 1951-11-08 | 271.67 |
| -31 | 2434233 | 1952-08-08 | 272.13 |
| -30 | 2434497 | 1953-04-29 | 273.51 |
| -29 | 2434765 | 1954-01-22 | 274.08 |
| -28 | 2435041 | 1954-10-25 | 274.16 |
| -27 | 2435315 | 1955-07-26 | 274.21 |
| -26 | 2435598 | 1956-05-04 | 274.73 |
| -25 | 2435882 | 1957-02-12 | 275.54 |
| -24 | 2436150 | 1957-11-07 | 275.58 |
| -23 | 2436420 | 1958-08-04 | 274.98 |
| -22 | 2436692 | 1959-05-03 | 274.03 |
| -21 | 2436971 | 1960-02-06 | 273.29 |
| -20 | 2437251 | 1960-11-12 | 272.9 |
| -19 | 2437521 | 1961-08-09 | 272.74 |
| -18 | 2437790 | 1962-05-05 | 272.73 |
| -17 | 2438056 | 1963-01-26 | 272.33 |
| -16 | 2438335 | 1963-11-01 | 271.94 |
| -15 | 2438607 | 1964-07-30 | 272.05 |
| -14 | 2438873 | 1965-04-22 | 272.53 |
| -13 | 2439153 | 1966-01-27 | 272.88 |
| -12 | 2439421 | 1966-10-22 | 273 |
| -11 | 2439695 | 1967-07-23 | 273.25 |
| -10 | 2439972 | 1968-04-25 | 273.49 |
| -9 | 2440244 | 1969-01-22 | 273.68 |
| -8 | 2440516 | 1969-10-21 | 273.03 |
| -7 | 2440787 | 1970-07-19 | 273.09 |
| -6 | 2441070 | 1971-04-28 | 272.95 |
| -5 | 2441338 | 1972-01-21 | 273.36 |
| -4 | 2441611 | 1972-10-20 | 273.41 |
| -3 | 2441874 | 1973-07-10 | 273.57 |
| -2 | 2442154 | 1974-04-16 | 273.58 |
| -1 | 2442428 | 1975-01-15 | 273.52 |
| 0 | 2442713 | 1975-10-27 | 273.18 |
| 1 | 2442976 | 1976-07-16 | 273.22 |
| 2 | 2443253 | 1977-04-19 | 273.39 |
| 3 | 2443525 | 1978-01-16 | 272.63 |
| 4 | 2443800 | 1978-10-18 | 272.2 |
| 5 | 2444057 | 1979-07-02 | 271.8 |
| 6 | 2444341 | 1980-04-11 | 272.32 |
| 7 | 2444617 | 1981-01-12 | 272.16 |
| 8 | 2444882 | 1981-10-04 | 272.83 |
| 9 | 2445155 | 1982-07-04 | 273.46 |
| 10 | 2445427 | 1983-04-02 | 274.17 |
| 11 | 2445705 | 1984-01-05 | 274.17 |
| 12 | 2445973 | 1984-09-29 | 274.53 |
| 13 | 2446258 | 1985-07-11 | 275.55 |
| 14 | 2446532 | 1986-04-11 | 276.08 |
| 15 | 2446805 | 1987-01-09 | 276.84 |
| 16 | 2447082 | 1987-10-13 | 276.65 |
| 17 | 2447354 | 1988-07-11 | 276.23 |
| 18 | 2447640 | 1989-04-23 | 275.65 |
| 19 | 2447916 | 1990-01-24 | 275.64 |
| 20 | 2448200 | 1990-11-04 | 275.39 |
| 21 | 2448462 | 1991-07-24 | 274.96 |
| 22 | 2448730 | 1992-04-17 | 274.43 |
| 23 | 2449010 | 1993-01-22 | 273.79 |
| 24 | 2449288 | 1993-10-27 | 273.28 |
| 25 | 2449560 | 1994-07-26 | 273.09 |
| 26 | 2449834 | 1995-04-26 | 274.05 |
| 27 | 2450105 | 1996-01-22 | 273.45 |
| 28 | 2450381 | 1996-10-24 | 272.65 |
| 29 | 2450646 | 1997-07-16 | 272.21 |
| 30 | 2450923 | 1998-04-19 | 271.75 |
| 31 | 2451209 | 1999-01-30 | 271.48 |
| 32 | 2451462 | 1999-10-10 | 271.15 |
| 33 | 2451736 | 2000-07-10 | 271.12 |
| 34 | 2452009 | 2001-04-09 | 271.22 |
| 35 | 2452275 | 2001-12-31 | 270.82 |
| 36 | 2452550 | 2002-10-02 | 270.86 |
| 37 | 2452818 | 2003-06-27 | 272.09 |
| 38 | 2453096 | 2004-03-31 | 272.25 |
| 39 | 2453366 | 2004-12-26 | 272.49 |
| 40 | 2453634 | 2005-09-20 | 272.99 |
| 41 | 2453909 | 2006-06-22 | 273.2 |
| 42 | 2454189 | 2007-03-29 | 273.31 |
| 43 | 2454458 | 2007-12-23 | 273.13 |
| 44 | 2454730 | 2008-09-20 | 273.44 |
| 45 | 2455007 | 2009-06-24 | 273.89 |
| 46 | 2455281 | 2010-03-25 | 273.97 |
| 47 | 2455550 | 2010-12-19 | 274.61 |
| 48 | 2455822 | 2011-09-17 | 275.06 |
| 49 | 2456100 | 2012-06-21 | 274.91 |
| 50 | 2456380 | 2013-03-28 | 274.74 |
| 51 | 2456653 | 2013-12-26 | 274.6 |
| 52 | 2456939 | 2014-10-08 | 274.11 |
| 53 | 2457205 | 2015-07-01 | 273.2 |
| 54 | 2457472 | 2016-03-24 | 272.17 |
| 55 | 2457748 | 2016-12-25 | 271.4 |
| 56 | 2458020 | 2017-09-23 | 270.85 |
| 57 | 2458286 | 2018-06-16 | 270.44 |
| 58 | 2458555 | 2019-03-12 | 270.22 |
| 59 | 2458827 | 2019-12-09 | 270.17 |
| 60 | 2459100 | 2020-09-07 | 269.82 |
| 61 | 2459369 | 2021-06-03 | 269.79 |
| 62 | 2459642 | 2022-03-03 | 270.04 |
| 63 | 2459901 | 2022-11-17 | 269.83 |
| 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. |