| E | O (JD) | O (dat) | Period |
| -150 | 2398882 | 1855-10-25 | 269.84 |
| -145 | 2400225 | 1859-06-29 | 269.8 |
| -142 | 2401029 | 1861-09-10 | 269.32 |
| -138 | 2402112 | 1864-08-28 | 268.95 |
| -134 | 2403193 | 1867-08-14 | 269.34 |
| -133 | 2403462 | 1868-05-09 | 269.36 |
| -131 | 2403993 | 1869-10-22 | 269.15 |
| -130 | 2404262 | 1870-07-18 | 269.11 |
| -127 | 2405080 | 1872-10-13 | 269.06 |
| -101 | 2412066 | 1891-11-29 | 269.17 |
| -100 | 2412338 | 1892-08-27 | 269.23 |
| -97 | 2413150 | 1894-11-17 | 269.04 |
| -96 | 2413415 | 1895-08-09 | 269.19 |
| -93 | 2414228 | 1897-10-30 | 269.66 |
| -89 | 2415296 | 1900-10-03 | 269.56 |
| -86 | 2416107 | 1902-12-23 | 269.62 |
| -84 | 2416652 | 1904-06-20 | 268.83 |
| -82 | 2417190 | 1905-12-10 | 269.2 |
| -81 | 2417463 | 1906-09-09 | 270.7 |
| -80 | 2417730 | 1907-06-03 | 269.16 |
| -79 | 2417978 | 1908-02-06 | 267.89 |
| -78 | 2418276 | 1908-11-30 | 266.79 |
| -77 | 2418541 | 1909-08-22 | 266.35 |
| -74 | 2419332 | 1911-10-22 | 268.3 |
| -73 | 2419600 | 1912-07-16 | 267.81 |
| -71 | 2420122 | 1913-12-20 | 266.23 |
| -70 | 2420398 | 1914-09-22 | 266.55 |
| -69 | 2420676 | 1915-06-27 | 267.26 |
| -67 | 2421202 | 1916-12-04 | 268.84 |
| -66 | 2421472 | 1917-08-31 | 269.16 |
| -65 | 2421732 | 1918-05-18 | 268.25 |
| -63 | 2422278 | 1919-11-15 | 268.52 |
| -62 | 2422552 | 1920-08-15 | 269 |
| -60 | 2423082 | 1922-01-27 | 269.28 |
| -59 | 2423357 | 1922-10-29 | 269 |
| -58 | 2423623 | 1923-07-22 | 268.87 |
| -57 | 2423893 | 1924-04-17 | 269.99 |
| -56 | 2424158 | 1925-01-07 | 270 |
| -55 | 2424425 | 1925-10-01 | 269.94 |
| -54 | 2424707 | 1926-07-10 | 270.86 |
| -53 | 2424977 | 1927-04-06 | 272.71 |
| -52 | 2425242 | 1927-12-27 | 274.78 |
| -51 | 2425517 | 1928-09-27 | 273.93 |
| -50 | 2425791 | 1929-06-28 | 272.44 |
| -49 | 2426078 | 1930-04-11 | 273.14 |
| -48 | 2426352 | 1931-01-10 | 272.92 |
| -47 | 2426615 | 1931-09-30 | 272.49 |
| -46 | 2426883 | 1932-06-24 | 272 |
| -45 | 2427160 | 1933-03-28 | 270.61 |
| -44 | 2427420 | 1933-12-13 | 271.25 |
| -43 | 2427703 | 1934-09-22 | 271.87 |
| -42 | 2427974 | 1935-06-20 | 271.31 |
| -40 | 2428515 | 1936-12-12 | 272.01 |
| -39 | 2428792 | 1937-09-15 | 272.82 |
| -38 | 2429056 | 1938-06-06 | 272.25 |
| -37 | 2429328 | 1939-03-05 | 270.81 |
| -36 | 2429604 | 1939-12-06 | 269.32 |
| -35 | 2429884 | 1940-09-11 | 269.84 |
| -34 | 2430149 | 1941-06-03 | 270.7 |
| -32 | 2430673 | 1942-11-09 | 269.9 |
| -31 | 2430943 | 1943-08-06 | 268.91 |
| -28 | 2431762 | 1945-11-02 | 268.86 |
| -27 | 2432036 | 1946-08-03 | 269.9 |
| -25 | 2432564 | 1948-01-13 | 270.7 |
| -24 | 2432840 | 1948-10-15 | 270.34 |
| -23 | 2433108 | 1949-07-10 | 270 |
| -22 | 2433382 | 1950-04-10 | 269.86 |
| -21 | 2433648 | 1951-01-01 | 269.36 |
| -20 | 2433923 | 1951-10-03 | 268.58 |
| -19 | 2434195 | 1952-07-01 | 268.29 |
| -18 | 2434453 | 1953-03-16 | 268.71 |
| -17 | 2434722 | 1953-12-10 | 268.35 |
| -16 | 2434986 | 1954-08-31 | 267.07 |
| -15 | 2435260 | 1955-06-01 | 267.51 |
| -14 | 2435532 | 1956-02-28 | 267.79 |
| -13 | 2435796 | 1956-11-18 | 267.42 |
| -12 | 2436061 | 1957-08-10 | 267.07 |
| -11 | 2436332 | 1958-05-08 | 266.14 |
| -10 | 2436592 | 1959-01-23 | 265.72 |
| -9 | 2436860 | 1959-10-18 | 265.93 |
| -8 | 2437125 | 1960-07-09 | 265.64 |
| -7 | 2437393 | 1961-04-03 | 265.49 |
| -6 | 2437655 | 1961-12-21 | 266.22 |
| -5 | 2437925 | 1962-09-17 | 266.94 |
| -4 | 2438187 | 1963-06-06 | 267.86 |
| -3 | 2438454 | 1964-02-28 | 268.42 |
| -2 | 2438725 | 1964-11-25 | 268.64 |
| -1 | 2438997 | 1965-08-24 | 268.79 |
| 0 | 2439271 | 1966-05-25 | 269.29 |
| 1 | 2439535 | 1967-02-13 | 269.29 |
| 2 | 2439806 | 1967-11-11 | 268.35 |
| 3 | 2440069 | 1968-07-31 | 267.57 |
| 4 | 2440342 | 1969-04-30 | 267.72 |
| 5 | 2440607 | 1970-01-20 | 268.22 |
| 6 | 2440872 | 1970-10-12 | 269.14 |
| 7 | 2441142 | 1971-07-09 | 270.07 |
| 8 | 2441412 | 1972-04-04 | 270.42 |
| 9 | 2441684 | 1973-01-01 | 271 |
| 10 | 2441959 | 1973-10-03 | 271.58 |
| 11 | 2442233 | 1974-07-04 | 271.64 |
| 12 | 2442502 | 1975-03-30 | 271.35 |
| 13 | 2442771 | 1975-12-24 | 270.78 |
| 14 | 2443045 | 1976-09-23 | 270.72 |
| 15 | 2443312 | 1977-06-17 | 271.15 |
| 16 | 2443583 | 1978-03-15 | 270.93 |
| 17 | 2443851 | 1978-12-08 | 270.78 |
| 18 | 2444131 | 1979-09-14 | 271.78 |
| 19 | 2444400 | 1980-06-09 | 273.57 |
| 20 | 2444666 | 1981-03-02 | 274.51 |
| 21 | 2444941 | 1981-12-02 | 273.79 |
| 22 | 2445221 | 1982-09-08 | 273.99 |
| 23 | 2445504 | 1983-06-18 | 275.42 |
| 24 | 2445773 | 1984-03-13 | 275.14 |
| 25 | 2446042 | 1984-12-07 | 274.51 |
| 26 | 2446325 | 1985-09-16 | 273.86 |
| 27 | 2446597 | 1986-06-15 | 273.57 |
| 28 | 2446862 | 1987-03-07 | 274.42 |
| 29 | 2447143 | 1987-12-13 | 273.72 |
| 30 | 2447416 | 1988-09-11 | 272.51 |
| 31 | 2447691 | 1989-06-13 | 272.72 |
| 32 | 2447966 | 1990-03-15 | 272.14 |
| 33 | 2448233 | 1990-12-07 | 271.21 |
| 34 | 2448504 | 1991-09-04 | 271 |
| 35 | 2448773 | 1992-05-30 | 270.22 |
| 36 | 2449042 | 1993-02-23 | 269.72 |
| 37 | 2449314 | 1993-11-22 | 269.14 |
| 38 | 2449587 | 1994-08-22 | 268.64 |
| 39 | 2449853 | 1995-05-15 | 268.36 |
| 40 | 2450122 | 1996-02-08 | 267.65 |
| 41 | 2450383 | 1996-10-26 | 267.57 |
| 42 | 2450655 | 1997-07-25 | 267.28 |
| 43 | 2450917 | 1998-04-13 | 267.07 |
| 44 | 2451186 | 1999-01-07 | 267.93 |
| 45 | 2451461 | 1999-10-09 | 268.51 |
| 46 | 2451721 | 2000-06-25 | 268.86 |
| 47 | 2451993 | 2001-03-24 | 269.78 |
| 48 | 2452263 | 2001-12-19 | 269.49 |
| 49 | 2452534 | 2002-09-16 | 269.36 |
| 50 | 2452802 | 2003-06-11 | 270.22 |
| 51 | 2453078 | 2004-03-13 | 270.22 |
| 52 | 2453342 | 2004-12-02 | 270.21 |
| 53 | 2453611 | 2005-08-28 | 270.92 |
| 54 | 2453886 | 2006-05-30 | 270.64 |
| 55 | 2454153 | 2007-02-21 | 269.65 |
| 56 | 2454427 | 2007-11-22 | 270.14 |
| 57 | 2454702 | 2008-08-23 | 270.14 |
| 58 | 2454967 | 2009-05-15 | 270.14 |
| 59 | 2455228 | 2010-01-31 | 270.64 |
| 60 | 2455507 | 2010-11-06 | 270.29 |
| 61 | 2455772 | 2011-07-29 | 270.43 |
| 62 | 2456049 | 2012-05-01 | 271.35 |
| 63 | 2456320 | 2013-01-27 | 271.49 |
| 64 | 2456593 | 2013-10-27 | 271.5 |
| 65 | 2456862 | 2014-07-23 | 271.08 |
| 66 | 2457132 | 2015-04-19 | 270.07 |
| 67 | 2457404 | 2016-01-16 | 269.64 |
| 68 | 2457676 | 2016-10-14 | 270.14 |
| 69 | 2457940 | 2017-07-05 | 271.22 |
| 70 | 2458210 | 2018-04-01 | 270.79 |
| 71 | 2458478 | 2018-12-25 | 270.43 |
| 72 | 2458759 | 2019-10-02 | 271.14 |
| 73 | 2459032 | 2020-07-01 | 271.77 |
| 74 | 2459295 | 2021-03-21 | 273.03 |
| 75 | 2459571 | 2021-12-22 | 272.1 |
| 76 | 2459841 | 2022-09-18 | 270.32 |
| 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. |