| E | O (JD) | O (dat) | Period |
| -103 | 2411481 | 1890-04-23 | 270.48 |
| -99 | 2412586 | 1893-05-02 | 270.84 |
| -94 | 2413955 | 1897-01-30 | 271.59 |
| -90 | 2415050 | 1900-01-30 | 272.47 |
| -88 | 2415567 | 1901-07-01 | 272.34 |
| -87 | 2415844 | 1902-04-04 | 272.37 |
| -86 | 2416120 | 1903-01-05 | 272.51 |
| -84 | 2416662 | 1904-06-30 | 272.68 |
| -83 | 2416937 | 1905-04-01 | 272.93 |
| -61 | 2422950 | 1921-09-17 | 272.98 |
| -60 | 2423223 | 1922-06-17 | 273.03 |
| -59 | 2423482 | 1923-03-03 | 272.95 |
| -58 | 2423759 | 1923-12-05 | 272.65 |
| -57 | 2424038 | 1924-09-09 | 272.45 |
| -52 | 2425399 | 1928-06-01 | 273.32 |
| -51 | 2425669 | 1929-02-26 | 274 |
| -50 | 2425942 | 1929-11-26 | 273.77 |
| -49 | 2426225 | 1930-09-05 | 273.66 |
| -48 | 2426493 | 1931-05-31 | 275.07 |
| -47 | 2426776 | 1932-03-09 | 275.78 |
| -46 | 2427044 | 1932-12-02 | 275.71 |
| -45 | 2427319 | 1933-09-03 | 275.86 |
| -44 | 2427600 | 1934-06-11 | 275.57 |
| -43 | 2427872 | 1935-03-10 | 276.14 |
| -42 | 2428155 | 1935-12-18 | 277.86 |
| -41 | 2428425 | 1936-09-13 | 277.29 |
| -40 | 2428702 | 1937-06-17 | 276.36 |
| -39 | 2428984 | 1938-03-26 | 275.36 |
| -38 | 2429269 | 1939-01-05 | 275.08 |
| -37 | 2429532 | 1939-09-25 | 274.5 |
| -36 | 2429809 | 1940-06-28 | 272.28 |
| -35 | 2430073 | 1941-03-19 | 270.71 |
| -34 | 2430358 | 1941-12-29 | 270.28 |
| -33 | 2430612 | 1942-09-09 | 270.07 |
| -32 | 2430886 | 1943-06-10 | 270.86 |
| -31 | 2431157 | 1944-03-07 | 271.78 |
| -30 | 2431428 | 1944-12-03 | 273 |
| -29 | 2431694 | 1945-08-26 | 274.08 |
| -28 | 2431980 | 1946-06-08 | 273.72 |
| -27 | 2432256 | 1947-03-11 | 274.07 |
| -26 | 2432536 | 1947-12-16 | 274 |
| -25 | 2432799 | 1948-09-04 | 272.64 |
| -24 | 2433076 | 1949-06-08 | 271.5 |
| -23 | 2433346 | 1950-03-05 | 270.78 |
| -22 | 2433612 | 1950-11-26 | 269.86 |
| -21 | 2433879 | 1951-08-20 | 270.14 |
| -20 | 2434158 | 1952-05-25 | 269.78 |
| -19 | 2434425 | 1953-02-16 | 269.43 |
| -18 | 2434688 | 1953-11-06 | 270.21 |
| -17 | 2434969 | 1954-08-14 | 270.28 |
| -16 | 2435230 | 1955-05-02 | 269.71 |
| -15 | 2435500 | 1956-01-27 | 270.07 |
| -14 | 2435774 | 1956-10-27 | 269.78 |
| -13 | 2436047 | 1957-07-27 | 269.93 |
| -12 | 2436312 | 1958-04-18 | 271.01 |
| -11 | 2436582 | 1959-01-13 | 270.36 |
| -10 | 2436852 | 1959-10-10 | 269.71 |
| -9 | 2437126 | 1960-07-10 | 270.65 |
| -8 | 2437398 | 1961-04-08 | 271.51 |
| -7 | 2437661 | 1961-12-27 | 272 |
| -6 | 2437936 | 1962-09-28 | 272.43 |
| -5 | 2438212 | 1963-07-01 | 272.78 |
| -4 | 2438483 | 1964-03-28 | 273.21 |
| -3 | 2438759 | 1964-12-29 | 273.5 |
| -2 | 2439033 | 1965-09-29 | 274.28 |
| -1 | 2439310 | 1966-07-03 | 274.14 |
| 0 | 2439574 | 1967-03-24 | 272.93 |
| 1 | 2439852 | 1967-12-27 | 272.78 |
| 2 | 2440136 | 1968-10-06 | 272.86 |
| 3 | 2440397 | 1969-06-24 | 272.57 |
| 4 | 2440666 | 1970-03-20 | 271.78 |
| 5 | 2440945 | 1970-12-24 | 271.43 |
| 6 | 2441218 | 1971-09-23 | 272.78 |
| 7 | 2441482 | 1972-06-13 | 273.21 |
| 8 | 2441749 | 1973-03-07 | 271.58 |
| 9 | 2442039 | 1973-12-22 | 271.22 |
| 10 | 2442313 | 1974-09-22 | 272.71 |
| 11 | 2442575 | 1975-06-11 | 273.15 |
| 12 | 2442838 | 1976-02-29 | 272.36 |
| 13 | 2443122 | 1976-12-09 | 271.93 |
| 14 | 2443396 | 1977-09-09 | 272.57 |
| 15 | 2443659 | 1978-05-30 | 272.71 |
| 16 | 2443942 | 1979-03-09 | 272.64 |
| 17 | 2444217 | 1979-12-09 | 272.43 |
| 18 | 2444487 | 1980-09-04 | 272.71 |
| 19 | 2444744 | 1981-05-19 | 272.43 |
| 20 | 2445033 | 1982-03-04 | 271.43 |
| 21 | 2445299 | 1982-11-25 | 272 |
| 22 | 2445574 | 1983-08-27 | 273.57 |
| 23 | 2445841 | 1984-05-20 | 273.43 |
| 24 | 2446118 | 1985-02-21 | 272.71 |
| 25 | 2446394 | 1985-11-24 | 272.86 |
| 26 | 2446667 | 1986-08-24 | 273.14 |
| 27 | 2446938 | 1987-05-22 | 273.64 |
| 28 | 2447212 | 1988-02-20 | 273.15 |
| 29 | 2447481 | 1988-11-15 | 272.36 |
| 30 | 2447758 | 1989-08-19 | 272.28 |
| 31 | 2448032 | 1990-05-20 | 272.86 |
| 32 | 2448304 | 1991-02-16 | 273.43 |
| 33 | 2448570 | 1991-11-09 | 273.14 |
| 34 | 2448847 | 1992-08-12 | 272.57 |
| 35 | 2449123 | 1993-05-15 | 273.21 |
| 36 | 2449398 | 1994-02-14 | 274.14 |
| 37 | 2449665 | 1994-11-08 | 274.28 |
| 38 | 2449941 | 1995-08-11 | 273.65 |
| 39 | 2450220 | 1996-05-16 | 272.51 |
| 40 | 2450492 | 1997-02-12 | 272.64 |
| 41 | 2450765 | 1997-11-12 | 274.72 |
| 42 | 2451036 | 1998-08-10 | 273.79 |
| 43 | 2451300 | 1999-05-01 | 271.93 |
| 44 | 2451580 | 2000-02-05 | 272.28 |
| 45 | 2451872 | 2000-11-23 | 273.36 |
| 46 | 2452122 | 2001-07-31 | 273.71 |
| 47 | 2452397 | 2002-05-02 | 273 |
| 48 | 2452672 | 2003-02-01 | 271.78 |
| 49 | 2452956 | 2003-11-12 | 271.86 |
| 50 | 2453212 | 2004-07-25 | 272.64 |
| 51 | 2453490 | 2005-04-29 | 271.5 |
| 52 | 2453767 | 2006-01-31 | 270.21 |
| 53 | 2454033 | 2006-10-24 | 270.93 |
| 54 | 2454303 | 2007-07-21 | 271.28 |
| 55 | 2454567 | 2008-04-10 | 270.14 |
| 56 | 2454844 | 2009-01-12 | 270.28 |
| 57 | 2455117 | 2009-10-12 | 270.71 |
| 58 | 2455383 | 2010-07-05 | 271.15 |
| 59 | 2455656 | 2011-04-04 | 271.22 |
| 60 | 2455928 | 2012-01-01 | 270.5 |
| 61 | 2456198 | 2012-09-27 | 271.01 |
| 62 | 2456468 | 2013-06-24 | 271.51 |
| 63 | 2456740 | 2014-03-23 | 271.07 |
| 64 | 2457008 | 2014-12-16 | 271.64 |
| 65 | 2457286 | 2015-09-20 | 273 |
| 66 | 2457554 | 2016-06-14 | 273.28 |
| 67 | 2457825 | 2017-03-12 | 272.78 |
| 68 | 2458104 | 2017-12-16 | 272.71 |
| 69 | 2458384 | 2018-09-22 | 273.43 |
| 70 | 2458650 | 2019-06-15 | 273.5 |
| 71 | 2458917 | 2020-03-08 | 272.86 |
| 72 | 2459195 | 2020-12-11 | 271.43 |
| 73 | 2459473 | 2021-09-15 | 270.99 |
| 74 | 2459735 | 2022-06-04 | 272 |
| 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. |