| E | O (JD) | O (dat) | Period |
| -107 | 2411620 | 1890-09-09 | 271.06 |
| -104 | 2412437 | 1892-12-04 | 270.37 |
| -103 | 2412709 | 1893-09-02 | 270.39 |
| -100 | 2413519 | 1895-11-21 | 271.26 |
| -99 | 2413791 | 1896-08-19 | 270.46 |
| -96 | 2414596 | 1898-11-02 | 270.04 |
| -95 | 2414874 | 1899-08-07 | 270.32 |
| -92 | 2415690 | 1901-11-01 | 270.46 |
| -91 | 2415940 | 1902-07-09 | 271.82 |
| -88 | 2416767 | 1904-10-13 | 271.9 |
| -87 | 2417030 | 1905-07-03 | 271.42 |
| -84 | 2417853 | 1907-10-04 | 271.88 |
| -72 | 2421135 | 1916-09-28 | 272.93 |
| -69 | 2421930 | 1918-12-02 | 273.22 |
| -68 | 2422205 | 1919-09-03 | 272.94 |
| -64 | 2423291 | 1922-08-24 | 273 |
| -59 | 2424700 | 1926-07-03 | 273.27 |
| -56 | 2425490 | 1928-08-31 | 273.38 |
| -52 | 2426588 | 1931-09-03 | 273.62 |
| -51 | 2426869 | 1932-06-10 | 272.19 |
| -49 | 2427400 | 1933-11-23 | 270.92 |
| -48 | 2427670 | 1934-08-20 | 271.74 |
| -47 | 2427950 | 1935-05-27 | 271.64 |
| -45 | 2428479 | 1936-11-06 | 273.38 |
| -44 | 2428755 | 1937-08-09 | 272.76 |
| -41 | 2429573 | 1939-11-05 | 270.36 |
| -40 | 2429860 | 1940-08-18 | 270.56 |
| -39 | 2430150 | 1941-06-04 | 270.62 |
| -37 | 2430648 | 1942-10-15 | 270.21 |
| -33 | 2431731 | 1945-10-02 | 269.86 |
| -32 | 2432003 | 1946-07-01 | 268.36 |
| -31 | 2432267 | 1947-03-22 | 269.71 |
| -30 | 2432546 | 1947-12-26 | 271.29 |
| -29 | 2432824 | 1948-09-29 | 269.93 |
| -28 | 2433090 | 1949-06-22 | 270.21 |
| -27 | 2433372 | 1950-03-31 | 269.36 |
| -26 | 2433619 | 1950-12-03 | 268.43 |
| -25 | 2433894 | 1951-09-04 | 269.07 |
| -24 | 2434159 | 1952-05-26 | 268.93 |
| -23 | 2434425 | 1953-02-16 | 269.64 |
| -22 | 2434703 | 1953-11-21 | 270.93 |
| -21 | 2434978 | 1954-08-23 | 271.93 |
| -20 | 2435249 | 1955-05-21 | 273.93 |
| -19 | 2435517 | 1956-02-13 | 274.57 |
| -18 | 2435789 | 1956-11-11 | 274.21 |
| -17 | 2436071 | 1957-08-20 | 273.43 |
| -16 | 2436348 | 1958-05-24 | 273.07 |
| -15 | 2436624 | 1959-02-24 | 274.07 |
| -14 | 2436896 | 1959-11-23 | 273.21 |
| -13 | 2437159 | 1960-08-12 | 271.64 |
| -12 | 2437430 | 1961-05-10 | 272.5 |
| -11 | 2437713 | 1962-02-17 | 272.14 |
| -10 | 2437972 | 1962-11-03 | 271.71 |
| -9 | 2438250 | 1963-08-08 | 273.07 |
| -8 | 2438537 | 1964-05-21 | 272.36 |
| -7 | 2438793 | 1965-02-01 | 272.29 |
| -6 | 2439066 | 1965-11-01 | 273.14 |
| -5 | 2439346 | 1966-08-08 | 271.93 |
| -4 | 2439610 | 1967-04-29 | 271.71 |
| -3 | 2439887 | 1968-01-31 | 271.93 |
| -2 | 2440159 | 1968-10-29 | 271.07 |
| -1 | 2440435 | 1969-08-01 | 273.14 |
| 0 | 2440699 | 1970-04-22 | 275.14 |
| 1 | 2440967 | 1971-01-15 | 275.14 |
| 2 | 2441240 | 1971-10-15 | 275.79 |
| 3 | 2441540 | 1972-08-10 | 276.93 |
| 4 | 2441809 | 1973-05-06 | 278.14 |
| 5 | 2442089 | 1974-02-10 | 278.07 |
| 6 | 2442366 | 1974-11-14 | 276.21 |
| 7 | 2442645 | 1975-08-20 | 274.79 |
| 8 | 2442915 | 1976-05-16 | 275.21 |
| 9 | 2443185 | 1977-02-10 | 275 |
| 10 | 2443462 | 1977-11-14 | 273.14 |
| 11 | 2443734 | 1978-08-13 | 271.71 |
| 12 | 2444017 | 1979-05-23 | 273.29 |
| 13 | 2444288 | 1980-02-18 | 272.86 |
| 14 | 2444547 | 1980-11-03 | 271.57 |
| 15 | 2444817 | 1981-07-31 | 272 |
| 16 | 2445109 | 1982-05-19 | 272.07 |
| 17 | 2445358 | 1983-01-23 | 272.79 |
| 18 | 2445640 | 1983-11-01 | 272.43 |
| 19 | 2445919 | 1984-08-06 | 270.07 |
| 20 | 2446195 | 1985-05-09 | 268.71 |
| 21 | 2446459 | 1986-01-28 | 269.64 |
| 22 | 2446719 | 1986-10-15 | 269.36 |
| 23 | 2446988 | 1987-07-11 | 268.93 |
| 24 | 2447241 | 1988-03-20 | 270 |
| 25 | 2447532 | 1989-01-05 | 271 |
| 26 | 2447798 | 1989-09-28 | 272.07 |
| 27 | 2448081 | 1990-07-08 | 274 |
| 28 | 2448353 | 1991-04-06 | 274.43 |
| 29 | 2448619 | 1991-12-28 | 273.29 |
| 30 | 2448897 | 1992-10-01 | 272.5 |
| 31 | 2449168 | 1993-06-29 | 271.64 |
| 32 | 2449447 | 1994-04-04 | 270.86 |
| 33 | 2449709 | 1994-12-22 | 270.07 |
| 34 | 2449985 | 1995-09-24 | 270.57 |
| 35 | 2450252 | 1996-06-17 | 270.57 |
| 36 | 2450512 | 1997-03-04 | 270.21 |
| 37 | 2450785 | 1997-12-02 | 270.07 |
| 38 | 2451068 | 1998-09-11 | 270.21 |
| 39 | 2451335 | 1999-06-05 | 272.14 |
| 40 | 2451604 | 2000-02-29 | 272.79 |
| 41 | 2451871 | 2000-11-22 | 271.21 |
| 42 | 2452149 | 2001-08-27 | 271 |
| 43 | 2452425 | 2002-05-30 | 270.29 |
| 44 | 2452691 | 2003-02-20 | 269.21 |
| 45 | 2452959 | 2003-11-15 | 270.86 |
| 46 | 2453238 | 2004-08-20 | 271.5 |
| 47 | 2453485 | 2005-04-24 | 271.29 |
| 48 | 2453759 | 2006-01-23 | 271.5 |
| 49 | 2454053 | 2006-11-13 | 270.86 |
| 50 | 2454322 | 2007-08-09 | 272.64 |
| 51 | 2454592 | 2008-05-05 | 275.57 |
| 52 | 2454859 | 2009-01-27 | 271.71 |
| 53 | 2455130 | 2009-10-25 | 268.29 |
| 54 | 2455410 | 2010-08-01 | 270.43 |
| 55 | 2455692 | 2011-05-10 | 271.36 |
| 56 | 2455924 | 2011-12-28 | 271.57 |
| 57 | 2456207 | 2012-10-06 | 271.29 |
| 58 | 2456493 | 2013-07-19 | 269.93 |
| 59 | 2456757 | 2014-04-09 | 271.86 |
| 60 | 2457034 | 2015-01-11 | 273.71 |
| 61 | 2457304 | 2015-10-08 | 272.36 |
| 62 | 2457577 | 2016-07-07 | 271.64 |
| 63 | 2457845 | 2017-04-01 | 271.33 |
| 64 | 2458118 | 2017-12-30 | 272.31 |
| 65 | 2458395 | 2018-10-03 | 273.19 |
| 66 | 2458658 | 2019-06-23 | 272.97 |
| 68 | 2459203 | 2020-12-19 | 273.2 |
| 69 | 2459492 | 2021-10-04 | 272.47 |
| 70 | 2459760 | 2022-06-29 | 271.77 |
| 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. |