| E | O (JD) | O (dat) | Period |
| -91 | 2415431 | 1901-02-15 | 321.9 |
| -90 | 2415760 | 1902-01-10 | 320.42 |
| -89 | 2416080 | 1902-11-26 | 318.66 |
| -88 | 2416390 | 1903-10-02 | 317.27 |
| -87 | 2416720 | 1904-08-27 | 316.57 |
| -86 | 2417033 | 1905-07-06 | 316.36 |
| -85 | 2417350 | 1906-05-19 | 318.36 |
| -84 | 2417648 | 1907-03-13 | 320.57 |
| -83 | 2417975 | 1908-02-03 | 320.29 |
| -82 | 2418294 | 1908-12-18 | 318.5 |
| -81 | 2418633 | 1909-11-22 | 319.22 |
| -80 | 2418965 | 1910-10-20 | 320.89 |
| -79 | 2419272 | 1911-08-23 | 321.94 |
| -76 | 2420207 | 1914-03-15 | 322.72 |
| -75 | 2420537 | 1915-02-08 | 322.22 |
| -74 | 2420862 | 1915-12-30 | 322.78 |
| -73 | 2421202 | 1916-12-04 | 327.31 |
| -72 | 2421534 | 1917-11-01 | 330.36 |
| -71 | 2421864 | 1918-09-27 | 328.36 |
| -70 | 2422183 | 1919-08-12 | 327.79 |
| -69 | 2422533 | 1920-07-27 | 327.14 |
| -68 | 2422836 | 1921-05-26 | 326.93 |
| -67 | 2423160 | 1922-04-15 | 326.29 |
| -66 | 2423493 | 1923-03-14 | 324.43 |
| -65 | 2423823 | 1924-02-07 | 325.07 |
| -64 | 2424152 | 1925-01-01 | 327.86 |
| -63 | 2424463 | 1925-11-08 | 327.64 |
| -62 | 2424795 | 1926-10-06 | 327.29 |
| -61 | 2425125 | 1927-09-01 | 328.29 |
| -60 | 2425461 | 1928-08-02 | 329.07 |
| -59 | 2425779 | 1929-06-16 | 329.29 |
| -58 | 2426119 | 1930-05-22 | 328.07 |
| -57 | 2426452 | 1931-04-20 | 326.21 |
| -56 | 2426770 | 1932-03-03 | 327.14 |
| -55 | 2427098 | 1933-01-25 | 328.29 |
| -54 | 2427415 | 1933-12-08 | 327.64 |
| -53 | 2427738 | 1934-10-27 | 328.07 |
| -52 | 2428082 | 1935-10-06 | 328.64 |
| -51 | 2428412 | 1936-08-31 | 329.21 |
| -50 | 2428746 | 1937-07-31 | 330 |
| -49 | 2429069 | 1938-06-19 | 328.57 |
| -48 | 2429400 | 1939-05-16 | 326.93 |
| -47 | 2429722 | 1940-04-02 | 326.93 |
| -46 | 2430051 | 1941-02-25 | 327.14 |
| -45 | 2430369 | 1942-01-09 | 327 |
| -44 | 2430702 | 1942-12-08 | 326.5 |
| -43 | 2431033 | 1943-11-04 | 326.14 |
| -42 | 2431362 | 1944-09-28 | 326.14 |
| -41 | 2431685 | 1945-08-17 | 325.64 |
| -40 | 2432008 | 1946-07-06 | 325.36 |
| -39 | 2432331 | 1947-05-25 | 325.29 |
| -38 | 2432655 | 1948-04-13 | 325.07 |
| -37 | 2432975 | 1949-02-27 | 325.5 |
| -36 | 2433315 | 1950-02-02 | 326.21 |
| -35 | 2433634 | 1950-12-18 | 327 |
| -34 | 2433964 | 1951-11-13 | 326.93 |
| -33 | 2434286 | 1952-09-30 | 325.93 |
| -32 | 2434620 | 1953-08-30 | 325.14 |
| -31 | 2434944 | 1954-07-20 | 326.36 |
| -30 | 2435263 | 1955-06-04 | 327.57 |
| -29 | 2435590 | 1956-04-26 | 326.36 |
| -28 | 2435911 | 1957-03-13 | 325.57 |
| -27 | 2436256 | 1958-02-21 | 326.64 |
| -26 | 2436580 | 1959-01-11 | 326 |
| -25 | 2436895 | 1959-11-22 | 324.79 |
| -24 | 2437227 | 1960-10-19 | 322.36 |
| -23 | 2437553 | 1961-09-10 | 320.79 |
| -22 | 2437864 | 1962-07-18 | 321.71 |
| -21 | 2438184 | 1963-06-03 | 321 |
| -20 | 2438496 | 1964-04-10 | 319.93 |
| -19 | 2438831 | 1965-03-11 | 320.57 |
| -18 | 2439148 | 1966-01-22 | 321.79 |
| -17 | 2439468 | 1966-12-08 | 323.36 |
| -16 | 2439791 | 1967-10-27 | 324 |
| -15 | 2440114 | 1968-09-14 | 324.14 |
| -14 | 2440439 | 1969-08-05 | 326.07 |
| -13 | 2440768 | 1970-06-30 | 327.36 |
| -12 | 2441095 | 1971-05-23 | 328 |
| -11 | 2441422 | 1972-04-14 | 328.79 |
| -10 | 2441759 | 1973-03-17 | 329.93 |
| -9 | 2442083 | 1974-02-04 | 332 |
| -8 | 2442414 | 1975-01-01 | 333.43 |
| -7 | 2442742 | 1975-11-25 | 334.07 |
| -6 | 2443084 | 1976-11-01 | 335.5 |
| -5 | 2443427 | 1977-10-10 | 335.79 |
| -4 | 2443758 | 1978-09-06 | 334.64 |
| -3 | 2444100 | 1979-08-14 | 333.71 |
| -2 | 2444439 | 1980-07-18 | 332.5 |
| -1 | 2444759 | 1981-06-03 | 331.86 |
| 0 | 2445082 | 1982-04-22 | 331.29 |
| 1 | 2445416 | 1983-03-22 | 330.79 |
| 2 | 2445750 | 1984-02-19 | 331.79 |
| 3 | 2446081 | 1985-01-15 | 332.79 |
| 4 | 2446415 | 1985-12-15 | 333.29 |
| 5 | 2446755 | 1986-11-20 | 332.71 |
| 6 | 2447088 | 1987-10-19 | 333.14 |
| 7 | 2447412 | 1988-09-07 | 333.21 |
| 8 | 2447752 | 1989-08-13 | 331.71 |
| 9 | 2448072 | 1990-06-29 | 330.86 |
| 10 | 2448423 | 1991-06-15 | 330.64 |
| 11 | 2448738 | 1992-04-25 | 330 |
| 12 | 2449076 | 1993-03-29 | 329.43 |
| 13 | 2449399 | 1994-02-15 | 327.86 |
| 14 | 2449730 | 1995-01-12 | 326.5 |
| 15 | 2450054 | 1995-12-02 | 326.36 |
| 16 | 2450382 | 1996-10-25 | 326.07 |
| 17 | 2450703 | 1997-09-11 | 326.07 |
| 18 | 2451029 | 1998-08-03 | 326.29 |
| 19 | 2451354 | 1999-06-24 | 326.79 |
| 20 | 2451686 | 2000-05-21 | 326.14 |
| 21 | 2452008 | 2001-04-08 | 325.36 |
| 22 | 2452344 | 2002-03-10 | 324.07 |
| 23 | 2452667 | 2003-01-27 | 323.43 |
| 24 | 2452984 | 2003-12-10 | 323.71 |
| 25 | 2453303 | 2004-10-24 | 323 |
| 26 | 2453617 | 2005-09-03 | 321.36 |
| 27 | 2453951 | 2006-08-03 | 319.86 |
| 28 | 2454275 | 2007-06-23 | 319.93 |
| 29 | 2454599 | 2008-05-12 | 320.71 |
| 30 | 2454911 | 2009-03-20 | 319.86 |
| 31 | 2455218 | 2010-01-21 | 319.14 |
| 32 | 2455548 | 2010-12-17 | 318.36 |
| 33 | 2455862 | 2011-10-27 | 318.36 |
| 34 | 2456184 | 2012-09-13 | 320.29 |
| 35 | 2456510 | 2013-08-05 | 320.5 |
| 36 | 2456821 | 2014-06-12 | 320.29 |
| 37 | 2457146 | 2015-05-03 | 321.36 |
| 38 | 2457467 | 2016-03-19 | 321.79 |
| 39 | 2457786 | 2017-02-01 | 323 |
| 40 | 2458108 | 2017-12-20 | 325.57 |
| 41 | 2458437 | 2018-11-14 | 327.21 |
| 42 | 2458762 | 2019-10-05 | 327.52 |
| 43 | 2459091 | 2020-08-29 | 328.51 |
| 44 | 2459434 | 2021-08-07 | 329.75 |
| 45 | 2459760 | 2022-06-29 | 329.9 |
| 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. |