| E | O (JD) | O (dat) | Period |
| -97 | 2415470 | 1901-03-26 | 237.71 |
| -95 | 2415949 | 1902-07-18 | 238 |
| -94 | 2416190 | 1903-03-16 | 237.33 |
| -92 | 2416655 | 1904-06-23 | 237.17 |
| -91 | 2416898 | 1905-02-21 | 237.06 |
| -86 | 2418090 | 1908-05-28 | 236.85 |
| -83 | 2418789 | 1910-04-27 | 237.06 |
| -80 | 2419508 | 1912-04-15 | 236.79 |
| -78 | 2419971 | 1913-07-22 | 235.61 |
| -77 | 2420221 | 1914-03-29 | 234.93 |
| -75 | 2420684 | 1915-07-05 | 234.74 |
| -74 | 2420920 | 1916-02-26 | 234.64 |
| -72 | 2421372 | 1917-05-23 | 235.27 |
| -69 | 2422085 | 1919-05-06 | 234.72 |
| -67 | 2422550 | 1920-08-13 | 234.43 |
| -66 | 2422795 | 1921-04-15 | 235.64 |
| -63 | 2423514 | 1923-04-04 | 236.84 |
| -61 | 2423963 | 1924-06-26 | 237.58 |
| -60 | 2424205 | 1925-02-23 | 238 |
| -58 | 2424685 | 1926-06-18 | 237.52 |
| -57 | 2424930 | 1927-02-18 | 238.43 |
| -55 | 2425407 | 1928-06-09 | 239.15 |
| -54 | 2425650 | 1929-02-07 | 238.62 |
| -52 | 2426122 | 1930-05-25 | 238.19 |
| -51 | 2426362 | 1931-01-20 | 237.6 |
| -49 | 2426828 | 1932-04-30 | 237.46 |
| -48 | 2427073 | 1932-12-31 | 237.23 |
| -46 | 2427544 | 1934-04-16 | 237.41 |
| -44 | 2428020 | 1935-08-05 | 238.05 |
| -43 | 2428261 | 1936-04-02 | 238.18 |
| -41 | 2428730 | 1937-07-15 | 237.95 |
| -40 | 2428977 | 1938-03-19 | 237.95 |
| -38 | 2429450 | 1939-07-05 | 237.38 |
| -37 | 2429691 | 1940-03-02 | 237.18 |
| -35 | 2430161 | 1941-06-15 | 236.52 |
| -34 | 2430400 | 1942-02-09 | 236.44 |
| -32 | 2430866 | 1943-05-21 | 236.48 |
| -29 | 2431580 | 1945-05-04 | 237.12 |
| -27 | 2432040 | 1946-08-07 | 237.56 |
| -26 | 2432298 | 1947-04-22 | 236.26 |
| -24 | 2432755 | 1948-07-22 | 236.33 |
| -23 | 2433025 | 1949-04-18 | 236.79 |
| -21 | 2433475 | 1950-07-12 | 236.85 |
| -6 | 2437005 | 1960-03-11 | 237 |
| -3 | 2437730 | 1962-03-06 | 236.77 |
| 0 | 2438440 | 1964-02-14 | 236.77 |
| 5 | 2439635 | 1967-05-24 | 237.66 |
| 6 | 2439875 | 1968-01-19 | 237.79 |
| 8 | 2440348 | 1969-05-06 | 237.42 |
| 9 | 2440595 | 1970-01-08 | 237.18 |
| 11 | 2441055 | 1971-04-13 | 236.24 |
| 14 | 2441765 | 1973-03-23 | 235.88 |
| 16 | 2442240 | 1974-07-11 | 235.88 |
| 17 | 2442476 | 1975-03-04 | 236.2 |
| 19 | 2442940 | 1976-06-10 | 236.08 |
| 20 | 2443180 | 1977-02-05 | 235.68 |
| 22 | 2443660 | 1978-05-31 | 235.82 |
| 23 | 2443895 | 1979-01-21 | 236.27 |
| 25 | 2444355 | 1980-04-25 | 236.55 |
| 27 | 2444835 | 1981-08-18 | 236.86 |
| 28 | 2445069 | 1982-04-09 | 236.95 |
| 30 | 2445545 | 1983-07-29 | 237.37 |
| 31 | 2445779 | 1984-03-19 | 238.1 |
| 33 | 2446272 | 1985-07-25 | 237.95 |
| 34 | 2446496 | 1986-03-06 | 238 |
| 36 | 2446976 | 1987-06-29 | 238.24 |
| 37 | 2447214 | 1988-02-22 | 237.66 |
| 39 | 2447687 | 1989-06-09 | 236.67 |
| 40 | 2447925 | 1990-02-02 | 236.24 |
| 42 | 2448402 | 1991-05-25 | 235.75 |
| 43 | 2448640 | 1992-01-18 | 235.9 |
| 45 | 2449098 | 1993-04-20 | 236.16 |
| 46 | 2449335 | 1993-12-13 | 235.69 |
| 47 | 2449570 | 1994-08-05 | 235.63 |
| 48 | 2449813 | 1995-04-05 | 236.52 |
| 50 | 2450286 | 1996-07-21 | 238.05 |
| 51 | 2450519 | 1997-03-11 | 238.65 |
| 53 | 2451000 | 1998-07-05 | 238.14 |
| 54 | 2451232 | 1999-02-22 | 238.14 |
| 56 | 2451724 | 2000-06-28 | 238.25 |
| 57 | 2451954 | 2001-02-13 | 237.9 |
| 59 | 2452430 | 2002-06-04 | 237.61 |
| 60 | 2452670 | 2003-01-30 | 236.56 |
| 61 | 2452900 | 2003-09-17 | 236.72 |
| 62 | 2453139 | 2004-05-13 | 237.71 |
| 63 | 2453370 | 2004-12-30 | 237.13 |
| 65 | 2453844 | 2006-04-18 | 236.7 |
| 66 | 2454095 | 2006-12-25 | 236.61 |
| 67 | 2454330 | 2007-08-17 | 237.42 |
| 68 | 2454564 | 2008-04-07 | 237.94 |
| 70 | 2455030 | 2009-07-17 | 237.1 |
| 71 | 2455268 | 2010-03-12 | 236.45 |
| 73 | 2455752 | 2011-07-09 | 236.95 |
| 74 | 2455983 | 2012-02-25 | 237.89 |
| 76 | 2456461 | 2013-06-17 | 238.05 |
| 77 | 2456693 | 2014-02-04 | 237.89 |
| 78 | 2456940 | 2014-10-09 | 237.76 |
| 79 | 2457174 | 2015-05-31 | 237.6 |
| 80 | 2457409 | 2016-01-21 | 237.85 |
| 81 | 2457655 | 2016-09-23 | 237 |
| 82 | 2457884 | 2017-05-10 | 235.51 |
| 83 | 2458124 | 2018-01-05 | 236.22 |
| 84 | 2458360 | 2018-08-29 | 235.79 |
| 85 | 2458591 | 2019-04-17 | 235.06 |
| 86 | 2458820 | 2019-12-02 | 236.07 |
| 87 | 2459070 | 2020-08-08 | 235.77 |
| 88 | 2459295 | 2021-03-21 | 235.45 |
| 89 | 2459535 | 2021-11-16 | 237.99 |
| 90 | 2459778 | 2022-07-17 | 239.8 |
| 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. |