| E | O (JD) | O (dat) | Period |
| -88 | 2412750 | 1893-10-13 | 331.39 |
| -82 | 2414740 | 1899-03-26 | 332.02 |
| -80 | 2415400 | 1901-01-15 | 332.44 |
| -79 | 2415730 | 1901-12-11 | 333.46 |
| -78 | 2416063 | 1902-11-09 | 334.17 |
| -77 | 2416398 | 1903-10-10 | 334.6 |
| -76 | 2416742 | 1904-09-18 | 336.35 |
| -75 | 2417075 | 1905-08-17 | 337.18 |
| -72 | 2418090 | 1908-05-28 | 337.62 |
| -71 | 2418430 | 1909-05-03 | 338.23 |
| -70 | 2418765 | 1910-04-03 | 339.02 |
| -69 | 2419100 | 1911-03-04 | 339.33 |
| -68 | 2419440 | 1912-02-07 | 340.24 |
| -67 | 2419780 | 1913-01-12 | 340.35 |
| -66 | 2420130 | 1913-12-28 | 338.88 |
| -65 | 2420480 | 1914-12-13 | 338.18 |
| -64 | 2420810 | 1915-11-08 | 337.6 |
| -63 | 2421156 | 1916-10-19 | 336.94 |
| -62 | 2421480 | 1917-09-08 | 336.39 |
| -56 | 2423500 | 1923-03-21 | 335.93 |
| -55 | 2423835 | 1924-02-19 | 335.68 |
| -54 | 2424170 | 1925-01-19 | 335.55 |
| -53 | 2424503 | 1925-12-18 | 335.19 |
| -52 | 2424840 | 1926-11-20 | 335.14 |
| -51 | 2425180 | 1927-10-26 | 334.61 |
| -50 | 2425515 | 1928-09-25 | 334.32 |
| -45 | 2427185 | 1933-04-22 | 334.19 |
| -44 | 2427516 | 1934-03-19 | 333.99 |
| -43 | 2427850 | 1935-02-16 | 333.43 |
| -42 | 2428184 | 1936-01-16 | 332.79 |
| -41 | 2428512 | 1936-12-09 | 332.01 |
| -40 | 2428851 | 1937-11-13 | 331.15 |
| -39 | 2429182 | 1938-10-10 | 331.18 |
| -38 | 2429505 | 1939-08-29 | 331.35 |
| -37 | 2429835 | 1940-07-24 | 331.97 |
| -36 | 2430161 | 1941-06-15 | 332.35 |
| -35 | 2430501 | 1942-05-21 | 332.9 |
| -34 | 2430835 | 1943-04-20 | 333.85 |
| -33 | 2431171 | 1944-03-21 | 335.24 |
| -32 | 2431511 | 1945-02-24 | 335.69 |
| -31 | 2431837 | 1946-01-16 | 336.37 |
| -30 | 2432178 | 1946-12-23 | 335.83 |
| -29 | 2432513 | 1947-11-23 | 336.58 |
| -28 | 2432858 | 1948-11-02 | 336.92 |
| -27 | 2433185 | 1949-09-25 | 337.12 |
| -26 | 2433530 | 1950-09-05 | 337.39 |
| -19 | 2435870 | 1957-01-31 | 337.59 |
| -18 | 2436230 | 1958-01-26 | 338 |
| -17 | 2436566 | 1958-12-28 | 338.35 |
| -16 | 2436902 | 1959-11-29 | 339.25 |
| -15 | 2437241 | 1960-11-02 | 339.65 |
| -14 | 2437588 | 1961-10-15 | 341.74 |
| -13 | 2437934 | 1962-09-26 | 340.75 |
| -12 | 2438274 | 1963-09-01 | 340.84 |
| -11 | 2438623 | 1964-08-15 | 340.78 |
| -10 | 2438947 | 1965-07-05 | 340.63 |
| -9 | 2439293 | 1966-06-16 | 340.01 |
| -8 | 2439628 | 1967-05-17 | 339.82 |
| -7 | 2439971 | 1968-04-24 | 339.72 |
| -6 | 2440313 | 1969-04-01 | 339.65 |
| -5 | 2440657 | 1970-03-11 | 340.35 |
| -4 | 2440991 | 1971-02-08 | 340.24 |
| -3 | 2441334 | 1972-01-17 | 340.61 |
| -2 | 2441670 | 1972-12-18 | 339.79 |
| -1 | 2442010 | 1973-11-23 | 339.27 |
| 0 | 2442355 | 1974-11-03 | 338.79 |
| 1 | 2442695 | 1975-10-09 | 338.42 |
| 2 | 2443040 | 1976-09-18 | 337.83 |
| 7 | 2444725 | 1981-04-30 | 337.47 |
| 9 | 2445400 | 1983-03-06 | 336.99 |
| 10 | 2445732 | 1984-02-01 | 336.34 |
| 11 | 2446065 | 1984-12-30 | 335.26 |
| 12 | 2446395 | 1985-11-25 | 334.11 |
| 13 | 2446735 | 1986-10-31 | 332.66 |
| 14 | 2447070 | 1987-10-01 | 331.85 |
| 15 | 2447400 | 1988-08-26 | 331.12 |
| 16 | 2447714 | 1989-07-06 | 330.47 |
| 17 | 2448055 | 1990-06-12 | 328.88 |
| 19 | 2448725 | 1992-04-12 | 327.58 |
| 20 | 2449049 | 1993-03-02 | 327.85 |
| 22 | 2449702 | 1994-12-15 | 334.12 |
| 23 | 2450030 | 1995-11-08 | 335.76 |
| 24 | 2450330 | 1996-09-03 | 336.5 |
| 25 | 2450660 | 1997-07-30 | 337.06 |
| 26 | 2451020 | 1998-07-25 | 337.72 |
| 42 | 2456430 | 2013-05-17 | 338.17 |
| 43 | 2456782 | 2014-05-04 | 338.55 |
| 44 | 2457120 | 2015-04-07 | 338.98 |
| 45 | 2457450 | 2016-03-02 | 338.77 |
| 46 | 2457798 | 2017-02-13 | 338.13 |
| 47 | 2458119 | 2017-12-31 | 337.38 |
| 48 | 2458463 | 2018-12-10 | 336.78 |
| 49 | 2458800 | 2019-11-12 | 336.93 |
| 50 | 2459130 | 2020-10-07 | 337.36 |
| 51 | 2459475 | 2021-09-17 | 337.21 |
| 52 | 2459819 | 2022-08-27 | 339.03 |
| 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. |