| E | O (JD) | O (dat) | Period |
| -73 | 2412441 | 1892-12-08 | 379.95 |
| -70 | 2413540 | 1895-12-12 | 375.8 |
| -69 | 2413950 | 1897-01-25 | 373.66 |
| -68 | 2414350 | 1898-03-01 | 375.09 |
| -66 | 2415090 | 1900-03-11 | 377.1 |
| -62 | 2416560 | 1904-03-20 | 377.82 |
| -59 | 2417690 | 1907-04-24 | 375.24 |
| -57 | 2418450 | 1909-05-23 | 374.21 |
| -56 | 2418844 | 1910-06-21 | 375.8 |
| -55 | 2419225 | 1911-07-07 | 378 |
| -53 | 2419957 | 1913-07-08 | 377.64 |
| -52 | 2420335 | 1914-07-21 | 375.99 |
| -51 | 2420710 | 1915-07-31 | 375.06 |
| -50 | 2421100 | 1916-08-24 | 375.87 |
| -49 | 2421460 | 1917-08-19 | 377.72 |
| -48 | 2421850 | 1918-09-13 | 377.49 |
| -47 | 2422220 | 1919-09-18 | 376.78 |
| -46 | 2422600 | 1920-10-02 | 376.07 |
| -45 | 2422980 | 1921-10-17 | 373.94 |
| -44 | 2423350 | 1922-10-22 | 373.5 |
| -43 | 2423735 | 1923-11-11 | 375.64 |
| -42 | 2424090 | 1924-10-31 | 375.35 |
| -41 | 2424455 | 1925-10-31 | 373.13 |
| -40 | 2424844 | 1926-11-24 | 373.26 |
| -39 | 2425235 | 1927-12-20 | 375.44 |
| -38 | 2425600 | 1928-12-19 | 376.68 |
| -36 | 2426327 | 1930-12-16 | 375.56 |
| -35 | 2426730 | 1932-01-23 | 372.32 |
| -34 | 2427102 | 1933-01-29 | 370.94 |
| -33 | 2427470 | 1934-02-01 | 372 |
| -32 | 2427838 | 1935-02-04 | 370.71 |
| -31 | 2428198 | 1936-01-30 | 366.79 |
| -30 | 2428572 | 1937-02-07 | 367.37 |
| -29 | 2428935 | 1938-02-05 | 368 |
| -28 | 2429312 | 1939-02-17 | 363.99 |
| -27 | 2429655 | 1940-01-26 | 365.44 |
| -26 | 2430060 | 1941-03-06 | 368.59 |
| -25 | 2430400 | 1942-02-09 | 367.55 |
| -24 | 2430732 | 1943-01-07 | 365.87 |
| -19 | 2432616 | 1948-03-05 | 364.91 |
| -18 | 2433000 | 1949-03-24 | 365.68 |
| -17 | 2433333 | 1950-02-20 | 367.91 |
| -16 | 2433683 | 1951-02-05 | 367.39 |
| -15 | 2434060 | 1952-02-17 | 367.22 |
| -14 | 2434445 | 1953-03-08 | 368.86 |
| -13 | 2434781 | 1954-02-07 | 372.07 |
| -12 | 2435180 | 1955-03-13 | 374.6 |
| -11 | 2435577 | 1956-04-13 | 373.73 |
| -10 | 2435920 | 1957-03-22 | 374.66 |
| -9 | 2436305 | 1958-04-11 | 375.54 |
| -2 | 2438930 | 1965-06-18 | 373.5 |
| -1 | 2439292 | 1966-06-15 | 373.11 |
| 0 | 2439675 | 1967-07-03 | 373.66 |
| 1 | 2440050 | 1968-07-12 | 373.15 |
| 2 | 2440418 | 1969-07-15 | 372.92 |
| 3 | 2440780 | 1970-07-12 | 372.57 |
| 4 | 2441160 | 1971-07-27 | 371.5 |
| 5 | 2441538 | 1972-08-08 | 372.29 |
| 6 | 2441905 | 1973-08-10 | 373.86 |
| 7 | 2442278 | 1974-08-18 | 374.07 |
| 8 | 2442648 | 1975-08-23 | 375.35 |
| 9 | 2443032 | 1976-09-10 | 376.72 |
| 10 | 2443400 | 1977-09-13 | 380.58 |
| 11 | 2443777 | 1978-09-25 | 381.72 |
| 12 | 2444176 | 1979-10-29 | 378.92 |
| 13 | 2444541 | 1980-10-28 | 381.64 |
| 14 | 2444970 | 1981-12-31 | 382.36 |
| 15 | 2445300 | 1982-11-26 | 380.37 |
| 16 | 2445685 | 1983-12-16 | 380.07 |
| 17 | 2446090 | 1985-01-24 | 375.64 |
| 18 | 2446440 | 1986-01-09 | 374.15 |
| 19 | 2446838 | 1987-02-11 | 375.2 |
| 20 | 2447200 | 1988-02-08 | 373.48 |
| 21 | 2447570 | 1989-02-12 | 373 |
| 28 | 2450183 | 1996-04-09 | 372.03 |
| 29 | 2450557 | 1997-04-18 | 371.22 |
| 31 | 2451302 | 1999-05-03 | 371.07 |
| 32 | 2451672 | 2000-05-07 | 367.88 |
| 33 | 2452023 | 2001-04-23 | 365.25 |
| 34 | 2452409 | 2002-05-14 | 364.11 |
| 36 | 2453122 | 2004-04-26 | 362.36 |
| 39 | 2454196 | 2007-04-05 | 362.86 |
| 42 | 2455310 | 2010-04-23 | 362.78 |
| 45 | 2456380 | 2013-03-28 | 362.22 |
| 46 | 2456740 | 2014-03-23 | 363.46 |
| 47 | 2457115 | 2015-04-02 | 363.95 |
| 48 | 2457475 | 2016-03-27 | 365 |
| 49 | 2457836 | 2017-03-23 | 368.22 |
| 50 | 2458205 | 2018-03-27 | 370.94 |
| 51 | 2458580 | 2019-04-06 | 371.7 |
| 52 | 2458950 | 2020-04-10 | 371.73 |
| 53 | 2459325 | 2021-04-20 | 374.66 |
| 54 | 2459723 | 2022-05-23 | 375.8 |
| 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. |