| E | O (JD) | O (dat) | Period |
| -61 | 2413069 | 1894-08-28 | 423.82 |
| -56 | 2415140 | 1900-04-30 | 424.03 |
| -55 | 2415545 | 1901-06-09 | 424.08 |
| -48 | 2418475 | 1909-06-17 | 423.97 |
| -38 | 2422800 | 1921-04-20 | 423.85 |
| -36 | 2423630 | 1923-07-29 | 423.74 |
| -33 | 2424902 | 1927-01-21 | 424.56 |
| -32 | 2425323 | 1928-03-17 | 424.68 |
| -31 | 2425735 | 1929-05-03 | 424.47 |
| -30 | 2426154 | 1930-06-26 | 418.87 |
| -29 | 2426574 | 1931-08-20 | 417.74 |
| -28 | 2426994 | 1932-10-13 | 416.19 |
| -27 | 2427406 | 1933-11-29 | 415.82 |
| -26 | 2427833 | 1935-01-30 | 415.91 |
| -25 | 2428236 | 1936-03-08 | 416.11 |
| -24 | 2428640 | 1937-04-16 | 415.92 |
| -23 | 2429066 | 1938-06-16 | 416.27 |
| -22 | 2429482 | 1939-08-06 | 417.09 |
| -21 | 2429903 | 1940-09-30 | 417.41 |
| -20 | 2430327 | 1941-11-28 | 418.23 |
| -19 | 2430734 | 1943-01-09 | 419.02 |
| -18 | 2431158 | 1944-03-08 | 418.81 |
| -17 | 2431581 | 1945-05-05 | 419.39 |
| -16 | 2431993 | 1946-06-21 | 419.78 |
| -15 | 2432409 | 1947-08-11 | 420.13 |
| -14 | 2432840 | 1948-10-15 | 420.48 |
| -13 | 2433254 | 1949-12-03 | 420.41 |
| -12 | 2433683 | 1951-02-05 | 420.18 |
| -11 | 2434103 | 1952-03-31 | 420.21 |
| -10 | 2434521 | 1953-05-23 | 420.36 |
| -9 | 2434936 | 1954-07-12 | 420.37 |
| -8 | 2435360 | 1955-09-09 | 420.16 |
| -7 | 2435773 | 1956-10-26 | 420.63 |
| -6 | 2436194 | 1957-12-21 | 421.38 |
| -5 | 2436625 | 1959-02-25 | 422.15 |
| -4 | 2437049 | 1960-04-24 | 422.9 |
| -3 | 2437455 | 1961-06-04 | 423.57 |
| -2 | 2437896 | 1962-08-19 | 423.9 |
| -1 | 2438316 | 1963-10-13 | 423.55 |
| 0 | 2438739 | 1964-12-09 | 422.48 |
| 1 | 2439164 | 1966-02-07 | 422.04 |
| 2 | 2439593 | 1967-04-12 | 423.15 |
| 3 | 2440008 | 1968-05-31 | 424.32 |
| 4 | 2440427 | 1969-07-24 | 425.79 |
| 5 | 2440837 | 1970-09-07 | 426.72 |
| 6 | 2441262 | 1971-11-06 | 427.03 |
| 7 | 2441715 | 1973-02-01 | 426.98 |
| 8 | 2442162 | 1974-04-24 | 427.18 |
| 9 | 2442581 | 1975-06-17 | 427.13 |
| 10 | 2443002 | 1976-08-11 | 425.99 |
| 11 | 2443418 | 1977-10-01 | 423.55 |
| 12 | 2443836 | 1978-11-23 | 420.48 |
| 13 | 2444261 | 1980-01-22 | 418.45 |
| 14 | 2444691 | 1981-03-27 | 417.62 |
| 15 | 2445101 | 1982-05-11 | 417.4 |
| 16 | 2445515 | 1983-06-29 | 416.4 |
| 17 | 2445927 | 1984-08-14 | 414.65 |
| 18 | 2446339 | 1985-09-30 | 413.75 |
| 19 | 2446754 | 1986-11-19 | 414.36 |
| 20 | 2447183 | 1988-01-22 | 415.72 |
| 21 | 2447581 | 1989-02-23 | 416.43 |
| 22 | 2447981 | 1990-03-30 | 416.95 |
| 23 | 2448411 | 1991-06-03 | 417.16 |
| 24 | 2448849 | 1992-08-14 | 417.84 |
| 25 | 2449267 | 1993-10-06 | 419.05 |
| 26 | 2449676 | 1994-11-19 | 420.66 |
| 27 | 2450090 | 1996-01-07 | 421.93 |
| 28 | 2450504 | 1997-02-24 | 422.7 |
| 29 | 2450935 | 1998-05-01 | 423.24 |
| 30 | 2451368 | 1999-07-08 | 424.85 |
| 31 | 2451785 | 2000-08-28 | 425.92 |
| 32 | 2452220 | 2001-11-06 | 427.02 |
| 33 | 2452657 | 2003-01-17 | 427.14 |
| 34 | 2453071 | 2004-03-06 | 426.74 |
| 35 | 2453501 | 2005-05-10 | 426.52 |
| 36 | 2453918 | 2006-07-01 | 426.13 |
| 37 | 2454358 | 2007-09-14 | 425.48 |
| 38 | 2454776 | 2008-11-05 | 424.45 |
| 39 | 2455205 | 2010-01-08 | 424.15 |
| 40 | 2455632 | 2011-03-11 | 423.71 |
| 41 | 2456048 | 2012-04-30 | 423.4 |
| 42 | 2456478 | 2013-07-04 | 422.77 |
| 43 | 2456886 | 2014-08-16 | 421.6 |
| 44 | 2457311 | 2015-10-15 | 420.37 |
| 45 | 2457742 | 2016-12-19 | 418.84 |
| 46 | 2458163 | 2018-02-13 | 418.51 |
| 47 | 2458588 | 2019-04-14 | 417.7 |
| 48 | 2458982 | 2020-05-12 | 417.43 |
| 49 | 2459404 | 2021-07-08 | 415.5 |
| 50 | 2459808 | 2022-08-16 | 412.77 |
| 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. |