| E | O (JD) | O (dat) | Period |
| -17 | 2409790 | 1885-09-05 | 409.9 |
| -14 | 2410997 | 1888-12-25 | 409.79 |
| -10 | 2412687 | 1893-08-11 | 409.47 |
| -9 | 2413100 | 1894-09-28 | 409.23 |
| -8 | 2413488 | 1895-10-21 | 409.8 |
| 16 | 2423322 | 1922-09-24 | 409.62 |
| 17 | 2423715 | 1923-10-22 | 409.12 |
| 18 | 2424117 | 1924-11-27 | 409.8 |
| 19 | 2424536 | 1926-01-20 | 410.89 |
| 20 | 2424954 | 1927-03-14 | 414.72 |
| 21 | 2425380 | 1928-05-13 | 416.65 |
| 22 | 2425796 | 1929-07-03 | 417 |
| 23 | 2426217 | 1930-08-28 | 416.05 |
| 24 | 2426626 | 1931-10-11 | 415.4 |
| 25 | 2427039 | 1932-11-27 | 414.7 |
| 29 | 2428703 | 1937-06-18 | 412.55 |
| 30 | 2429108 | 1938-07-28 | 411.68 |
| 31 | 2429534 | 1939-09-27 | 411.93 |
| 32 | 2429936 | 1940-11-02 | 410.77 |
| 33 | 2430328 | 1941-11-29 | 409.79 |
| 39 | 2432807 | 1948-09-12 | 411.46 |
| 40 | 2433216 | 1949-10-26 | 412.79 |
| 41 | 2433617 | 1950-12-01 | 413.46 |
| 42 | 2434029 | 1952-01-17 | 413.89 |
| 43 | 2434488 | 1953-04-20 | 412.85 |
| 44 | 2434889 | 1954-05-26 | 413 |
| 45 | 2435298 | 1955-07-09 | 413.86 |
| 46 | 2435701 | 1956-08-15 | 410.5 |
| 47 | 2436102 | 1957-09-20 | 407.71 |
| 48 | 2436513 | 1958-11-05 | 408.5 |
| 49 | 2436927 | 1959-12-24 | 407.65 |
| 50 | 2437337 | 1961-02-06 | 406.65 |
| 51 | 2437748 | 1962-03-24 | 406.65 |
| 52 | 2438158 | 1963-05-08 | 406.07 |
| 53 | 2438548 | 1964-06-01 | 404.85 |
| 54 | 2438948 | 1965-07-06 | 404.29 |
| 55 | 2439360 | 1966-08-22 | 404.79 |
| 56 | 2439765 | 1967-10-01 | 406.47 |
| 57 | 2440167 | 1968-11-06 | 408.12 |
| 58 | 2440578 | 1969-12-22 | 406.75 |
| 59 | 2440995 | 1971-02-12 | 404.94 |
| 61 | 2441808 | 1973-05-05 | 405.94 |
| 62 | 2442218 | 1974-06-19 | 404.43 |
| 63 | 2442598 | 1975-07-04 | 404.37 |
| 64 | 2443006 | 1976-08-15 | 406.73 |
| 65 | 2443421 | 1977-10-04 | 407.5 |
| 66 | 2443795 | 1978-10-13 | 411.22 |
| 67 | 2444248 | 1980-01-09 | 415.5 |
| 68 | 2444656 | 1981-02-20 | 417.78 |
| 69 | 2445075 | 1982-04-15 | 422.43 |
| 70 | 2445498 | 1983-06-12 | 422.15 |
| 71 | 2445923 | 1984-08-10 | 418.43 |
| 72 | 2446353 | 1985-10-14 | 421.78 |
| 73 | 2446777 | 1986-12-12 | 425.07 |
| 74 | 2447176 | 1988-01-15 | 424.93 |
| 75 | 2447586 | 1989-02-28 | 423.36 |
| 76 | 2448050 | 1990-06-07 | 421.07 |
| 77 | 2448474 | 1991-08-05 | 421.07 |
| 78 | 2448896 | 1992-09-30 | 422.28 |
| 79 | 2449307 | 1993-11-15 | 417.22 |
| 80 | 2449718 | 1994-12-31 | 410.5 |
| 81 | 2450130 | 1996-02-16 | 406.86 |
| 82 | 2450544 | 1997-04-05 | 404.64 |
| 83 | 2450933 | 1998-04-29 | 404.5 |
| 84 | 2451338 | 1999-06-08 | 402.86 |
| 85 | 2451728 | 2000-07-02 | 401.15 |
| 86 | 2452140 | 2001-08-18 | 399.36 |
| 87 | 2452548 | 2002-09-30 | 401.07 |
| 88 | 2452940 | 2003-10-27 | 399.5 |
| 89 | 2453350 | 2004-12-10 | 393.86 |
| 90 | 2453718 | 2005-12-13 | 392.36 |
| 91 | 2454168 | 2007-03-08 | 392.79 |
| 92 | 2454491 | 2008-01-25 | 393 |
| 93 | 2454891 | 2009-02-28 | 394.92 |
| 94 | 2455290 | 2010-04-03 | 394.5 |
| 95 | 2455697 | 2011-05-15 | 395.72 |
| 96 | 2456095 | 2012-06-16 | 402.22 |
| 97 | 2456502 | 2013-07-28 | 404 |
| 98 | 2456907 | 2014-09-06 | 406.35 |
| 99 | 2457292 | 2015-09-26 | 411.07 |
| 100 | 2457721 | 2016-11-28 | 412.86 |
| 101 | 2458116 | 2017-12-28 | 413.93 |
| 102 | 2458560 | 2019-03-17 | 417.11 |
| 103 | 2458987 | 2020-05-17 | 419.11 |
| 104 | 2459390 | 2021-06-24 | 423.09 |
| 105 | 2459814 | 2022-08-22 | 428.72 |
| 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. |