| E | O (JD) | O (dat) | Period |
| -91 | 2414930 | 1899-10-02 | 305.25 |
| -90 | 2415230 | 1900-07-29 | 305.42 |
| -89 | 2415550 | 1901-06-14 | 305.37 |
| -85 | 2416770 | 1904-10-16 | 305.62 |
| -84 | 2417070 | 1905-08-12 | 306.25 |
| -83 | 2417377 | 1906-06-15 | 306.9 |
| -82 | 2417680 | 1907-04-14 | 307.09 |
| -79 | 2418600 | 1909-10-20 | 307.5 |
| -78 | 2418910 | 1910-08-26 | 307.65 |
| -72 | 2420770 | 1915-09-29 | 307.71 |
| -71 | 2421070 | 1916-07-25 | 307.95 |
| -66 | 2422610 | 1920-10-12 | 307.75 |
| -64 | 2423220 | 1922-06-14 | 307.43 |
| -63 | 2423530 | 1923-04-20 | 307.34 |
| -59 | 2424760 | 1926-09-01 | 307.86 |
| -58 | 2425060 | 1927-06-28 | 308.46 |
| -57 | 2425380 | 1928-05-13 | 308.46 |
| -56 | 2425680 | 1929-03-09 | 308.08 |
| -53 | 2426620 | 1931-10-05 | 308.16 |
| -51 | 2427230 | 1933-06-06 | 308.15 |
| -50 | 2427540 | 1934-04-12 | 307.58 |
| -46 | 2428760 | 1937-08-14 | 307.3 |
| -45 | 2429072 | 1938-06-22 | 307.19 |
| -44 | 2429380 | 1939-04-26 | 307.5 |
| -40 | 2430600 | 1942-08-28 | 308.06 |
| -39 | 2430919 | 1943-07-13 | 307.5 |
| -38 | 2431225 | 1944-05-14 | 306.92 |
| -33 | 2432770 | 1948-08-06 | 307.12 |
| -32 | 2433080 | 1949-06-12 | 307 |
| -21 | 2436437 | 1958-08-21 | 307.06 |
| -20 | 2436747 | 1959-06-27 | 307.31 |
| -15 | 2438282 | 1963-09-09 | 306.88 |
| -14 | 2438587 | 1964-07-10 | 307.06 |
| -13 | 2438910 | 1965-05-29 | 307.6 |
| -6 | 2441065 | 1971-04-23 | 307.59 |
| -3 | 2441970 | 1973-10-14 | 307.85 |
| -2 | 2442286 | 1974-08-26 | 307.56 |
| -1 | 2442587 | 1975-06-23 | 307.29 |
| 0 | 2442900 | 1976-05-01 | 308.2 |
| 3 | 2443820 | 1978-11-07 | 309.05 |
| 4 | 2444134 | 1979-09-17 | 309 |
| 5 | 2444445 | 1980-07-24 | 309.05 |
| 6 | 2444754 | 1981-05-29 | 309.37 |
| 7 | 2445065 | 1982-04-05 | 309.5 |
| 8 | 2445370 | 1983-02-04 | 309.78 |
| 9 | 2445680 | 1983-12-11 | 310.36 |
| 10 | 2445990 | 1984-10-16 | 309.44 |
| 11 | 2446297 | 1985-08-19 | 309.15 |
| 12 | 2446619 | 1986-07-07 | 309.5 |
| 13 | 2446925 | 1987-05-09 | 309.5 |
| 14 | 2447226 | 1988-03-05 | 309.42 |
| 15 | 2447537 | 1989-01-10 | 308 |
| 16 | 2447846 | 1989-11-15 | 307.28 |
| 17 | 2448157 | 1990-09-22 | 308.64 |
| 18 | 2448462 | 1991-07-24 | 310 |
| 19 | 2448766 | 1992-05-23 | 310.36 |
| 20 | 2449080 | 1993-04-02 | 309.51 |
| 21 | 2449392 | 1994-02-08 | 309.3 |
| 22 | 2449711 | 1994-12-24 | 309.86 |
| 23 | 2450017 | 1995-10-26 | 309.64 |
| 24 | 2450319 | 1996-08-23 | 310.07 |
| 25 | 2450630 | 1997-06-30 | 309.5 |
| 26 | 2450936 | 1998-05-02 | 308.71 |
| 27 | 2451245 | 1999-03-07 | 309.64 |
| 28 | 2451568 | 2000-01-24 | 309.14 |
| 29 | 2451868 | 2000-11-19 | 307.93 |
| 30 | 2452182 | 2001-09-29 | 307.44 |
| 31 | 2452489 | 2002-08-02 | 305.79 |
| 32 | 2452788 | 2003-05-28 | 305.57 |
| 33 | 2453089 | 2004-03-24 | 306.07 |
| 34 | 2453396 | 2005-01-25 | 305.64 |
| 35 | 2453698 | 2005-11-23 | 306.42 |
| 36 | 2454016 | 2006-10-07 | 307.07 |
| 37 | 2454319 | 2007-08-06 | 307.71 |
| 38 | 2454631 | 2008-06-13 | 307.72 |
| 39 | 2454936 | 2009-04-14 | 306.22 |
| 40 | 2455240 | 2010-02-12 | 305.94 |
| 41 | 2455553 | 2010-12-22 | 306.79 |
| 42 | 2455849 | 2011-10-14 | 306.71 |
| 43 | 2456152 | 2012-08-12 | 306.35 |
| 44 | 2456466 | 2013-06-22 | 306 |
| 45 | 2456779 | 2014-05-01 | 306.85 |
| 46 | 2457082 | 2015-02-28 | 307.14 |
| 47 | 2457383 | 2015-12-26 | 307.28 |
| 48 | 2457694 | 2016-11-01 | 307.79 |
| 49 | 2458004 | 2017-09-07 | 307.01 |
| 50 | 2458297 | 2018-06-27 | 306.87 |
| 51 | 2458623 | 2019-05-19 | 306.72 |
| 52 | 2458931 | 2020-03-22 | 306.2 |
| 53 | 2459228 | 2021-01-13 | 308.61 |
| 54 | 2459533 | 2021-11-14 | 307.51 |
| 55 | 2459838 | 2022-09-15 | 303.81 |
| 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. |