| E | O (JD) | O (dat) | Period |
| -68 | 2409970 | 1886-03-04 | 509.89 |
| -64 | 2412080 | 1891-12-13 | 508.9 |
| -58 | 2415105 | 1900-03-26 | 507.9 |
| -56 | 2416130 | 1903-01-15 | 506.46 |
| -55 | 2416633 | 1904-06-01 | 505.25 |
| -54 | 2417113 | 1905-09-24 | 504.59 |
| -53 | 2417614 | 1907-02-07 | 500.88 |
| -51 | 2418620 | 1909-11-09 | 499.19 |
| -49 | 2419604 | 1912-07-20 | 498.51 |
| -47 | 2420604 | 1915-04-16 | 499.07 |
| -46 | 2421112 | 1916-09-05 | 499.84 |
| -45 | 2421620 | 1918-01-26 | 500.09 |
| -44 | 2422105 | 1919-05-26 | 500.37 |
| -43 | 2422606 | 1920-10-08 | 500.97 |
| -42 | 2423116 | 1922-03-02 | 501.74 |
| -41 | 2423614 | 1923-07-13 | 501.95 |
| -40 | 2424118 | 1924-11-28 | 501.38 |
| -39 | 2424616 | 1926-04-10 | 500.76 |
| -38 | 2425113 | 1927-08-20 | 498.74 |
| -37 | 2425637 | 1929-01-25 | 496.19 |
| -36 | 2426132 | 1930-06-04 | 494.55 |
| -35 | 2426611 | 1931-09-26 | 492.63 |
| -34 | 2427100 | 1933-01-27 | 490.62 |
| -33 | 2427583 | 1934-05-25 | 488.77 |
| -32 | 2428066 | 1935-09-20 | 486.07 |
| -31 | 2428566 | 1937-02-01 | 485.32 |
| -30 | 2429052 | 1938-06-02 | 485.61 |
| -29 | 2429533 | 1939-09-26 | 485.19 |
| -28 | 2430022 | 1941-01-27 | 484.62 |
| -27 | 2430488 | 1942-05-08 | 485.07 |
| -26 | 2430977 | 1943-09-09 | 484.82 |
| -25 | 2431474 | 1945-01-18 | 486.07 |
| -24 | 2431952 | 1946-05-11 | 487 |
| -23 | 2432430 | 1947-09-01 | 487.52 |
| -22 | 2432939 | 1949-01-22 | 488.77 |
| -21 | 2433415 | 1950-05-13 | 489.01 |
| -20 | 2433918 | 1951-09-28 | 488.31 |
| -19 | 2434398 | 1953-01-20 | 488.56 |
| -18 | 2434881 | 1954-05-18 | 487.6 |
| -17 | 2435380 | 1955-09-29 | 485.97 |
| -16 | 2435870 | 1957-01-31 | 485.42 |
| -15 | 2436339 | 1958-05-15 | 484.4 |
| -14 | 2436836 | 1959-09-24 | 483.07 |
| -13 | 2437308 | 1961-01-08 | 481.17 |
| -12 | 2437791 | 1962-05-06 | 479.03 |
| -11 | 2438276 | 1963-09-03 | 477.14 |
| -10 | 2438762 | 1965-01-01 | 475.74 |
| -9 | 2439221 | 1966-04-05 | 472.25 |
| -8 | 2439693 | 1967-07-21 | 471.02 |
| -7 | 2440167 | 1968-11-06 | 469.4 |
| -6 | 2440631 | 1970-02-13 | 468.37 |
| -5 | 2441104 | 1971-06-01 | 467.55 |
| -4 | 2441542 | 1972-08-12 | 466.37 |
| -3 | 2442036 | 1973-12-19 | 465.09 |
| -2 | 2442501 | 1975-03-29 | 464.87 |
| -1 | 2442973 | 1976-07-13 | 464.02 |
| 0 | 2443432 | 1977-10-15 | 462.9 |
| 1 | 2443872 | 1978-12-29 | 462.48 |
| 2 | 2444341 | 1980-04-11 | 461.37 |
| 3 | 2444822 | 1981-08-05 | 461.65 |
| 4 | 2445265 | 1982-10-22 | 461.46 |
| 5 | 2445722 | 1984-01-22 | 462.3 |
| 6 | 2446188 | 1985-05-02 | 463.95 |
| 7 | 2446664 | 1986-08-21 | 463.27 |
| 8 | 2447126 | 1987-11-26 | 463.11 |
| 9 | 2447576 | 1989-02-18 | 464.49 |
| 10 | 2448047 | 1990-06-04 | 463.71 |
| 11 | 2448529 | 1991-09-29 | 462.47 |
| 12 | 2448969 | 1992-12-12 | 461.71 |
| 13 | 2449437 | 1994-03-25 | 459.03 |
| 14 | 2449913 | 1995-07-14 | 458.22 |
| 15 | 2450352 | 1996-09-25 | 456.14 |
| 16 | 2450811 | 1997-12-28 | 454 |
| 17 | 2451280 | 1999-04-11 | 452.72 |
| 18 | 2451685 | 2000-05-20 | 450.17 |
| 19 | 2452176 | 2001-09-23 | 448.72 |
| 20 | 2452618 | 2002-12-09 | 447.94 |
| 21 | 2453060 | 2004-02-24 | 446.4 |
| 22 | 2453503 | 2005-05-12 | 446.23 |
| 23 | 2453942 | 2006-07-25 | 446.55 |
| 24 | 2454399 | 2007-10-25 | 445.35 |
| 25 | 2454835 | 2009-01-03 | 446.25 |
| 26 | 2455276 | 2010-03-20 | 446.78 |
| 27 | 2455740 | 2011-06-27 | 447.29 |
| 28 | 2456174 | 2012-09-03 | 448.54 |
| 29 | 2456633 | 2013-12-06 | 448.9 |
| 30 | 2457080 | 2015-02-26 | 450.03 |
| 31 | 2457522 | 2016-05-13 | 449.55 |
| 32 | 2457972 | 2017-08-06 | 449.22 |
| 33 | 2458439 | 2018-11-16 | 449.83 |
| 34 | 2458880 | 2020-01-31 | 449.35 |
| 35 | 2459336 | 2021-05-01 | 449.68 |
| 36 | 2459765 | 2022-07-04 | 449.94 |
| 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. |