| E | O (JD) | O (dat) | Period |
| -56 | 2414610 | 1898-11-16 | 485 |
| -55 | 2415128 | 1900-04-18 | 495.5 |
| -54 | 2415615 | 1901-08-18 | 507.15 |
| -53 | 2416125 | 1903-01-10 | 503.81 |
| -52 | 2416582 | 1904-04-11 | 498.79 |
| -51 | 2417130 | 1905-10-11 | 496.94 |
| -50 | 2417644 | 1907-03-09 | 496.65 |
| -49 | 2418121 | 1908-06-28 | 498.8 |
| -48 | 2418600 | 1909-10-20 | 495.67 |
| -47 | 2419100 | 1911-03-04 | 489.25 |
| -46 | 2419593 | 1912-07-09 | 488.43 |
| -45 | 2420097 | 1913-11-25 | 488.68 |
| -43 | 2421050 | 1916-07-05 | 490.06 |
| -42 | 2421552 | 1917-11-19 | 490.87 |
| -41 | 2422028 | 1919-03-10 | 489.12 |
| -40 | 2422512 | 1920-07-06 | 489.87 |
| -39 | 2423029 | 1921-12-05 | 490.72 |
| -38 | 2423518 | 1923-04-08 | 491.86 |
| -37 | 2423998 | 1924-07-31 | 494.42 |
| -36 | 2424497 | 1925-12-12 | 493.57 |
| -35 | 2424975 | 1927-04-04 | 493.21 |
| -34 | 2425491 | 1928-09-01 | 494.5 |
| -33 | 2425971 | 1929-12-25 | 495.71 |
| -32 | 2426480 | 1931-05-18 | 497.5 |
| -31 | 2426972 | 1932-09-21 | 498 |
| -30 | 2427467 | 1934-01-29 | 498.87 |
| -29 | 2427968 | 1935-06-14 | 500.07 |
| -28 | 2428469 | 1936-10-27 | 501.21 |
| -27 | 2428969 | 1938-03-11 | 502.64 |
| -26 | 2429477 | 1939-08-01 | 502.92 |
| -25 | 2429975 | 1940-12-11 | 503.78 |
| -24 | 2430494 | 1942-05-14 | 502.85 |
| -23 | 2430982 | 1943-09-14 | 501.35 |
| -22 | 2431494 | 1945-02-07 | 500.93 |
| -21 | 2431996 | 1946-06-24 | 499.37 |
| -20 | 2432482 | 1947-10-23 | 498.3 |
| -19 | 2432983 | 1949-03-07 | 498.65 |
| -18 | 2433482 | 1950-07-19 | 497.71 |
| -17 | 2433978 | 1951-11-27 | 497.85 |
| -16 | 2434474 | 1953-04-06 | 498.14 |
| -15 | 2434983 | 1954-08-28 | 497.85 |
| -14 | 2435475 | 1956-01-02 | 497.21 |
| -13 | 2435973 | 1957-05-14 | 496.78 |
| -12 | 2436466 | 1958-09-19 | 497.36 |
| -11 | 2436969 | 1960-02-04 | 494.87 |
| -10 | 2437452 | 1961-06-01 | 493.65 |
| -9 | 2437955 | 1962-10-17 | 495.5 |
| -8 | 2438465 | 1964-03-10 | 495.42 |
| -7 | 2438921 | 1965-06-09 | 494.71 |
| -6 | 2439438 | 1966-11-08 | 494.92 |
| -5 | 2439938 | 1968-03-22 | 493.5 |
| -4 | 2440433 | 1969-07-30 | 493.07 |
| -3 | 2440914 | 1970-11-23 | 493.42 |
| -2 | 2441422 | 1972-04-14 | 491.15 |
| -1 | 2441907 | 1973-08-12 | 489.37 |
| 0 | 2442382 | 1974-11-30 | 489.37 |
| 1 | 2442885 | 1976-04-16 | 489.58 |
| 2 | 2443367 | 1977-08-11 | 491.36 |
| 3 | 2443855 | 1978-12-12 | 493.85 |
| 4 | 2444343 | 1980-04-13 | 494.71 |
| 5 | 2444847 | 1981-08-30 | 498.07 |
| 6 | 2445361 | 1983-01-26 | 501.42 |
| 7 | 2445842 | 1984-05-21 | 504.28 |
| 8 | 2446351 | 1985-10-12 | 506.35 |
| 9 | 2446874 | 1987-03-19 | 505.43 |
| 10 | 2447368 | 1988-07-25 | 506.51 |
| 11 | 2447890 | 1989-12-29 | 507.65 |
| 12 | 2448389 | 1991-05-12 | 506.36 |
| 13 | 2448895 | 1992-09-29 | 506.14 |
| 14 | 2449399 | 1994-02-15 | 504.92 |
| 15 | 2449901 | 1995-07-02 | 502.64 |
| 16 | 2450413 | 1996-11-25 | 501.35 |
| 17 | 2450915 | 1998-04-11 | 499.71 |
| 18 | 2451412 | 1999-08-21 | 498.35 |
| 19 | 2451904 | 2000-12-25 | 496.15 |
| 20 | 2452399 | 2002-05-04 | 493.44 |
| 21 | 2452891 | 2003-09-08 | 491.65 |
| 22 | 2453386 | 2005-01-15 | 490.79 |
| 23 | 2453874 | 2006-05-18 | 491.21 |
| 24 | 2454362 | 2007-09-18 | 491.64 |
| 25 | 2454848 | 2009-01-16 | 491.07 |
| 26 | 2455339 | 2010-05-22 | 491.21 |
| 27 | 2455841 | 2011-10-06 | 492.28 |
| 28 | 2456332 | 2013-02-08 | 493 |
| 29 | 2456820 | 2014-06-11 | 493.65 |
| 30 | 2457317 | 2015-10-21 | 493.01 |
| 31 | 2457811 | 2017-02-26 | 492.72 |
| 32 | 2458301 | 2018-07-01 | 493.67 |
| 33 | 2458797 | 2019-11-09 | 493.58 |
| 34 | 2459285 | 2021-03-11 | 492.75 |
| 35 | 2459786 | 2022-07-25 | 492.5 |
| 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. |