| E | O (JD) | O (dat) | Period |
| -87 | 2415970 | 1902-08-08 | 428.31 |
| -86 | 2416400 | 1903-10-12 | 428.25 |
| -85 | 2416832 | 1904-12-17 | 429.79 |
| -84 | 2417247 | 1906-02-05 | 429.65 |
| -83 | 2417702 | 1907-05-06 | 429.44 |
| -82 | 2418104 | 1908-06-11 | 429.62 |
| -81 | 2418541 | 1909-08-22 | 428.99 |
| -80 | 2418988 | 1910-11-12 | 428.82 |
| -79 | 2419405 | 1912-01-03 | 428.93 |
| -78 | 2419832 | 1913-03-05 | 429.67 |
| -77 | 2420268 | 1914-05-15 | 430.47 |
| -76 | 2420680 | 1915-07-01 | 431.6 |
| -75 | 2421116 | 1916-09-09 | 431.28 |
| -74 | 2421547 | 1917-11-14 | 431.82 |
| -73 | 2422006 | 1919-02-16 | 431.64 |
| -72 | 2422413 | 1920-03-29 | 431.18 |
| -71 | 2422880 | 1921-07-09 | 431.57 |
| -70 | 2423279 | 1922-08-12 | 431.4 |
| -69 | 2423709 | 1923-10-16 | 430.94 |
| -68 | 2424137 | 1924-12-17 | 430.7 |
| -67 | 2424565 | 1926-02-18 | 431.74 |
| -66 | 2425007 | 1927-05-06 | 431.7 |
| -65 | 2425448 | 1928-07-20 | 433.97 |
| -64 | 2425872 | 1929-09-17 | 434.7 |
| -63 | 2426311 | 1930-11-30 | 434.47 |
| -62 | 2426741 | 1932-02-03 | 433.52 |
| -61 | 2427176 | 1933-04-13 | 431.52 |
| -60 | 2427619 | 1934-06-30 | 430.31 |
| -59 | 2428054 | 1935-09-08 | 429.25 |
| -58 | 2428472 | 1936-10-30 | 428.15 |
| -57 | 2428895 | 1937-12-27 | 426.98 |
| -56 | 2429310 | 1939-02-15 | 426.15 |
| -55 | 2429746 | 1940-04-26 | 425.25 |
| -54 | 2430168 | 1941-06-22 | 425.45 |
| -53 | 2430602 | 1942-08-30 | 426.16 |
| -52 | 2431020 | 1943-10-22 | 427.03 |
| -51 | 2431453 | 1944-12-28 | 427.65 |
| -50 | 2431872 | 1946-02-20 | 427.24 |
| -49 | 2432304 | 1947-04-28 | 427.18 |
| -48 | 2432730 | 1948-06-27 | 427.45 |
| -47 | 2433167 | 1949-09-07 | 428.78 |
| -46 | 2433593 | 1950-11-07 | 429.56 |
| -45 | 2434012 | 1951-12-31 | 430.46 |
| -44 | 2434437 | 1953-02-28 | 430.62 |
| -43 | 2434876 | 1954-05-13 | 430.85 |
| -42 | 2435320 | 1955-07-31 | 430.82 |
| -41 | 2435750 | 1956-10-03 | 430.76 |
| -40 | 2436179 | 1957-12-06 | 431.09 |
| -39 | 2436605 | 1959-02-05 | 430.78 |
| -38 | 2437035 | 1960-04-10 | 430.43 |
| -37 | 2437464 | 1961-06-13 | 430.72 |
| -36 | 2437886 | 1962-08-09 | 431.11 |
| -35 | 2438327 | 1963-10-24 | 430.86 |
| -34 | 2438757 | 1964-12-27 | 431.55 |
| -33 | 2439195 | 1966-03-10 | 431.62 |
| -32 | 2439634 | 1967-05-23 | 431.86 |
| -31 | 2440055 | 1968-07-17 | 431.49 |
| -30 | 2440472 | 1969-09-07 | 431.65 |
| -29 | 2440922 | 1970-12-01 | 431.31 |
| -28 | 2441346 | 1972-01-29 | 431.85 |
| -27 | 2441782 | 1973-04-09 | 432.25 |
| -26 | 2442203 | 1974-06-04 | 432.94 |
| -25 | 2442656 | 1975-08-31 | 433.35 |
| -24 | 2443070 | 1976-10-18 | 432.84 |
| -23 | 2443522 | 1978-01-13 | 432.58 |
| -22 | 2443946 | 1979-03-13 | 432.35 |
| -21 | 2444376 | 1980-05-16 | 431.82 |
| -20 | 2444813 | 1981-07-27 | 430.58 |
| -19 | 2445244 | 1982-10-01 | 430.55 |
| -18 | 2445664 | 1983-11-25 | 429.04 |
| -17 | 2446104 | 1985-02-07 | 428.42 |
| -16 | 2446526 | 1986-04-05 | 427.92 |
| -15 | 2446954 | 1987-06-07 | 427.26 |
| -14 | 2447387 | 1988-08-13 | 427.03 |
| -13 | 2447804 | 1989-10-04 | 427.29 |
| -12 | 2448228 | 1990-12-02 | 427.79 |
| -11 | 2448663 | 1992-02-10 | 428.92 |
| -10 | 2449087 | 1993-04-09 | 429.23 |
| -9 | 2449514 | 1994-06-10 | 428.8 |
| -8 | 2449948 | 1995-08-18 | 428.5 |
| -7 | 2450390 | 1996-11-02 | 427.5 |
| -6 | 2450821 | 1998-01-07 | 426.45 |
| -5 | 2451240 | 1999-03-02 | 426.01 |
| -4 | 2451653 | 2000-04-18 | 425.87 |
| -3 | 2452076 | 2001-06-15 | 425.64 |
| -2 | 2452498 | 2002-08-11 | 425.55 |
| -1 | 2452927 | 2003-10-14 | 426.63 |
| 0 | 2453358 | 2004-12-18 | 428.12 |
| 1 | 2453795 | 2006-02-28 | 428.87 |
| 2 | 2454222 | 2007-05-01 | 429.52 |
| 3 | 2454646 | 2008-06-28 | 430.67 |
| 4 | 2455081 | 2009-09-06 | 431.65 |
| 5 | 2455511 | 2010-11-10 | 432.25 |
| 6 | 2455930 | 2012-01-03 | 433.38 |
| 7 | 2456370 | 2013-03-18 | 434.44 |
| 8 | 2456817 | 2014-06-08 | 435.22 |
| 9 | 2457255 | 2015-08-20 | 434.82 |
| 10 | 2457683 | 2016-10-21 | 434.93 |
| 11 | 2458129 | 2018-01-10 | 435.15 |
| 12 | 2458557 | 2019-03-14 | 434.22 |
| 13 | 2458991 | 2020-05-21 | 433 |
| 14 | 2459410 | 2021-07-14 | 432.39 |
| 15 | 2459852 | 2022-09-29 | 432.06 |
| 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. |