| E | O (JD) | O (dat) | Period |
| -61 | 2415240 | 1900-08-08 | 480.19 |
| -57 | 2417120 | 1905-10-01 | 479.82 |
| -54 | 2418545 | 1909-08-26 | 478.65 |
| -41 | 2424809 | 1926-10-20 | 477.07 |
| -40 | 2425291 | 1928-02-14 | 477.41 |
| -38 | 2426241 | 1930-09-21 | 478.78 |
| -35 | 2427659 | 1934-08-09 | 477.63 |
| -34 | 2428110 | 1935-11-03 | 473.6 |
| -33 | 2428598 | 1937-03-05 | 472.14 |
| -32 | 2429091 | 1938-07-11 | 472.1 |
| -31 | 2429547 | 1939-10-10 | 472.84 |
| -30 | 2430025 | 1941-01-30 | 473.61 |
| -27 | 2431422 | 1944-11-27 | 473.67 |
| -26 | 2431920 | 1946-04-09 | 474 |
| -25 | 2432360 | 1947-06-23 | 475.5 |
| -24 | 2432873 | 1948-11-17 | 476.94 |
| -23 | 2433342 | 1950-03-01 | 478.42 |
| -22 | 2433828 | 1951-06-30 | 480.35 |
| -21 | 2434303 | 1952-10-17 | 480.5 |
| -20 | 2434775 | 1954-02-01 | 478.6 |
| -19 | 2435265 | 1955-06-06 | 479.25 |
| -18 | 2435740 | 1956-09-23 | 478.41 |
| -17 | 2436220 | 1958-01-16 | 479 |
| -15 | 2437174 | 1960-08-27 | 477.46 |
| -14 | 2437664 | 1961-12-30 | 474.18 |
| -12 | 2438600 | 1964-07-23 | 473.55 |
| -11 | 2439100 | 1965-12-05 | 474.1 |
| -8 | 2440489 | 1969-09-24 | 474.2 |
| -7 | 2440948 | 1970-12-27 | 473.53 |
| -6 | 2441430 | 1972-04-22 | 472.61 |
| -5 | 2441920 | 1973-08-25 | 474.56 |
| -4 | 2442402 | 1974-12-20 | 479.79 |
| -3 | 2442859 | 1976-03-21 | 482.07 |
| -2 | 2443348 | 1977-07-23 | 481.64 |
| -1 | 2443834 | 1978-11-21 | 477.72 |
| 0 | 2444320 | 1980-03-21 | 478.93 |
| 1 | 2444807 | 1981-07-21 | 481.86 |
| 2 | 2445286 | 1982-11-12 | 480.57 |
| 3 | 2445724 | 1984-01-24 | 480.57 |
| 4 | 2446242 | 1985-06-25 | 478.07 |
| 5 | 2446711 | 1986-10-07 | 476.29 |
| 6 | 2447199 | 1988-02-07 | 480.36 |
| 7 | 2447683 | 1989-06-05 | 480.5 |
| 8 | 2448137 | 1990-09-02 | 478.21 |
| 9 | 2448624 | 1992-01-02 | 477.43 |
| 10 | 2449111 | 1993-05-03 | 475.57 |
| 11 | 2449582 | 1994-08-17 | 477.29 |
| 12 | 2450066 | 1995-12-14 | 479.42 |
| 13 | 2450528 | 1997-03-20 | 479.78 |
| 14 | 2451012 | 1998-07-17 | 480.93 |
| 15 | 2451490 | 1999-11-07 | 480.86 |
| 16 | 2451983 | 2001-03-14 | 482.07 |
| 17 | 2452469 | 2002-07-13 | 481.85 |
| 18 | 2452957 | 2003-11-13 | 480.21 |
| 19 | 2453423 | 2005-02-21 | 482.5 |
| 20 | 2453920 | 2006-07-03 | 482.57 |
| 21 | 2454366 | 2007-09-22 | 483 |
| 22 | 2454859 | 2009-01-27 | 482.14 |
| 23 | 2455369 | 2010-06-21 | 480.92 |
| 24 | 2455839 | 2011-10-04 | 480.65 |
| 25 | 2456349 | 2013-02-25 | 480.43 |
| 26 | 2456781 | 2014-05-03 | 479 |
| 27 | 2457295 | 2015-09-29 | 474.78 |
| 28 | 2457720 | 2016-11-27 | 472.35 |
| 29 | 2458231 | 2018-04-22 | 474.04 |
| 30 | 2458703 | 2019-08-07 | 472.29 |
| 31 | 2459152 | 2020-10-29 | 475.42 |
| 32 | 2459649 | 2022-03-10 | 485.51 |
| 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. |