| E | O (JD) | O (dat) | Period |
| -32 | 2417000 | 1905-06-03 | 321.98 |
| -26 | 2418940 | 1910-09-25 | 322.08 |
| -25 | 2419250 | 1911-08-01 | 321.98 |
| -14 | 2422810 | 1921-04-30 | 322.15 |
| -9 | 2424410 | 1925-09-16 | 322.13 |
| -8 | 2424720 | 1926-07-23 | 322.18 |
| -6 | 2425380 | 1928-05-13 | 321.9 |
| -1 | 2426980 | 1932-09-29 | 321.68 |
| 0 | 2427320 | 1933-09-04 | 320.67 |
| 1 | 2427630 | 1934-07-11 | 320.14 |
| 2 | 2427960 | 1935-06-06 | 320.1 |
| 7 | 2429544 | 1939-10-07 | 319.94 |
| 8 | 2429860 | 1940-08-18 | 320.02 |
| 9 | 2430170 | 1941-06-24 | 320.53 |
| 15 | 2432090 | 1946-09-26 | 322.73 |
| 16 | 2432430 | 1947-09-01 | 323.29 |
| 17 | 2432762 | 1948-07-29 | 323.81 |
| 18 | 2433080 | 1949-06-12 | 323.93 |
| 19 | 2433427 | 1950-05-25 | 323.95 |
| 35 | 2438610 | 1964-08-02 | 324.02 |
| 37 | 2439240 | 1966-04-24 | 323.74 |
| 41 | 2440530 | 1969-11-04 | 323.66 |
| 42 | 2440855 | 1970-09-25 | 323.56 |
| 43 | 2441170 | 1971-08-06 | 323.17 |
| 44 | 2441510 | 1972-07-11 | 323.55 |
| 46 | 2442150 | 1974-04-12 | 324.19 |
| 49 | 2443130 | 1976-12-17 | 324.58 |
| 51 | 2443770 | 1978-09-18 | 324.38 |
| 52 | 2444092 | 1979-08-06 | 324.27 |
| 53 | 2444430 | 1980-07-09 | 323.95 |
| 55 | 2445070 | 1982-04-10 | 324.11 |
| 58 | 2446050 | 1984-12-15 | 323.89 |
| 59 | 2446362 | 1985-10-23 | 324.27 |
| 60 | 2446687 | 1986-09-13 | 324.19 |
| 61 | 2447014 | 1987-08-06 | 324.08 |
| 62 | 2447339 | 1988-06-26 | 324.44 |
| 63 | 2447660 | 1989-05-13 | 324.57 |
| 67 | 2448965 | 1992-12-08 | 324.87 |
| 68 | 2449285 | 1993-10-24 | 324.72 |
| 69 | 2449612 | 1994-09-16 | 324.49 |
| 70 | 2449936 | 1995-08-06 | 324.74 |
| 71 | 2450262 | 1996-06-27 | 324.85 |
| 72 | 2450585 | 1997-05-16 | 324.77 |
| 75 | 2451557 | 2000-01-13 | 325.31 |
| 76 | 2451878 | 2000-11-29 | 325.42 |
| 77 | 2452216 | 2001-11-02 | 325.72 |
| 78 | 2452536 | 2002-09-18 | 325.97 |
| 79 | 2452860 | 2003-08-08 | 326.12 |
| 80 | 2453197 | 2004-07-10 | 326.07 |
| 81 | 2453516 | 2005-05-25 | 325.54 |
| 82 | 2453845 | 2006-04-19 | 324.16 |
| 83 | 2454170 | 2007-03-10 | 323.09 |
| 86 | 2455144 | 2009-11-08 | 322.06 |
| 87 | 2455467 | 2010-09-27 | 320.62 |
| 88 | 2455786 | 2011-08-12 | 320.07 |
| 89 | 2456090 | 2012-06-11 | 319.15 |
| 92 | 2457055 | 2015-02-01 | 318.4 |
| 93 | 2457373 | 2015-12-16 | 317.41 |
| 94 | 2457676 | 2016-10-14 | 317.71 |
| 95 | 2458008 | 2017-09-11 | 318.05 |
| 96 | 2458320 | 2018-07-20 | 318.19 |
| 97 | 2458640 | 2019-06-05 | 317.78 |
| 98 | 2458953 | 2020-04-13 | 318.08 |
| 99 | 2459285 | 2021-03-11 | 318.67 |
| 100 | 2459598 | 2022-01-18 | 317.68 |
| 101 | 2459906 | 2022-11-22 | 318.17 |
| 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. |