| E | O (JD) | O (dat) | Period |
| -145 | 2419308 | 1911-09-28 | 241.36 |
| -143 | 2419784 | 1913-01-16 | 238.17 |
| -142 | 2420013 | 1913-09-02 | 234.19 |
| -140 | 2420488 | 1914-12-21 | 234.32 |
| -139 | 2420743 | 1915-09-02 | 234.96 |
| -137 | 2421197 | 1916-11-29 | 234.44 |
| -135 | 2421654 | 1918-03-01 | 235.12 |
| -134 | 2421893 | 1918-10-26 | 234.24 |
| -131 | 2422603 | 1920-10-05 | 234.24 |
| -129 | 2423055 | 1921-12-31 | 236.96 |
| -128 | 2423324 | 1922-09-26 | 237.63 |
| -126 | 2423763 | 1923-12-09 | 237.99 |
| -125 | 2424033 | 1924-09-04 | 238.42 |
| -123 | 2424505 | 1925-12-20 | 238.57 |
| -122 | 2424745 | 1926-08-17 | 238.75 |
| -76 | 2435696 | 1956-08-10 | 238.98 |
| -74 | 2436188 | 1957-12-15 | 238.76 |
| -73 | 2436434 | 1958-08-18 | 238.87 |
| -71 | 2436915 | 1959-12-12 | 239.98 |
| -70 | 2437169 | 1960-08-22 | 244.43 |
| -68 | 2437633 | 1961-11-29 | 244.24 |
| -67 | 2437893 | 1962-08-16 | 244.81 |
| -65 | 2438387 | 1963-12-23 | 244.64 |
| -64 | 2438630 | 1964-08-22 | 244.92 |
| -62 | 2439121 | 1965-12-26 | 244.52 |
| -61 | 2439369 | 1966-08-31 | 242.7 |
| -58 | 2440097 | 1968-08-28 | 242.74 |
| -55 | 2440828 | 1970-08-29 | 243.26 |
| -53 | 2441300 | 1971-12-14 | 242.81 |
| -52 | 2441533 | 1972-08-03 | 242.35 |
| -50 | 2442038 | 1973-12-21 | 241.43 |
| -49 | 2442281 | 1974-08-21 | 241 |
| -47 | 2442765 | 1975-12-18 | 242.54 |
| -46 | 2443002 | 1976-08-11 | 241.75 |
| -44 | 2443476 | 1977-11-28 | 239.31 |
| -41 | 2444195 | 1979-11-17 | 238.36 |
| -40 | 2444459 | 1980-08-07 | 238.25 |
| -38 | 2444914 | 1981-11-05 | 239.32 |
| -35 | 2445627 | 1983-10-19 | 239.73 |
| -33 | 2446093 | 1985-01-27 | 238.8 |
| -32 | 2446345 | 1985-10-06 | 238.88 |
| -30 | 2446834 | 1987-02-07 | 240.22 |
| -29 | 2447070 | 1987-10-01 | 241.48 |
| -27 | 2447554 | 1989-01-27 | 241.71 |
| -26 | 2447791 | 1989-09-21 | 241.14 |
| -24 | 2448275 | 1991-01-18 | 240.76 |
| -23 | 2448516 | 1991-09-16 | 239.95 |
| -21 | 2448998 | 1993-01-10 | 239.76 |
| -20 | 2449245 | 1993-09-14 | 240.33 |
| -18 | 2449715 | 1994-12-28 | 239.65 |
| -17 | 2449948 | 1995-08-18 | 240.37 |
| -15 | 2450432 | 1996-12-14 | 242.17 |
| -14 | 2450681 | 1997-08-20 | 242.17 |
| -13 | 2450903 | 1998-03-30 | 243.11 |
| -12 | 2451178 | 1998-12-30 | 242.61 |
| -11 | 2451424 | 1999-09-02 | 241.67 |
| -9 | 2451895 | 2000-12-16 | 243.11 |
| -8 | 2452144 | 2001-08-22 | 241.06 |
| -6 | 2452603 | 2002-11-24 | 237.78 |
| -5 | 2452860 | 2003-08-08 | 236.24 |
| -4 | 2453100 | 2004-04-04 | 235.12 |
| -3 | 2453320 | 2004-11-10 | 236.12 |
| -2 | 2453562 | 2005-07-10 | 236 |
| -1 | 2453773 | 2006-02-06 | 235.12 |
| 0 | 2454028 | 2006-10-19 | 236.17 |
| 2 | 2454497 | 2008-01-31 | 237.05 |
| 3 | 2454742 | 2008-10-02 | 238.4 |
| 5 | 2455215 | 2010-01-18 | 238.95 |
| 6 | 2455456 | 2010-09-16 | 238.76 |
| 8 | 2455930 | 2012-01-03 | 238.62 |
| 9 | 2456173 | 2012-09-02 | 237.86 |
| 11 | 2456646 | 2013-12-19 | 238.43 |
| 12 | 2456893 | 2014-08-23 | 239.57 |
| 14 | 2457357 | 2015-11-30 | 239.57 |
| 15 | 2457595 | 2016-07-25 | 239.38 |
| 17 | 2458083 | 2017-11-25 | 239.9 |
| 18 | 2458334 | 2018-08-03 | 240.95 |
| 20 | 2458800 | 2019-11-12 | 242.72 |
| 21 | 2459046 | 2020-07-15 | 242.85 |
| 22 | 2459291 | 2021-03-17 | 240.69 |
| 23 | 2459537 | 2021-11-18 | 242.14 |
| 24 | 2459784 | 2022-07-23 | 245.8 |
| 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. |