| E | O (JD) | O (dat) | Period |
| -80 | 2416289 | 1903-06-23 | 234.99 |
| -41 | 2425440 | 1928-07-12 | 235.06 |
| -38 | 2426150 | 1930-06-22 | 234.66 |
| -33 | 2427330 | 1933-09-14 | 234.66 |
| -30 | 2428032 | 1935-08-17 | 234.95 |
| -27 | 2428740 | 1937-07-25 | 234.61 |
| -25 | 2429192 | 1938-10-20 | 234.06 |
| -24 | 2429440 | 1939-06-25 | 234 |
| -22 | 2429910 | 1940-10-07 | 233.4 |
| -21 | 2430126 | 1941-05-11 | 233.81 |
| -19 | 2430610 | 1942-09-07 | 234.06 |
| -16 | 2431304 | 1944-08-01 | 233.41 |
| -11 | 2432470 | 1947-10-11 | 233.78 |
| -10 | 2432710 | 1948-06-07 | 234.03 |
| -5 | 2433880 | 1951-08-21 | 234.05 |
| 0 | 2435040 | 1954-10-24 | 234.01 |
| 3 | 2435750 | 1956-10-03 | 233.79 |
| 20 | 2439730 | 1967-08-27 | 233.8 |
| 23 | 2440440 | 1969-08-06 | 233.83 |
| 31 | 2442289 | 1974-08-29 | 233.59 |
| 34 | 2442997 | 1976-08-06 | 233.06 |
| 37 | 2443700 | 1978-07-10 | 232.67 |
| 39 | 2444160 | 1979-10-13 | 233.27 |
| 42 | 2444850 | 1981-09-02 | 233 |
| 43 | 2445080 | 1982-04-20 | 231.25 |
| 45 | 2445560 | 1983-08-13 | 230.77 |
| 46 | 2445800 | 1984-04-09 | 231.82 |
| 47 | 2446010 | 1984-11-05 | 232.92 |
| 48 | 2446237 | 1985-06-20 | 233.22 |
| 50 | 2446700 | 1986-09-26 | 234 |
| 53 | 2447410 | 1988-09-05 | 235.58 |
| 56 | 2448110 | 1990-08-06 | 237.06 |
| 59 | 2448827 | 1992-07-23 | 237.79 |
| 62 | 2449553 | 1994-07-19 | 238.25 |
| 64 | 2450031 | 1995-11-09 | 239.21 |
| 65 | 2450276 | 1996-07-11 | 240.15 |
| 67 | 2450746 | 1997-10-24 | 240.7 |
| 68 | 2450988 | 1998-06-23 | 240.52 |
| 70 | 2451469 | 1999-10-17 | 238.7 |
| 71 | 2451712 | 2000-06-16 | 237.74 |
| 73 | 2452204 | 2001-10-21 | 237.67 |
| 74 | 2452431 | 2002-06-05 | 236.28 |
| 75 | 2452650 | 2003-01-10 | 234.53 |
| 76 | 2452889 | 2003-09-06 | 233.47 |
| 77 | 2453123 | 2004-04-27 | 232.33 |
| 79 | 2453587 | 2005-08-04 | 233 |
| 81 | 2454050 | 2006-11-10 | 233.44 |
| 82 | 2454302 | 2007-07-20 | 231.89 |
| 83 | 2454515 | 2008-02-18 | 232.47 |
| 84 | 2454760 | 2008-10-20 | 233.6 |
| 85 | 2454981 | 2009-05-29 | 232.93 |
| 86 | 2455205 | 2010-01-08 | 233.57 |
| 87 | 2455457 | 2010-09-17 | 233.71 |
| 88 | 2455684 | 2011-05-02 | 233.43 |
| 89 | 2455929 | 2012-01-02 | 235.86 |
| 90 | 2456158 | 2012-08-18 | 236.86 |
| 91 | 2456389 | 2013-04-06 | 235.57 |
| 92 | 2456620 | 2013-11-23 | 234.71 |
| 93 | 2456868 | 2014-07-29 | 234.5 |
| 94 | 2457110 | 2015-03-28 | 234.86 |
| 95 | 2457329 | 2015-11-02 | 235 |
| 96 | 2457570 | 2016-06-30 | 235.14 |
| 97 | 2457800 | 2017-02-15 | 234.5 |
| 98 | 2458035 | 2017-10-08 | 233.79 |
| 99 | 2458264 | 2018-05-25 | 233.86 |
| 100 | 2458516 | 2019-02-01 | 233.14 |
| 101 | 2458745 | 2019-09-18 | 232.36 |
| 102 | 2458967 | 2020-04-27 | 232.21 |
| 103 | 2459206 | 2020-12-22 | 231.05 |
| 104 | 2459428 | 2021-08-01 | 228.49 |
| 105 | 2459660 | 2022-03-21 | 230 |
| 106 | 2459890 | 2022-11-06 | 231.6 |
| 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. |