| E | O (JD) | O (dat) | Period |
| -83 | 2415600 | 1901-08-03 | 234.64 |
| -80 | 2416289 | 1903-06-23 | 235.11 |
| -78 | 2416750 | 1904-09-26 | 235.21 |
| -71 | 2418410 | 1909-04-13 | 235.1 |
| -69 | 2418880 | 1910-07-27 | 234.7 |
| -63 | 2420280 | 1914-05-27 | 234.55 |
| -61 | 2420770 | 1915-09-29 | 234.69 |
| -60 | 2421000 | 1916-05-16 | 234.88 |
| -58 | 2421460 | 1917-08-19 | 234.42 |
| -57 | 2421670 | 1918-03-17 | 234.64 |
| -52 | 2422855 | 1921-06-14 | 234.78 |
| -49 | 2423565 | 1923-05-25 | 234.69 |
| -47 | 2424055 | 1924-09-26 | 234.89 |
| -41 | 2425440 | 1928-07-12 | 235.14 |
| -38 | 2426160 | 1930-07-02 | 235.09 |
| -33 | 2427330 | 1933-09-14 | 234.72 |
| -32 | 2427560 | 1934-05-02 | 234.53 |
| -30 | 2428030 | 1935-08-15 | 234.14 |
| -27 | 2428740 | 1937-07-25 | 234.27 |
| -25 | 2429192 | 1938-10-20 | 233.76 |
| -24 | 2429435 | 1939-06-20 | 233.75 |
| -22 | 2429910 | 1940-10-07 | 233.71 |
| -21 | 2430130 | 1941-05-15 | 233.72 |
| -19 | 2430600 | 1942-08-28 | 233.82 |
| -16 | 2431302 | 1944-07-30 | 233.71 |
| -13 | 2432005 | 1946-07-03 | 233.53 |
| -11 | 2432470 | 1947-10-11 | 233.87 |
| -10 | 2432710 | 1948-06-07 | 233.99 |
| -5 | 2433880 | 1951-08-21 | 233.88 |
| 0 | 2435035 | 1954-10-19 | 233.88 |
| 3 | 2435740 | 1956-09-23 | 233.78 |
| 20 | 2439730 | 1967-08-27 | 233.7 |
| 23 | 2440427 | 1969-07-24 | 233.56 |
| 31 | 2442289 | 1974-08-29 | 233.47 |
| 34 | 2442997 | 1976-08-06 | 233.39 |
| 36 | 2443450 | 1977-11-02 | 233.24 |
| 37 | 2443680 | 1978-06-20 | 232.88 |
| 39 | 2444140 | 1979-09-23 | 232.91 |
| 42 | 2444840 | 1981-08-23 | 232.82 |
| 43 | 2445070 | 1982-04-10 | 232.57 |
| 45 | 2445560 | 1983-08-13 | 232.68 |
| 46 | 2445800 | 1984-04-09 | 232.88 |
| 47 | 2446010 | 1984-11-05 | 232.72 |
| 48 | 2446237 | 1985-06-20 | 232.62 |
| 50 | 2446699 | 1986-09-25 | 233.28 |
| 51 | 2446930 | 1987-05-14 | 234.47 |
| 53 | 2447410 | 1988-09-05 | 235.91 |
| 54 | 2447635 | 1989-04-18 | 237.36 |
| 56 | 2448110 | 1990-08-06 | 238.06 |
| 59 | 2448827 | 1992-07-23 | 238.68 |
| 62 | 2449553 | 1994-07-19 | 239.08 |
| 64 | 2450031 | 1995-11-09 | 239.43 |
| 65 | 2450276 | 1996-07-11 | 240.18 |
| 67 | 2450746 | 1997-10-24 | 240.31 |
| 68 | 2450988 | 1998-06-23 | 239.74 |
| 70 | 2451469 | 1999-10-17 | 238.96 |
| 71 | 2451712 | 2000-06-16 | 238.3 |
| 73 | 2452204 | 2001-10-21 | 237.21 |
| 74 | 2452431 | 2002-06-05 | 235.97 |
| 75 | 2452650 | 2003-01-10 | 235.31 |
| 76 | 2452889 | 2003-09-06 | 233.93 |
| 77 | 2453123 | 2004-04-27 | 233.36 |
| 79 | 2453587 | 2005-08-04 | 232.56 |
| 81 | 2454050 | 2006-11-10 | 232.5 |
| 82 | 2454302 | 2007-07-20 | 233.01 |
| 83 | 2454515 | 2008-02-18 | 232.75 |
| 84 | 2454760 | 2008-10-20 | 233.14 |
| 85 | 2454981 | 2009-05-29 | 233.44 |
| 86 | 2455205 | 2010-01-08 | 233.5 |
| 87 | 2455457 | 2010-09-17 | 233.23 |
| 88 | 2455684 | 2011-05-02 | 234.61 |
| 89 | 2455929 | 2012-01-02 | 235.28 |
| 90 | 2456158 | 2012-08-18 | 235.68 |
| 91 | 2456389 | 2013-04-06 | 235.74 |
| 92 | 2456620 | 2013-11-23 | 234.93 |
| 93 | 2456868 | 2014-07-29 | 234.95 |
| 94 | 2457110 | 2015-03-28 | 234.34 |
| 95 | 2457329 | 2015-11-02 | 235.08 |
| 96 | 2457570 | 2016-06-30 | 235.21 |
| 97 | 2457800 | 2017-02-15 | 234.51 |
| 98 | 2458035 | 2017-10-08 | 233.84 |
| 99 | 2458264 | 2018-05-25 | 233.27 |
| 100 | 2458516 | 2019-02-01 | 233.18 |
| 101 | 2458745 | 2019-09-18 | 232.31 |
| 102 | 2458967 | 2020-04-27 | 232.1 |
| 103 | 2459206 | 2020-12-22 | 231.55 |
| 104 | 2459428 | 2021-08-01 | 230.83 |
| 105 | 2459660 | 2022-03-21 | 229.04 |
| 106 | 2459890 | 2022-11-06 | 229.31 |
| 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. |