| E | O (JD) | O (dat) | Period |
| -36 | 2425101 | 1927-08-08 | 215.85 |
| -35 | 2425309 | 1928-03-03 | 216.93 |
| -34 | 2425540 | 1928-10-20 | 217.85 |
| -32 | 2425956 | 1929-12-10 | 217.33 |
| -31 | 2426178 | 1930-07-20 | 218 |
| -30 | 2426402 | 1931-03-01 | 218.11 |
| -29 | 2426618 | 1931-10-03 | 218.24 |
| -27 | 2427056 | 1932-12-14 | 217.28 |
| -26 | 2427278 | 1933-07-24 | 217.23 |
| -25 | 2427497 | 1934-02-28 | 217.62 |
| -24 | 2427709 | 1934-09-28 | 216.81 |
| -10 | 2430726 | 1943-01-01 | 216.39 |
| 1 | 2433150 | 1949-08-21 | 216.41 |
| 13 | 2435756 | 1956-10-09 | 216.42 |
| 48 | 2443285 | 1977-05-21 | 216.51 |
| 49 | 2443507 | 1977-12-29 | 216.25 |
| 50 | 2443730 | 1978-08-09 | 215.7 |
| 52 | 2444156 | 1979-10-09 | 215.78 |
| 54 | 2444590 | 1980-12-16 | 215.96 |
| 56 | 2445020 | 1982-02-19 | 215.33 |
| 57 | 2445240 | 1982-09-27 | 215.54 |
| 59 | 2445669 | 1983-11-30 | 215.57 |
| 61 | 2446090 | 1985-01-24 | 215 |
| 62 | 2446315 | 1985-09-06 | 213.65 |
| 64 | 2446744 | 1986-11-09 | 213.63 |
| 65 | 2446960 | 1987-06-13 | 215.12 |
| 66 | 2447165 | 1988-01-04 | 214.53 |
| 67 | 2447368 | 1988-07-25 | 213.65 |
| 68 | 2447600 | 1989-03-14 | 214.13 |
| 69 | 2447816 | 1989-10-16 | 214.12 |
| 71 | 2448236 | 1990-12-10 | 214.71 |
| 72 | 2448455 | 1991-07-17 | 214.39 |
| 73 | 2448675 | 1992-02-22 | 213.28 |
| 74 | 2448876 | 1992-09-10 | 213.47 |
| 76 | 2449307 | 1993-11-15 | 213.12 |
| 77 | 2449520 | 1994-06-16 | 212.44 |
| 78 | 2449735 | 1995-01-17 | 213.31 |
| 79 | 2449946 | 1995-08-16 | 214.13 |
| 80 | 2450155 | 1996-03-12 | 213.79 |
| 81 | 2450374 | 1996-10-17 | 213.29 |
| 82 | 2450590 | 1997-05-21 | 213.21 |
| 83 | 2450805 | 1997-12-22 | 213.8 |
| 84 | 2451015 | 1998-07-20 | 213.69 |
| 85 | 2451226 | 1999-02-16 | 213.5 |
| 86 | 2451440 | 1999-09-18 | 213.56 |
| 88 | 2451868 | 2000-11-19 | 213.87 |
| 89 | 2452080 | 2001-06-19 | 214.62 |
| 90 | 2452300 | 2002-01-25 | 214.62 |
| 91 | 2452512 | 2002-08-25 | 214.4 |
| 92 | 2452730 | 2003-03-31 | 214.71 |
| 93 | 2452945 | 2003-11-01 | 214.64 |
| 94 | 2453155 | 2004-05-29 | 214.07 |
| 95 | 2453369 | 2004-12-29 | 213.73 |
| 96 | 2453585 | 2005-08-02 | 213.69 |
| 97 | 2453800 | 2006-03-05 | 214.69 |
| 98 | 2454009 | 2006-09-30 | 215.69 |
| 100 | 2454439 | 2007-12-04 | 215.37 |
| 101 | 2454655 | 2008-07-07 | 215.13 |
| 102 | 2454880 | 2009-02-17 | 216.44 |
| 103 | 2455095 | 2009-09-20 | 216.87 |
| 104 | 2455305 | 2010-04-18 | 216.57 |
| 105 | 2455522 | 2010-11-21 | 216.43 |
| 106 | 2455750 | 2011-07-07 | 215.5 |
| 107 | 2455951 | 2012-01-24 | 216.57 |
| 108 | 2456175 | 2012-09-04 | 217.71 |
| 109 | 2456390 | 2013-04-07 | 217 |
| 110 | 2456602 | 2013-11-05 | 217.71 |
| 111 | 2456830 | 2014-06-21 | 218.71 |
| 112 | 2457045 | 2015-01-22 | 218.86 |
| 113 | 2457265 | 2015-08-30 | 219.21 |
| 114 | 2457484 | 2016-04-05 | 217.71 |
| 115 | 2457704 | 2016-11-11 | 217.43 |
| 116 | 2457925 | 2017-06-20 | 218 |
| 117 | 2458136 | 2018-01-17 | 217.36 |
| 118 | 2458344 | 2018-08-13 | 216.93 |
| 119 | 2458575 | 2019-04-01 | 215.57 |
| 120 | 2458787 | 2019-10-30 | 215.79 |
| 121 | 2459005 | 2020-06-04 | 217.86 |
| 122 | 2459220 | 2021-01-05 | 217.54 |
| 123 | 2459427 | 2021-07-31 | 215.83 |
| 124 | 2459655 | 2022-03-16 | 216.08 |
| 125 | 2459875 | 2022-10-22 | 215.7 |
| 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. |