| E | O (JD) | O (dat) | Period |
| -76 | 2415495 | 1901-04-20 | 167.79 |
| -61 | 2418020 | 1908-03-19 | 167.71 |
| -57 | 2418695 | 1910-01-23 | 167.44 |
| -50 | 2419860 | 1913-04-02 | 167.66 |
| -44 | 2420870 | 1916-01-07 | 167.62 |
| -43 | 2421035 | 1916-06-20 | 167.3 |
| -39 | 2421700 | 1918-04-16 | 167.35 |
| -37 | 2422040 | 1919-03-22 | 167.8 |
| -35 | 2422370 | 1920-02-15 | 168.07 |
| -33 | 2422710 | 1921-01-20 | 168.11 |
| -28 | 2423543 | 1923-05-03 | 168.06 |
| -11 | 2426416 | 1931-03-15 | 168.16 |
| -9 | 2426750 | 1932-02-12 | 168.74 |
| -7 | 2427080 | 1933-01-07 | 168.95 |
| -5 | 2427416 | 1933-12-09 | 168.62 |
| -4 | 2427588 | 1934-05-30 | 168.55 |
| -3 | 2427785 | 1934-12-13 | 168.66 |
| -2 | 2427929 | 1935-05-06 | 168.75 |
| 0 | 2428269 | 1936-04-10 | 168.54 |
| 2 | 2428605 | 1937-03-12 | 167.37 |
| 11 | 2430116 | 1941-05-01 | 167.8 |
| 13 | 2430455 | 1942-04-05 | 168.06 |
| 15 | 2430785 | 1943-03-01 | 167.92 |
| 19 | 2431450 | 1944-12-25 | 167.93 |
| 78 | 2441380 | 1972-03-03 | 167.97 |
| 84 | 2442380 | 1974-11-28 | 168.03 |
| 85 | 2442537 | 1975-05-04 | 168.13 |
| 87 | 2442885 | 1976-04-16 | 167.99 |
| 89 | 2443217 | 1977-03-14 | 167.45 |
| 91 | 2443563 | 1978-02-23 | 168.37 |
| 93 | 2443891 | 1979-01-17 | 168.81 |
| 95 | 2444226 | 1979-12-18 | 168.65 |
| 96 | 2444390 | 1980-05-30 | 168.64 |
| 100 | 2445073 | 1982-04-13 | 168.69 |
| 104 | 2445751 | 1984-02-20 | 168.71 |
| 106 | 2446085 | 1985-01-19 | 169.03 |
| 107 | 2446260 | 1985-07-13 | 168.93 |
| 109 | 2446592 | 1986-06-10 | 168.38 |
| 110 | 2446755 | 1986-11-20 | 168.32 |
| 111 | 2446932 | 1987-05-16 | 168.26 |
| 113 | 2447261 | 1988-04-09 | 168.39 |
| 115 | 2447604 | 1989-03-18 | 168.45 |
| 117 | 2447935 | 1990-02-12 | 168 |
| 119 | 2448280 | 1991-01-23 | 167.71 |
| 120 | 2448445 | 1991-07-07 | 167.21 |
| 121 | 2448608 | 1991-12-17 | 167.61 |
| 122 | 2448775 | 1992-06-01 | 167.61 |
| 123 | 2448940 | 1992-11-13 | 166.58 |
| 124 | 2449102 | 1993-04-24 | 166.95 |
| 126 | 2449454 | 1994-04-11 | 167.3 |
| 128 | 2449778 | 1995-03-01 | 167.45 |
| 130 | 2450112 | 1996-01-29 | 168.15 |
| 131 | 2450280 | 1996-07-15 | 167.79 |
| 132 | 2450449 | 1996-12-31 | 167.18 |
| 133 | 2450615 | 1997-06-15 | 167.4 |
| 134 | 2450790 | 1997-12-07 | 167.33 |
| 135 | 2450954 | 1998-05-20 | 167.41 |
| 136 | 2451120 | 1998-11-02 | 167.79 |
| 137 | 2451281 | 1999-04-12 | 167.8 |
| 139 | 2451621 | 2000-03-17 | 167.1 |
| 141 | 2451954 | 2001-02-13 | 167.2 |
| 143 | 2452298 | 2002-01-23 | 168 |
| 144 | 2452463 | 2002-07-07 | 168.84 |
| 145 | 2452623 | 2002-12-14 | 168.83 |
| 146 | 2452795 | 2003-06-04 | 168.28 |
| 147 | 2452966 | 2003-11-22 | 168.47 |
| 148 | 2453144 | 2004-05-18 | 168.81 |
| 150 | 2453470 | 2005-04-09 | 168.45 |
| 152 | 2453811 | 2006-03-16 | 167.82 |
| 154 | 2454151 | 2007-02-19 | 167.09 |
| 156 | 2454480 | 2008-01-14 | 167.05 |
| 157 | 2454644 | 2008-06-26 | 167.47 |
| 158 | 2454809 | 2008-12-08 | 167 |
| 159 | 2454977 | 2009-05-25 | 167.22 |
| 160 | 2455145 | 2009-11-09 | 168.32 |
| 161 | 2455318 | 2010-05-01 | 168.38 |
| 163 | 2455650 | 2011-03-29 | 168.5 |
| 165 | 2455991 | 2012-03-04 | 168.82 |
| 167 | 2456331 | 2013-02-07 | 168.82 |
| 169 | 2456658 | 2013-12-31 | 169.43 |
| 170 | 2456835 | 2014-06-26 | 169.58 |
| 171 | 2457001 | 2014-12-09 | 169 |
| 172 | 2457176 | 2015-06-02 | 169.44 |
| 173 | 2457350 | 2015-11-23 | 169.16 |
| 174 | 2457513 | 2016-05-04 | 168.9 |
| 176 | 2457851 | 2017-04-07 | 169.15 |
| 178 | 2458188 | 2018-03-10 | 168.7 |
| 180 | 2458519 | 2019-02-04 | 168.55 |
| 181 | 2458695 | 2019-07-30 | 168.89 |
| 182 | 2458865 | 2020-01-16 | 169.41 |
| 183 | 2459035 | 2020-07-04 | 169.4 |
| 184 | 2459199 | 2020-12-15 | 168.86 |
| 185 | 2459374 | 2021-06-08 | 168.59 |
| 186 | 2459545 | 2021-11-26 | 168.34 |
| 187 | 2459703 | 2022-05-03 | 169.08 |
| 188 | 2459875 | 2022-10-22 | 170.1 |
| 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. |