| E | O (JD) | O (dat) | Period |
| -81 | 2414640 | 1898-12-16 | 169.1 |
| -79 | 2415000 | 1899-12-11 | 169.62 |
| -78 | 2415165 | 1900-05-25 | 169.39 |
| -76 | 2415495 | 1901-04-20 | 168.98 |
| -74 | 2415835 | 1902-03-26 | 168.57 |
| -72 | 2416170 | 1903-02-24 | 168.43 |
| -70 | 2416520 | 1904-02-09 | 168.05 |
| -68 | 2416850 | 1905-01-04 | 168.13 |
| -65 | 2417350 | 1906-05-19 | 167.87 |
| -63 | 2417680 | 1907-04-14 | 167.69 |
| -61 | 2418020 | 1908-03-19 | 167.59 |
| -59 | 2418360 | 1909-02-22 | 167.46 |
| -57 | 2418695 | 1910-01-23 | 167.54 |
| -50 | 2419860 | 1913-04-02 | 167.55 |
| -48 | 2420200 | 1914-03-08 | 167.56 |
| -46 | 2420535 | 1915-02-06 | 167.33 |
| -44 | 2420870 | 1916-01-07 | 167.19 |
| -43 | 2421035 | 1916-06-20 | 167.14 |
| -41 | 2421370 | 1917-05-21 | 167.12 |
| -40 | 2421540 | 1917-11-07 | 166.65 |
| -39 | 2421700 | 1918-04-16 | 166.22 |
| -37 | 2422037 | 1919-03-19 | 166.48 |
| -35 | 2422370 | 1920-02-15 | 167.85 |
| -33 | 2422705 | 1921-01-15 | 168.48 |
| -31 | 2423030 | 1921-12-06 | 168.85 |
| -30 | 2423190 | 1922-05-15 | 168.98 |
| -28 | 2423543 | 1923-05-03 | 168.99 |
| -20 | 2424910 | 1927-01-29 | 169.07 |
| -15 | 2425750 | 1929-05-18 | 168.98 |
| -13 | 2426090 | 1930-04-23 | 168.96 |
| -11 | 2426417 | 1931-03-16 | 169.07 |
| -9 | 2426750 | 1932-02-12 | 168.5 |
| -7 | 2427090 | 1933-01-17 | 167.93 |
| -5 | 2427416 | 1933-12-09 | 168.04 |
| -4 | 2427588 | 1934-05-30 | 168.28 |
| -3 | 2427785 | 1934-12-13 | 168.66 |
| -2 | 2427929 | 1935-05-06 | 168.78 |
| 0 | 2428269 | 1936-04-10 | 168.43 |
| 2 | 2428605 | 1937-03-12 | 168.47 |
| 4 | 2428945 | 1938-02-15 | 167.97 |
| 7 | 2429450 | 1939-07-05 | 167.4 |
| 8 | 2429620 | 1939-12-22 | 167.57 |
| 11 | 2430115 | 1941-04-30 | 167.31 |
| 13 | 2430460 | 1942-04-10 | 167.44 |
| 15 | 2430785 | 1943-03-01 | 167.1 |
| 18 | 2431280 | 1944-07-08 | 166.98 |
| 19 | 2431450 | 1944-12-25 | 167.4 |
| 20 | 2431620 | 1945-06-13 | 168.12 |
| 22 | 2431970 | 1946-05-29 | 168.17 |
| 26 | 2432620 | 1948-03-09 | 168.2 |
| 32 | 2433625 | 1950-12-09 | 168.15 |
| 37 | 2434480 | 1953-04-12 | 168.14 |
| 78 | 2441380 | 1972-03-03 | 168.13 |
| 82 | 2442050 | 1974-01-02 | 168.15 |
| 84 | 2442380 | 1974-11-28 | 168.25 |
| 85 | 2442537 | 1975-05-04 | 168.21 |
| 87 | 2442885 | 1976-04-16 | 168.02 |
| 89 | 2443217 | 1977-03-14 | 167.82 |
| 91 | 2443563 | 1978-02-23 | 168.33 |
| 93 | 2443891 | 1979-01-17 | 168.59 |
| 95 | 2444226 | 1979-12-18 | 168.83 |
| 96 | 2444390 | 1980-05-30 | 168.7 |
| 100 | 2445073 | 1982-04-13 | 168.7 |
| 104 | 2445751 | 1984-02-20 | 168.74 |
| 106 | 2446085 | 1985-01-19 | 168.86 |
| 107 | 2446260 | 1985-07-13 | 168.9 |
| 109 | 2446592 | 1986-06-10 | 168.71 |
| 110 | 2446755 | 1986-11-20 | 168.48 |
| 111 | 2446932 | 1987-05-16 | 168.39 |
| 113 | 2447261 | 1988-04-09 | 168.3 |
| 115 | 2447604 | 1989-03-18 | 168.12 |
| 117 | 2447935 | 1990-02-12 | 168.08 |
| 119 | 2448280 | 1991-01-23 | 167.79 |
| 120 | 2448445 | 1991-07-07 | 167.77 |
| 121 | 2448608 | 1991-12-17 | 167.67 |
| 122 | 2448775 | 1992-06-01 | 167.26 |
| 123 | 2448940 | 1992-11-13 | 167.19 |
| 124 | 2449102 | 1993-04-24 | 167.06 |
| 126 | 2449454 | 1994-04-11 | 167.23 |
| 128 | 2449778 | 1995-03-01 | 167.59 |
| 130 | 2450112 | 1996-01-29 | 167.7 |
| 131 | 2450280 | 1996-07-15 | 167.76 |
| 132 | 2450449 | 1996-12-31 | 167.5 |
| 133 | 2450615 | 1997-06-15 | 167.07 |
| 134 | 2450790 | 1997-12-07 | 167.43 |
| 135 | 2450954 | 1998-05-20 | 167.71 |
| 136 | 2451120 | 1998-11-02 | 167.75 |
| 137 | 2451281 | 1999-04-12 | 167.51 |
| 139 | 2451621 | 2000-03-17 | 167.51 |
| 141 | 2451954 | 2001-02-13 | 167.54 |
| 143 | 2452298 | 2002-01-23 | 168.12 |
| 144 | 2452463 | 2002-07-07 | 168.27 |
| 145 | 2452623 | 2002-12-14 | 168.55 |
| 146 | 2452795 | 2003-06-04 | 168.66 |
| 147 | 2452966 | 2003-11-22 | 168.55 |
| 148 | 2453144 | 2004-05-18 | 168.21 |
| 150 | 2453470 | 2005-04-09 | 168.07 |
| 152 | 2453811 | 2006-03-16 | 167.92 |
| 154 | 2454151 | 2007-02-19 | 167.53 |
| 156 | 2454480 | 2008-01-14 | 167.36 |
| 157 | 2454644 | 2008-06-26 | 167.13 |
| 158 | 2454809 | 2008-12-08 | 167.53 |
| 159 | 2454977 | 2009-05-25 | 167.75 |
| 160 | 2455145 | 2009-11-09 | 167.81 |
| 161 | 2455318 | 2010-05-01 | 168.35 |
| 163 | 2455650 | 2011-03-29 | 168.53 |
| 165 | 2455991 | 2012-03-04 | 168.79 |
| 167 | 2456331 | 2013-02-07 | 169.05 |
| 169 | 2456658 | 2013-12-31 | 169.11 |
| 170 | 2456835 | 2014-06-26 | 169.21 |
| 171 | 2457001 | 2014-12-09 | 169.43 |
| 172 | 2457176 | 2015-06-02 | 169.38 |
| 173 | 2457350 | 2015-11-23 | 169.41 |
| 174 | 2457513 | 2016-05-04 | 169.45 |
| 175 | 2457685 | 2016-10-23 | 168.64 |
| 176 | 2457851 | 2017-04-07 | 168.56 |
| 177 | 2458020 | 2017-09-23 | 168.36 |
| 178 | 2458188 | 2018-03-10 | 168.49 |
| 179 | 2458355 | 2018-08-24 | 168.66 |
| 180 | 2458519 | 2019-02-04 | 168.87 |
| 181 | 2458695 | 2019-07-30 | 169.32 |
| 182 | 2458865 | 2020-01-16 | 169.09 |
| 183 | 2459035 | 2020-07-04 | 169.06 |
| 184 | 2459199 | 2020-12-15 | 169.2 |
| 185 | 2459374 | 2021-06-08 | 169.35 |
| 186 | 2459545 | 2021-11-26 | 169.14 |
| 187 | 2459703 | 2022-05-03 | 169.35 |
| 188 | 2459875 | 2022-10-22 | 169.45 |
| 189 | 2460048 | 2023-04-13 | 169.68 |
| 190 | 2460220 | 2023-10-02 | 169.54 |
| 191 | 2460388 | 2024-03-18 | 170 |
| 192 | 2460560 | 2024-09-06 | 171.31 |
| 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. |