| E | O (JD) | O (dat) | Period |
| -259 | 2411536 | 1890-06-17 | 163.26 |
| -239 | 2414770 | 1899-04-25 | 162.35 |
| -237 | 2415100 | 1900-03-21 | 160.76 |
| -235 | 2415430 | 1901-02-14 | 161.42 |
| -233 | 2415760 | 1902-01-10 | 162.14 |
| -232 | 2415905 | 1902-06-04 | 162 |
| -230 | 2416220 | 1903-04-15 | 160.87 |
| -228 | 2416550 | 1904-03-10 | 160.48 |
| -226 | 2416890 | 1905-02-13 | 160.25 |
| -225 | 2417030 | 1905-07-03 | 160.53 |
| -224 | 2417200 | 1905-12-20 | 160.28 |
| -223 | 2417360 | 1906-05-29 | 159.72 |
| -222 | 2417510 | 1906-10-26 | 160.75 |
| -221 | 2417665 | 1907-03-30 | 161.2 |
| -219 | 2417990 | 1908-02-18 | 161 |
| -217 | 2418325 | 1909-01-18 | 161.36 |
| -214 | 2418810 | 1910-05-18 | 161.86 |
| -210 | 2419450 | 1912-02-17 | 162.22 |
| -207 | 2419940 | 1913-06-21 | 161.81 |
| -205 | 2420255 | 1914-05-02 | 161.76 |
| -203 | 2420585 | 1915-03-28 | 162.76 |
| -201 | 2420910 | 1916-02-16 | 163.54 |
| -199 | 2421230 | 1917-01-01 | 163.18 |
| -198 | 2421405 | 1917-06-25 | 162.04 |
| -197 | 2421575 | 1917-12-12 | 162.19 |
| -196 | 2421740 | 1918-05-26 | 162.34 |
| -194 | 2422045 | 1919-03-27 | 161.97 |
| -187 | 2423170 | 1922-04-25 | 161.47 |
| -185 | 2423515 | 1923-04-05 | 160.86 |
| -183 | 2423820 | 1924-02-04 | 161.45 |
| -181 | 2424160 | 1925-01-09 | 161.91 |
| -180 | 2424310 | 1925-06-08 | 161.11 |
| -178 | 2424635 | 1926-04-29 | 161 |
| -174 | 2425285 | 1928-02-08 | 161.46 |
| -173 | 2425435 | 1928-07-07 | 161.4 |
| -172 | 2425600 | 1928-12-19 | 161.11 |
| -171 | 2425760 | 1929-05-28 | 160.6 |
| -169 | 2426095 | 1930-04-28 | 160.62 |
| -167 | 2426410 | 1931-03-09 | 160.38 |
| -164 | 2426885 | 1932-06-26 | 160.65 |
| -163 | 2427050 | 1932-12-08 | 160.46 |
| -160 | 2427525 | 1934-03-28 | 160.2 |
| -159 | 2427680 | 1934-08-30 | 161.14 |
| -158 | 2427857 | 1935-02-23 | 161.5 |
| -156 | 2428170 | 1936-01-02 | 161.58 |
| -155 | 2428340 | 1936-06-20 | 162.89 |
| -154 | 2428500 | 1936-11-27 | 163 |
| -153 | 2428665 | 1937-05-11 | 162.61 |
| -151 | 2428980 | 1938-03-22 | 162.72 |
| -149 | 2429320 | 1939-02-25 | 162.41 |
| -147 | 2429640 | 1940-01-11 | 162.34 |
| -144 | 2430127 | 1941-05-12 | 161.93 |
| -142 | 2430451 | 1942-04-01 | 161.25 |
| -140 | 2430774 | 1943-02-18 | 161.64 |
| -138 | 2431099 | 1944-01-09 | 161.78 |
| -137 | 2431242 | 1944-05-31 | 161.3 |
| -135 | 2431573 | 1945-04-27 | 162.07 |
| -133 | 2431913 | 1946-04-02 | 162.43 |
| -131 | 2432222 | 1947-02-05 | 162.69 |
| -128 | 2432711 | 1948-06-08 | 162.25 |
| -126 | 2433052 | 1949-05-15 | 161.75 |
| -124 | 2433369 | 1950-03-28 | 161.78 |
| -122 | 2433690 | 1951-02-12 | 162.09 |
| -81 | 2440320 | 1969-04-08 | 161.88 |
| -79 | 2440635 | 1970-02-17 | 161.73 |
| -78 | 2440810 | 1970-08-11 | 161.83 |
| -77 | 2440980 | 1971-01-28 | 161.94 |
| -72 | 2441780 | 1973-04-07 | 162.41 |
| -70 | 2442108 | 1974-03-01 | 162.31 |
| -68 | 2442429 | 1975-01-16 | 161.77 |
| -66 | 2442755 | 1975-12-08 | 161.31 |
| -65 | 2442910 | 1976-05-11 | 161.42 |
| -63 | 2443242 | 1977-04-08 | 161.72 |
| -61 | 2443563 | 1978-02-23 | 161.92 |
| -59 | 2443875 | 1979-01-01 | 162.6 |
| -57 | 2444210 | 1979-12-02 | 163 |
| -56 | 2444370 | 1980-05-10 | 163.27 |
| -54 | 2444700 | 1981-04-05 | 163.68 |
| -52 | 2445030 | 1982-03-01 | 163.33 |
| -50 | 2445360 | 1983-01-25 | 162.68 |
| -48 | 2445690 | 1983-12-21 | 162.38 |
| -47 | 2445840 | 1984-05-19 | 162 |
| -45 | 2446165 | 1985-04-09 | 160.92 |
| -43 | 2446482 | 1986-02-20 | 159.87 |
| -41 | 2446810 | 1987-01-14 | 160.2 |
| -40 | 2446970 | 1987-06-23 | 160.77 |
| -38 | 2447282 | 1988-04-30 | 161.52 |
| -36 | 2447605 | 1989-03-19 | 161.92 |
| -34 | 2447930 | 1990-02-07 | 161.36 |
| -32 | 2448255 | 1990-12-29 | 161.69 |
| -31 | 2448430 | 1991-06-22 | 162.5 |
| -29 | 2448748 | 1992-05-05 | 162.92 |
| -27 | 2449066 | 1993-03-19 | 162.78 |
| -25 | 2449390 | 1994-02-06 | 161.86 |
| -23 | 2449722 | 1995-01-04 | 161.64 |
| -22 | 2449886 | 1995-06-17 | 162.45 |
| -21 | 2450043 | 1995-11-21 | 163.68 |
| -20 | 2450203 | 1996-04-29 | 163.43 |
| -18 | 2450531 | 1997-03-23 | 161.52 |
| -16 | 2450857 | 1998-02-12 | 162.13 |
| -14 | 2451200 | 1999-01-21 | 163.08 |
| -13 | 2451344 | 1999-06-14 | 162.77 |
| -11 | 2451656 | 2000-04-21 | 162.52 |
| -9 | 2452002 | 2001-04-02 | 161.93 |
| -7 | 2452321 | 2002-02-15 | 162.11 |
| -5 | 2452645 | 2003-01-05 | 162.55 |
| -2 | 2453131 | 2004-05-05 | 162.33 |
| 0 | 2453460 | 2005-03-30 | 162.37 |
| 9 | 2454920 | 2009-03-29 | 162.48 |
| 16 | 2456045 | 2012-04-27 | 162.23 |
| 18 | 2456379 | 2013-03-27 | 162.12 |
| 20 | 2456712 | 2014-02-23 | 162.37 |
| 22 | 2457028 | 2015-01-05 | 163.42 |
| 23 | 2457184 | 2015-06-10 | 163.63 |
| 24 | 2457351 | 2015-11-24 | 162.33 |
| 25 | 2457524 | 2016-05-15 | 162.56 |
| 26 | 2457690 | 2016-10-28 | 164.11 |
| 27 | 2457843 | 2017-03-30 | 164 |
| 29 | 2458170 | 2018-02-20 | 162.28 |
| 31 | 2458496 | 2019-01-12 | 161.39 |
| 32 | 2458670 | 2019-07-05 | 162.06 |
| 33 | 2458817 | 2019-11-29 | 162.28 |
| 34 | 2458979 | 2020-05-09 | 161.68 |
| 35 | 2459140 | 2020-10-17 | 159.73 |
| 36 | 2459310 | 2021-04-05 | 159.92 |
| 38 | 2459624 | 2022-02-13 | 162.27 |
| 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. |