| E | O (JD) | O (dat) | Period |
| -81 | 2412530 | 1893-03-07 | 327.82 |
| -80 | 2412840 | 1894-01-11 | 327.68 |
| -78 | 2413500 | 1895-11-02 | 327.67 |
| -72 | 2415474 | 1901-03-30 | 327.46 |
| -71 | 2415793 | 1902-02-12 | 325.95 |
| -70 | 2416130 | 1903-01-15 | 325.1 |
| -69 | 2416450 | 1903-12-01 | 324.02 |
| -68 | 2416780 | 1904-10-26 | 321.65 |
| -67 | 2417100 | 1905-09-11 | 317.72 |
| -65 | 2417700 | 1907-05-04 | 316.03 |
| -64 | 2418030 | 1908-03-29 | 315.82 |
| -63 | 2418344 | 1909-02-06 | 316.37 |
| -62 | 2418665 | 1909-12-24 | 316.85 |
| -61 | 2418980 | 1910-11-04 | 317.75 |
| -57 | 2420230 | 1914-04-07 | 319.38 |
| -56 | 2420572 | 1915-03-15 | 320.31 |
| -55 | 2420898 | 1916-02-04 | 321.96 |
| -54 | 2421216 | 1916-12-18 | 322.79 |
| -53 | 2421535 | 1917-11-02 | 324.03 |
| -52 | 2421870 | 1918-10-03 | 325.06 |
| -51 | 2422210 | 1919-09-08 | 324.83 |
| -47 | 2423500 | 1923-03-21 | 325.06 |
| -46 | 2423812 | 1924-01-27 | 325.02 |
| -45 | 2424145 | 1924-12-25 | 324.9 |
| -44 | 2424460 | 1925-11-05 | 325.15 |
| -43 | 2424800 | 1926-10-11 | 326.07 |
| -42 | 2425125 | 1927-09-01 | 327.76 |
| -41 | 2425440 | 1928-07-12 | 328.72 |
| -40 | 2425770 | 1929-06-07 | 329.07 |
| -39 | 2426118 | 1930-05-21 | 329.7 |
| -38 | 2426452 | 1931-04-20 | 329.19 |
| -37 | 2426763 | 1932-02-25 | 326.77 |
| -36 | 2427098 | 1933-01-25 | 324.04 |
| -35 | 2427430 | 1933-12-23 | 321.79 |
| -34 | 2427760 | 1934-11-18 | 320.36 |
| -33 | 2428080 | 1935-10-04 | 319.37 |
| -30 | 2429020 | 1938-05-01 | 318.88 |
| -29 | 2429320 | 1939-02-25 | 318.16 |
| -28 | 2429648 | 1940-01-19 | 318.23 |
| -27 | 2429981 | 1940-12-17 | 318.97 |
| -26 | 2430290 | 1941-10-22 | 320.41 |
| -24 | 2430930 | 1943-07-24 | 322.56 |
| -22 | 2431570 | 1945-04-24 | 323.91 |
| -21 | 2431900 | 1946-03-20 | 324.11 |
| -20 | 2432230 | 1947-02-13 | 322.68 |
| -19 | 2432559 | 1948-01-08 | 322.46 |
| -18 | 2432890 | 1948-12-04 | 322.41 |
| -17 | 2433220 | 1949-10-30 | 322.86 |
| -12 | 2434830 | 1954-03-28 | 323.22 |
| -2 | 2438024 | 1962-12-25 | 323.5 |
| -1 | 2438348 | 1963-11-14 | 323.81 |
| 0 | 2438682 | 1964-10-13 | 324.1 |
| 6 | 2440650 | 1970-03-04 | 324.79 |
| 7 | 2440990 | 1971-02-07 | 326.47 |
| 8 | 2441319 | 1972-01-02 | 329.82 |
| 9 | 2441650 | 1972-11-28 | 329.56 |
| 10 | 2441970 | 1973-10-14 | 329.31 |
| 11 | 2442310 | 1974-09-19 | 329.36 |
| 12 | 2442642 | 1975-08-17 | 329.05 |
| 13 | 2442970 | 1976-07-10 | 329.25 |
| 14 | 2443280 | 1977-05-16 | 328.82 |
| 15 | 2443620 | 1978-04-21 | 328.38 |
| 16 | 2443953 | 1979-03-20 | 328.31 |
| 17 | 2444284 | 1980-02-14 | 328.55 |
| 18 | 2444614 | 1981-01-09 | 328.82 |
| 19 | 2444930 | 1981-11-21 | 328.72 |
| 20 | 2445255 | 1982-10-12 | 328.16 |
| 21 | 2445600 | 1983-09-22 | 328.95 |
| 22 | 2445925 | 1984-08-12 | 329.71 |
| 23 | 2446250 | 1985-07-03 | 330.81 |
| 24 | 2446570 | 1986-05-19 | 331.65 |
| 25 | 2446908 | 1987-04-22 | 331.5 |
| 26 | 2447255 | 1988-04-03 | 331.05 |
| 27 | 2447582 | 1989-02-24 | 331.39 |
| 28 | 2447918 | 1990-01-26 | 331.35 |
| 29 | 2448243 | 1990-12-17 | 331.46 |
| 30 | 2448568 | 1991-11-07 | 331.28 |
| 31 | 2448899 | 1992-10-03 | 330.75 |
| 32 | 2449231 | 1993-08-31 | 330.64 |
| 33 | 2449559 | 1994-07-25 | 330.51 |
| 35 | 2450230 | 1996-05-26 | 330.61 |
| 36 | 2450568 | 1997-04-29 | 330.75 |
| 37 | 2450888 | 1998-03-15 | 330.04 |
| 38 | 2451212 | 1999-02-02 | 329.11 |
| 39 | 2451544 | 1999-12-31 | 327.94 |
| 40 | 2451873 | 2000-11-24 | 326.25 |
| 41 | 2452209 | 2001-10-26 | 325.35 |
| 42 | 2452524 | 2002-09-06 | 325.03 |
| 43 | 2452848 | 2003-07-27 | 324 |
| 44 | 2453170 | 2004-06-13 | 322.54 |
| 45 | 2453492 | 2005-05-01 | 321.29 |
| 46 | 2453816 | 2006-03-21 | 320.32 |
| 47 | 2454140 | 2007-02-08 | 320.17 |
| 48 | 2454455 | 2007-12-20 | 320.25 |
| 49 | 2454770 | 2008-10-30 | 319.79 |
| 50 | 2455088 | 2009-09-13 | 318.85 |
| 51 | 2455408 | 2010-07-30 | 318.48 |
| 52 | 2455730 | 2011-06-17 | 318.33 |
| 53 | 2456061 | 2012-05-13 | 317.99 |
| 54 | 2456368 | 2013-03-16 | 317.08 |
| 55 | 2456675 | 2014-01-17 | 315.35 |
| 56 | 2457002 | 2014-12-10 | 314.38 |
| 57 | 2457320 | 2015-10-24 | 313.82 |
| 58 | 2457628 | 2016-08-27 | 314.27 |
| 59 | 2457935 | 2017-06-30 | 315.47 |
| 60 | 2458235 | 2018-04-26 | 316.06 |
| 61 | 2458563 | 2019-03-20 | 316.27 |
| 62 | 2458883 | 2020-02-03 | 317.05 |
| 63 | 2459214 | 2020-12-30 | 318.08 |
| 64 | 2459530 | 2021-11-11 | 319.13 |
| 65 | 2459842 | 2022-09-19 | 319.9 |
| 66 | 2460160 | 2023-08-03 | 318.71 |
| 67 | 2460477 | 2024-06-15 | 317.71 |
| 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. |