| E | O (JD) | O (dat) | Period |
| -109 | 2410199 | 1886-10-19 | 274.03 |
| -95 | 2414016 | 1897-04-01 | 275.22 |
| -94 | 2414268 | 1897-12-09 | 275.58 |
| -86 | 2416460 | 1903-12-11 | 274.68 |
| -85 | 2416750 | 1904-09-26 | 274.75 |
| -69 | 2421180 | 1916-11-12 | 275.77 |
| -67 | 2421717 | 1918-05-03 | 276.4 |
| -66 | 2421998 | 1919-02-08 | 276.25 |
| -65 | 2422274 | 1919-11-11 | 274.63 |
| -63 | 2422832 | 1921-05-22 | 273.32 |
| -62 | 2423098 | 1922-02-12 | 274.42 |
| -61 | 2423372 | 1922-11-13 | 274.61 |
| -58 | 2424170 | 1925-01-19 | 274.6 |
| -53 | 2425560 | 1928-11-09 | 274.23 |
| -52 | 2425839 | 1929-08-15 | 274.11 |
| -51 | 2426122 | 1930-05-25 | 275.39 |
| -50 | 2426398 | 1931-02-25 | 276.11 |
| -49 | 2426662 | 1931-11-16 | 274.5 |
| -47 | 2427209 | 1933-05-16 | 273.56 |
| -46 | 2427493 | 1934-02-24 | 273 |
| -45 | 2427759 | 1934-11-17 | 273.31 |
| -44 | 2428032 | 1935-08-17 | 273.46 |
| -43 | 2428306 | 1936-05-17 | 272.28 |
| -42 | 2428582 | 1937-02-17 | 272.92 |
| -41 | 2428851 | 1937-11-13 | 274.36 |
| -40 | 2429122 | 1938-08-11 | 274.15 |
| -39 | 2429392 | 1939-05-08 | 274.51 |
| -38 | 2429681 | 1940-02-21 | 276.15 |
| -37 | 2429951 | 1940-11-17 | 277.14 |
| -36 | 2430225 | 1941-08-18 | 277.14 |
| -35 | 2430506 | 1942-05-26 | 276.07 |
| -34 | 2430793 | 1943-03-09 | 275.35 |
| -33 | 2431060 | 1943-12-01 | 276.07 |
| -32 | 2431334 | 1944-08-31 | 275.64 |
| -31 | 2431604 | 1945-05-28 | 274 |
| -30 | 2431883 | 1946-03-03 | 272.94 |
| -29 | 2432158 | 1946-12-03 | 272.72 |
| -28 | 2432432 | 1947-09-03 | 273.36 |
| -27 | 2432703 | 1948-05-31 | 273.5 |
| -26 | 2432971 | 1949-02-23 | 272.92 |
| -25 | 2433241 | 1949-11-20 | 272.71 |
| -24 | 2433524 | 1950-08-30 | 272.35 |
| -23 | 2433792 | 1951-05-25 | 273.42 |
| -22 | 2434070 | 1952-02-27 | 274.57 |
| -21 | 2434338 | 1952-11-21 | 274.57 |
| -20 | 2434610 | 1953-08-20 | 275.08 |
| -19 | 2434892 | 1954-05-29 | 275.07 |
| -18 | 2435164 | 1955-02-25 | 274.92 |
| -17 | 2435445 | 1955-12-03 | 275.71 |
| -16 | 2435722 | 1956-09-05 | 275.07 |
| -15 | 2435991 | 1957-06-01 | 273.64 |
| -14 | 2436266 | 1958-03-03 | 272.92 |
| -13 | 2436542 | 1958-12-04 | 272.42 |
| -12 | 2436811 | 1959-08-30 | 272.57 |
| -11 | 2437076 | 1960-05-21 | 273.51 |
| -10 | 2437354 | 1961-02-23 | 273.65 |
| -9 | 2437627 | 1961-11-23 | 273.86 |
| -8 | 2437902 | 1962-08-25 | 275 |
| -7 | 2438184 | 1963-06-03 | 275.21 |
| -6 | 2438455 | 1964-02-29 | 275.07 |
| -5 | 2438732 | 1964-12-02 | 276.07 |
| -4 | 2439005 | 1965-09-01 | 276.5 |
| -3 | 2439278 | 1966-06-01 | 276.21 |
| -2 | 2439554 | 1967-03-04 | 276.36 |
| -1 | 2439840 | 1967-12-15 | 276.44 |
| 0 | 2440117 | 1968-09-17 | 276.01 |
| 1 | 2440389 | 1969-06-16 | 275.87 |
| 2 | 2440667 | 1970-03-21 | 275.86 |
| 3 | 2440940 | 1970-12-19 | 274.92 |
| 4 | 2441207 | 1971-09-12 | 274.14 |
| 5 | 2441487 | 1972-06-18 | 273.78 |
| 6 | 2441769 | 1973-03-27 | 273.21 |
| 7 | 2442037 | 1973-12-20 | 273.5 |
| 8 | 2442307 | 1974-09-16 | 273.85 |
| 9 | 2442582 | 1975-06-18 | 272.93 |
| 10 | 2442850 | 1976-03-12 | 271.51 |
| 11 | 2443126 | 1976-12-13 | 271.87 |
| 12 | 2443402 | 1977-09-15 | 273.15 |
| 13 | 2443675 | 1978-06-15 | 272.57 |
| 14 | 2443932 | 1979-02-27 | 271.78 |
| 15 | 2444218 | 1979-12-10 | 271.78 |
| 16 | 2444495 | 1980-09-12 | 272.14 |
| 17 | 2444753 | 1981-05-28 | 273 |
| 18 | 2445028 | 1982-02-27 | 273.5 |
| 19 | 2445305 | 1982-12-01 | 272.5 |
| 20 | 2445582 | 1983-09-04 | 273.01 |
| 21 | 2445847 | 1984-05-26 | 274.36 |
| 22 | 2446132 | 1985-03-07 | 274.78 |
| 23 | 2446396 | 1985-11-26 | 274.35 |
| 24 | 2446674 | 1986-08-31 | 274 |
| 25 | 2446948 | 1987-06-01 | 272.92 |
| 26 | 2447232 | 1988-03-11 | 271.57 |
| 27 | 2447496 | 1988-11-30 | 272.28 |
| 28 | 2447769 | 1989-08-30 | 272.72 |
| 29 | 2448031 | 1990-05-19 | 272.01 |
| 30 | 2448299 | 1991-02-11 | 272.37 |
| 31 | 2448583 | 1991-11-22 | 273.22 |
| 32 | 2448857 | 1992-08-22 | 274.07 |
| 33 | 2449131 | 1993-05-23 | 275.07 |
| 34 | 2449410 | 1994-02-26 | 274.78 |
| 35 | 2449680 | 1994-11-23 | 274.57 |
| 36 | 2449957 | 1995-08-27 | 274 |
| 37 | 2450224 | 1996-05-20 | 273.64 |
| 38 | 2450505 | 1997-02-25 | 274.65 |
| 39 | 2450779 | 1997-11-26 | 275.22 |
| 40 | 2451045 | 1998-08-19 | 275.94 |
| 41 | 2451327 | 1999-05-28 | 276.65 |
| 42 | 2451608 | 2000-03-04 | 276.64 |
| 43 | 2451882 | 2000-12-03 | 277.21 |
| 44 | 2452162 | 2001-09-09 | 276.57 |
| 45 | 2452440 | 2002-06-14 | 275.28 |
| 46 | 2452717 | 2003-03-18 | 275.21 |
| 47 | 2452988 | 2003-12-14 | 276.07 |
| 48 | 2453256 | 2004-09-07 | 275.5 |
| 49 | 2453533 | 2005-06-11 | 273.8 |
| 50 | 2453810 | 2006-03-15 | 273.72 |
| 51 | 2454099 | 2006-12-29 | 275.37 |
| 52 | 2454360 | 2007-09-16 | 276.15 |
| 53 | 2454630 | 2008-06-12 | 274.35 |
| 54 | 2454907 | 2009-03-16 | 273.64 |
| 55 | 2455192 | 2009-12-26 | 274.57 |
| 56 | 2455463 | 2010-09-23 | 275.14 |
| 57 | 2455721 | 2011-06-08 | 275.78 |
| 58 | 2456019 | 2012-04-01 | 275.78 |
| 59 | 2456284 | 2012-12-22 | 275.57 |
| 60 | 2456558 | 2013-09-22 | 277.01 |
| 61 | 2456840 | 2014-07-01 | 277.08 |
| 62 | 2457120 | 2015-04-07 | 276.79 |
| 63 | 2457393 | 2016-01-05 | 278.21 |
| 64 | 2457669 | 2016-10-07 | 277.92 |
| 65 | 2457950 | 2017-07-15 | 277.5 |
| 66 | 2458228 | 2018-04-19 | 278 |
| 67 | 2458509 | 2019-01-25 | 278.5 |
| 68 | 2458780 | 2019-10-23 | 277.92 |
| 69 | 2459065 | 2020-08-03 | 277.3 |
| 70 | 2459340 | 2021-05-05 | 277.3 |
| 71 | 2459621 | 2022-02-10 | 278.09 |
| 72 | 2459889 | 2022-11-05 | 279.51 |
| 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. |