| E | O (JD) | O (dat) | Period |
| -81 | 2414910 | 1899-09-12 | 273.09 |
| -80 | 2415195 | 1900-06-24 | 272.67 |
| -77 | 2416030 | 1902-10-07 | 272 |
| -75 | 2416575 | 1904-04-04 | 272.28 |
| -73 | 2417100 | 1905-09-11 | 272.51 |
| -72 | 2417370 | 1906-06-08 | 271.81 |
| -68 | 2418465 | 1909-06-07 | 270.95 |
| -65 | 2419270 | 1911-08-21 | 270.27 |
| -64 | 2419560 | 1912-06-06 | 270.06 |
| -61 | 2420380 | 1914-09-04 | 269.64 |
| -60 | 2420610 | 1915-04-22 | 269.03 |
| -56 | 2421700 | 1918-04-16 | 268.37 |
| -50 | 2423320 | 1922-09-22 | 268.1 |
| -49 | 2423585 | 1923-06-14 | 267.68 |
| -46 | 2424375 | 1925-08-12 | 267.68 |
| -45 | 2424640 | 1926-05-04 | 268.48 |
| -43 | 2425180 | 1927-10-26 | 268.35 |
| -41 | 2425720 | 1929-04-18 | 268.94 |
| -39 | 2426250 | 1930-09-30 | 269.92 |
| -38 | 2426522 | 1931-06-29 | 271.65 |
| -37 | 2426810 | 1932-04-12 | 272.72 |
| -36 | 2427081 | 1933-01-08 | 273.36 |
| -35 | 2427356 | 1933-10-10 | 274.55 |
| -34 | 2427625 | 1934-07-06 | 275.03 |
| -33 | 2427911 | 1935-04-18 | 274.35 |
| -31 | 2428456 | 1936-10-14 | 273.32 |
| -30 | 2428720 | 1937-07-05 | 272.56 |
| -29 | 2429010 | 1938-04-21 | 271.17 |
| -27 | 2429550 | 1939-10-13 | 270.48 |
| -26 | 2429815 | 1940-07-04 | 269.65 |
| -25 | 2430080 | 1941-03-26 | 268.98 |
| -23 | 2430618 | 1942-09-15 | 268.71 |
| -19 | 2431690 | 1945-08-22 | 268.03 |
| -18 | 2431965 | 1946-05-24 | 267.51 |
| -17 | 2432230 | 1947-02-13 | 268.63 |
| -15 | 2432760 | 1948-07-27 | 268.71 |
| -14 | 2433035 | 1949-04-28 | 268.78 |
| -11 | 2433832 | 1951-07-04 | 268.93 |
| -7 | 2434890 | 1954-05-27 | 269.02 |
| 12 | 2440030 | 1968-06-22 | 269.17 |
| 19 | 2441900 | 1973-08-05 | 269.28 |
| 22 | 2442710 | 1975-10-24 | 269.4 |
| 23 | 2442991 | 1976-07-31 | 269.59 |
| 24 | 2443260 | 1977-04-26 | 269.79 |
| 27 | 2444071 | 1979-07-16 | 269.34 |
| 30 | 2444875 | 1981-09-27 | 269.61 |
| 31 | 2445153 | 1982-07-02 | 269.41 |
| 32 | 2445410 | 1983-03-16 | 269.07 |
| 34 | 2445950 | 1984-09-06 | 269.49 |
| 35 | 2446212 | 1985-05-26 | 269.89 |
| 37 | 2446760 | 1986-11-25 | 270.6 |
| 38 | 2447033 | 1987-08-25 | 270.85 |
| 39 | 2447297 | 1988-05-15 | 271.57 |
| 42 | 2448120 | 1990-08-16 | 271.87 |
| 43 | 2448390 | 1991-05-13 | 272.13 |
| 46 | 2449207 | 1993-08-07 | 272.22 |
| 47 | 2449474 | 1994-05-01 | 272.24 |
| 49 | 2450025 | 1995-11-03 | 272.25 |
| 50 | 2450295 | 1996-07-30 | 271.95 |
| 51 | 2450569 | 1997-04-30 | 271.64 |
| 52 | 2450845 | 1998-01-31 | 271.63 |
| 53 | 2451110 | 1998-10-23 | 271.61 |
| 54 | 2451379 | 1999-07-19 | 271.05 |
| 55 | 2451652 | 2000-04-17 | 271.16 |
| 56 | 2451916 | 2001-01-06 | 271.13 |
| 57 | 2452199 | 2001-10-16 | 270.94 |
| 58 | 2452468 | 2002-07-12 | 271.19 |
| 59 | 2452735 | 2003-04-05 | 271.26 |
| 60 | 2453011 | 2004-01-06 | 271.25 |
| 61 | 2453281 | 2004-10-02 | 271.35 |
| 62 | 2453546 | 2005-06-24 | 271.35 |
| 63 | 2453820 | 2006-03-25 | 271.57 |
| 64 | 2454093 | 2006-12-23 | 272.23 |
| 65 | 2454365 | 2007-09-21 | 272.4 |
| 66 | 2454637 | 2008-06-19 | 272.62 |
| 67 | 2454915 | 2009-03-24 | 272.98 |
| 68 | 2455180 | 2009-12-14 | 272.7 |
| 69 | 2455463 | 2010-09-23 | 272.65 |
| 70 | 2455731 | 2011-06-18 | 272.77 |
| 71 | 2456000 | 2012-03-13 | 272.34 |
| 72 | 2456277 | 2012-12-15 | 271.85 |
| 73 | 2456544 | 2013-09-08 | 271.82 |
| 74 | 2456820 | 2014-06-11 | 271.07 |
| 75 | 2457096 | 2015-03-14 | 270.37 |
| 76 | 2457358 | 2015-12-01 | 269.39 |
| 77 | 2457629 | 2016-08-28 | 268.48 |
| 78 | 2457904 | 2017-05-30 | 268.02 |
| 79 | 2458168 | 2018-02-18 | 267.7 |
| 80 | 2458427 | 2018-11-04 | 267.64 |
| 81 | 2458692 | 2019-07-27 | 267.79 |
| 82 | 2458963 | 2020-04-23 | 267.58 |
| 83 | 2459233 | 2021-01-18 | 267.55 |
| 84 | 2459507 | 2021-10-19 | 268.54 |
| 85 | 2459774 | 2022-07-13 | 270 |
| 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. |