| E | O (JD) | O (dat) | Period |
| -120 | 2415270 | 1900-09-07 | 244.82 |
| -118 | 2415758 | 1902-01-08 | 245.31 |
| -117 | 2416010 | 1902-09-17 | 245.99 |
| -116 | 2416250 | 1903-05-15 | 246.69 |
| -114 | 2416740 | 1904-09-16 | 247.6 |
| -113 | 2416989 | 1905-05-23 | 247.5 |
| -111 | 2417482 | 1906-09-28 | 247.64 |
| -110 | 2417740 | 1907-06-13 | 249.12 |
| -108 | 2418240 | 1908-10-25 | 249.96 |
| -107 | 2418478 | 1909-06-20 | 250.29 |
| -104 | 2419230 | 1911-07-12 | 250.54 |
| -101 | 2419988 | 1913-08-08 | 250.31 |
| -98 | 2420740 | 1915-08-30 | 250.35 |
| -95 | 2421490 | 1917-09-18 | 250.61 |
| -93 | 2422000 | 1919-02-10 | 250.05 |
| -92 | 2422240 | 1919-10-08 | 249.1 |
| -89 | 2422990 | 1921-10-27 | 247.93 |
| -86 | 2423740 | 1923-11-16 | 246.67 |
| -85 | 2423980 | 1924-07-13 | 246.54 |
| -83 | 2424470 | 1925-11-15 | 246.25 |
| -81 | 2424950 | 1927-03-10 | 244.5 |
| -80 | 2425200 | 1927-11-15 | 243.83 |
| -79 | 2425450 | 1928-07-22 | 244.64 |
| -78 | 2425690 | 1929-03-19 | 246.12 |
| -77 | 2425930 | 1929-11-14 | 247.44 |
| -76 | 2426179 | 1930-07-21 | 247.94 |
| -75 | 2426430 | 1931-03-29 | 248.56 |
| -73 | 2426928 | 1932-08-08 | 249.11 |
| -72 | 2427181 | 1933-04-18 | 249.45 |
| -70 | 2427684 | 1934-09-03 | 249.58 |
| -69 | 2427930 | 1935-05-07 | 249.62 |
| -67 | 2428423 | 1936-09-11 | 249.09 |
| -66 | 2428675 | 1937-05-21 | 248.67 |
| -64 | 2429175 | 1938-10-03 | 248.67 |
| -63 | 2429425 | 1939-06-10 | 249.05 |
| -61 | 2429915 | 1940-10-12 | 249.55 |
| -60 | 2430172 | 1941-06-26 | 249 |
| -58 | 2430664 | 1942-10-31 | 249 |
| -57 | 2430919 | 1943-07-13 | 249.65 |
| -56 | 2431170 | 1944-03-20 | 249.8 |
| -54 | 2431660 | 1945-07-23 | 249.7 |
| -53 | 2431920 | 1946-04-09 | 249.65 |
| -51 | 2432413 | 1947-08-15 | 249.86 |
| -50 | 2432670 | 1948-04-28 | 250 |
| -48 | 2433160 | 1949-08-31 | 250.45 |
| -47 | 2433416 | 1950-05-14 | 251.32 |
| -45 | 2433920 | 1951-09-30 | 251.28 |
| -44 | 2434160 | 1952-05-27 | 251.28 |
| -41 | 2434930 | 1954-07-06 | 251.13 |
| -35 | 2436440 | 1958-08-24 | 250.53 |
| -34 | 2436684 | 1959-04-25 | 251.53 |
| -32 | 2437187 | 1960-09-09 | 250.81 |
| -31 | 2437425 | 1961-05-05 | 249.34 |
| -29 | 2437928 | 1962-09-20 | 249.35 |
| -28 | 2438201 | 1963-06-20 | 249.49 |
| -19 | 2440420 | 1969-07-17 | 249.51 |
| -16 | 2441173 | 1971-08-09 | 249.32 |
| -13 | 2441925 | 1973-08-30 | 248.27 |
| -12 | 2442175 | 1974-05-07 | 247.91 |
| -10 | 2442667 | 1975-09-11 | 248.2 |
| -9 | 2442908 | 1976-05-09 | 247.73 |
| -7 | 2443400 | 1977-09-13 | 247.73 |
| -6 | 2443650 | 1978-05-21 | 247.75 |
| -4 | 2444148 | 1979-10-01 | 247.62 |
| -3 | 2444400 | 1980-06-09 | 248.35 |
| 0 | 2445150 | 1982-06-29 | 248.64 |
| 2 | 2445638 | 1983-10-30 | 247.95 |
| 3 | 2445880 | 1984-06-28 | 247 |
| 4 | 2446140 | 1985-03-15 | 245.65 |
| 5 | 2446380 | 1985-11-10 | 245.59 |
| 6 | 2446625 | 1986-07-13 | 247 |
| 8 | 2447110 | 1987-11-10 | 247 |
| 9 | 2447353 | 1988-07-10 | 246.31 |
| 10 | 2447610 | 1989-03-24 | 247.11 |
| 11 | 2447860 | 1989-11-29 | 248.64 |
| 12 | 2448112 | 1990-08-08 | 249.75 |
| 13 | 2448349 | 1991-04-02 | 249.94 |
| 15 | 2448857 | 1992-08-22 | 250.5 |
| 16 | 2449105 | 1993-04-27 | 250.5 |
| 17 | 2449354 | 1994-01-01 | 250.57 |
| 18 | 2449608 | 1994-09-12 | 250.8 |
| 19 | 2449870 | 1995-06-01 | 249.53 |
| 20 | 2450110 | 1996-01-27 | 248.99 |
| 21 | 2450360 | 1996-10-03 | 249.43 |
| 22 | 2450608 | 1997-06-08 | 248.69 |
| 24 | 2451097 | 1998-10-10 | 248.19 |
| 25 | 2451346 | 1999-06-16 | 248.75 |
| 26 | 2451607 | 2000-03-03 | 248.63 |
| 27 | 2451850 | 2000-11-01 | 249.07 |
| 28 | 2452101 | 2001-07-10 | 249.36 |
| 29 | 2452349 | 2002-03-15 | 249 |
| 30 | 2452597 | 2002-11-18 | 249.63 |
| 31 | 2452844 | 2003-07-23 | 250.14 |
| 32 | 2453090 | 2004-03-25 | 250.07 |
| 33 | 2453349 | 2004-12-09 | 250.69 |
| 34 | 2453603 | 2005-08-20 | 251.57 |
| 35 | 2453850 | 2006-04-24 | 251.57 |
| 37 | 2454351 | 2007-09-07 | 251.19 |
| 38 | 2454606 | 2008-05-19 | 250.44 |
| 39 | 2454860 | 2009-01-28 | 250.06 |
| 40 | 2455099 | 2009-09-24 | 250.59 |
| 41 | 2455359 | 2010-06-11 | 250.28 |
| 42 | 2455600 | 2011-02-07 | 249.79 |
| 43 | 2455854 | 2011-10-19 | 250.79 |
| 44 | 2456106 | 2012-06-27 | 251.43 |
| 45 | 2456355 | 2013-03-03 | 251.22 |
| 46 | 2456608 | 2013-11-11 | 251.08 |
| 47 | 2456862 | 2014-07-23 | 250.93 |
| 48 | 2457116 | 2015-04-03 | 251.28 |
| 49 | 2457360 | 2015-12-03 | 251.42 |
| 50 | 2457609 | 2016-08-08 | 250.92 |
| 51 | 2457864 | 2017-04-20 | 249.42 |
| 52 | 2458115 | 2017-12-27 | 249.21 |
| 53 | 2458368 | 2018-09-06 | 250.5 |
| 54 | 2458615 | 2019-05-11 | 250.65 |
| 55 | 2458855 | 2020-01-06 | 249.93 |
| 56 | 2459110 | 2020-09-17 | 249.18 |
| 57 | 2459366 | 2021-05-31 | 248.67 |
| 58 | 2459616 | 2022-02-05 | 251.19 |
| 59 | 2459862 | 2022-10-09 | 253.43 |
| 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. |