| E | O (JD) | O (dat) | Period |
| -70 | 2416714 | 1904-08-21 | 381.03 |
| -68 | 2417480 | 1906-09-26 | 381.41 |
| -67 | 2417859 | 1907-10-10 | 381.7 |
| -66 | 2418223 | 1908-10-08 | 380.85 |
| -65 | 2418621 | 1909-11-10 | 381.2 |
| -64 | 2419005 | 1910-11-29 | 381.81 |
| -63 | 2419385 | 1911-12-14 | 382.01 |
| -62 | 2419768 | 1912-12-31 | 382.48 |
| -61 | 2420133 | 1913-12-31 | 382.55 |
| -60 | 2420530 | 1915-02-01 | 382.62 |
| -59 | 2420921 | 1916-02-27 | 383.55 |
| -58 | 2421293 | 1917-03-05 | 384.94 |
| -57 | 2421678 | 1918-03-25 | 386.89 |
| -56 | 2422054 | 1919-04-05 | 388.82 |
| -55 | 2422456 | 1920-05-11 | 389.66 |
| -54 | 2422844 | 1921-06-03 | 390.94 |
| -53 | 2423238 | 1922-07-02 | 392 |
| -52 | 2423641 | 1923-08-09 | 392.16 |
| -51 | 2424032 | 1924-09-03 | 391.85 |
| -50 | 2424423 | 1925-09-29 | 390.18 |
| -49 | 2424814 | 1926-10-25 | 388.98 |
| -48 | 2425197 | 1927-11-12 | 387.53 |
| -47 | 2425586 | 1928-12-05 | 385.76 |
| -46 | 2425972 | 1929-12-26 | 384.85 |
| -45 | 2426350 | 1931-01-08 | 383.85 |
| -44 | 2426737 | 1932-01-30 | 383.05 |
| -43 | 2427122 | 1933-02-18 | 382.96 |
| -42 | 2427498 | 1934-03-01 | 382.04 |
| -41 | 2427885 | 1935-03-23 | 380.97 |
| -40 | 2428263 | 1936-04-04 | 380 |
| -39 | 2428644 | 1937-04-20 | 378.95 |
| -38 | 2429035 | 1938-05-16 | 378.31 |
| -37 | 2429401 | 1939-05-17 | 378.11 |
| -36 | 2429772 | 1940-05-22 | 377.85 |
| -35 | 2430148 | 1941-06-02 | 378.25 |
| -34 | 2430528 | 1942-06-17 | 378.64 |
| -33 | 2430908 | 1943-07-02 | 379.23 |
| -32 | 2431290 | 1944-07-18 | 380.7 |
| -31 | 2431671 | 1945-08-03 | 381.97 |
| -30 | 2432056 | 1946-08-23 | 382.19 |
| -29 | 2432436 | 1947-09-07 | 382.82 |
| -28 | 2432818 | 1948-09-23 | 383.66 |
| -27 | 2433203 | 1949-10-13 | 384.4 |
| -26 | 2433593 | 1950-11-07 | 385.04 |
| -25 | 2433963 | 1951-11-12 | 385.9 |
| -24 | 2434359 | 1952-12-12 | 387.05 |
| -23 | 2434750 | 1954-01-07 | 387.4 |
| -22 | 2435136 | 1955-01-28 | 387.28 |
| -21 | 2435521 | 1956-02-17 | 387.09 |
| -20 | 2435915 | 1957-03-17 | 386.09 |
| -19 | 2436308 | 1958-04-14 | 384.84 |
| -18 | 2436685 | 1959-04-26 | 384.11 |
| -17 | 2437066 | 1960-05-11 | 383.45 |
| -16 | 2437452 | 1961-06-01 | 382.47 |
| -15 | 2437816 | 1962-05-31 | 381.62 |
| -14 | 2438211 | 1963-06-30 | 381.25 |
| -13 | 2438597 | 1964-07-20 | 381.54 |
| -12 | 2438977 | 1965-08-04 | 382.09 |
| -11 | 2439352 | 1966-08-14 | 381.77 |
| -10 | 2439736 | 1967-09-02 | 382.55 |
| -9 | 2440117 | 1968-09-17 | 382.5 |
| -8 | 2440500 | 1969-10-05 | 383.08 |
| -7 | 2440892 | 1970-11-01 | 384.53 |
| -6 | 2441257 | 1971-11-01 | 386.03 |
| -5 | 2441656 | 1972-12-04 | 387.21 |
| -4 | 2442042 | 1973-12-25 | 388.28 |
| -3 | 2442427 | 1975-01-14 | 388.95 |
| -2 | 2442826 | 1976-02-17 | 389.2 |
| -1 | 2443217 | 1977-03-14 | 389.77 |
| 0 | 2443608 | 1978-04-09 | 388.63 |
| 1 | 2443996 | 1979-05-02 | 388.42 |
| 2 | 2444382 | 1980-05-22 | 387.5 |
| 3 | 2444766 | 1981-06-10 | 386.45 |
| 4 | 2445156 | 1982-07-05 | 386.29 |
| 5 | 2445533 | 1983-07-17 | 386.75 |
| 6 | 2445930 | 1984-08-17 | 386.56 |
| 7 | 2446306 | 1985-08-28 | 386.38 |
| 8 | 2446694 | 1986-09-20 | 385.86 |
| 9 | 2447088 | 1987-10-19 | 385.38 |
| 10 | 2447485 | 1988-11-19 | 385.05 |
| 11 | 2447855 | 1989-11-24 | 384.1 |
| 12 | 2448239 | 1990-12-13 | 383.72 |
| 13 | 2448617 | 1991-12-26 | 382.53 |
| 14 | 2449004 | 1993-01-16 | 381.37 |
| 15 | 2449387 | 1994-02-03 | 380.53 |
| 16 | 2449767 | 1995-02-18 | 381.18 |
| 17 | 2450150 | 1996-03-07 | 381.11 |
| 18 | 2450525 | 1997-03-17 | 381.05 |
| 19 | 2450904 | 1998-03-31 | 380.71 |
| 20 | 2451280 | 1999-04-11 | 380.72 |
| 21 | 2451675 | 2000-05-10 | 381.08 |
| 22 | 2452053 | 2001-05-23 | 381.25 |
| 23 | 2452432 | 2002-06-06 | 381.48 |
| 24 | 2452811 | 2003-06-20 | 381.79 |
| 25 | 2453193 | 2004-07-06 | 381.67 |
| 26 | 2453579 | 2005-07-27 | 381.35 |
| 27 | 2453957 | 2006-08-09 | 382.35 |
| 28 | 2454337 | 2007-08-24 | 383.44 |
| 29 | 2454726 | 2008-09-16 | 384.62 |
| 30 | 2455102 | 2009-09-27 | 385.33 |
| 31 | 2455486 | 2010-10-16 | 386.39 |
| 32 | 2455882 | 2011-11-16 | 387.72 |
| 33 | 2456272 | 2012-12-10 | 388.68 |
| 34 | 2456663 | 2014-01-05 | 389.65 |
| 35 | 2457044 | 2015-01-21 | 390.34 |
| 36 | 2457440 | 2016-02-21 | 390.07 |
| 37 | 2457832 | 2017-03-19 | 389.69 |
| 38 | 2458221 | 2018-04-12 | 389.7 |
| 39 | 2458618 | 2019-05-14 | 389.73 |
| 40 | 2459001 | 2020-05-31 | 389.94 |
| 41 | 2459384 | 2021-06-18 | 389.11 |
| 42 | 2459777 | 2022-07-16 | 388.49 |
| 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. |