| E | O (JD) | O (dat) | Period |
| -118 | 2407202 | 1878-08-05 | 386.33 |
| -101 | 2413657 | 1896-04-07 | 385.5 |
| -99 | 2414455 | 1898-06-14 | 383.89 |
| -98 | 2414849 | 1899-07-13 | 382.65 |
| -97 | 2415245 | 1900-08-13 | 384.11 |
| -94 | 2416390 | 1903-10-02 | 386.89 |
| -93 | 2416760 | 1904-10-06 | 384.61 |
| -92 | 2417149 | 1905-10-30 | 382.89 |
| -91 | 2417538 | 1906-11-23 | 382.05 |
| -90 | 2417925 | 1907-12-15 | 381.36 |
| -89 | 2418302 | 1908-12-26 | 381.32 |
| -88 | 2418684 | 1910-01-12 | 381.23 |
| -83 | 2420592 | 1915-04-04 | 380.23 |
| -82 | 2420948 | 1916-03-25 | 380.23 |
| -81 | 2421350 | 1917-05-01 | 381.39 |
| -80 | 2421724 | 1918-05-10 | 381.9 |
| -79 | 2422104 | 1919-05-25 | 383.88 |
| -78 | 2422488 | 1920-06-12 | 384.57 |
| -76 | 2423270 | 1922-08-03 | 383 |
| -75 | 2423644 | 1923-08-12 | 382.56 |
| -74 | 2424038 | 1924-09-09 | 382.06 |
| -73 | 2424413 | 1925-09-19 | 380.07 |
| -72 | 2424789 | 1926-09-30 | 378.08 |
| -71 | 2425160 | 1927-10-06 | 377.35 |
| -70 | 2425545 | 1928-10-25 | 377.5 |
| -69 | 2425914 | 1929-10-29 | 378.43 |
| -68 | 2426293 | 1930-11-12 | 380.08 |
| -67 | 2426672 | 1931-11-26 | 380.72 |
| -66 | 2427064 | 1932-12-22 | 380.85 |
| -65 | 2427436 | 1933-12-29 | 381.21 |
| -64 | 2427834 | 1935-01-31 | 381.21 |
| -63 | 2428201 | 1936-02-02 | 382.5 |
| -62 | 2428590 | 1937-02-25 | 383.86 |
| -61 | 2428954 | 1938-02-24 | 383.28 |
| -60 | 2429348 | 1939-03-25 | 381.71 |
| -59 | 2429743 | 1940-04-23 | 381.28 |
| -58 | 2430131 | 1941-05-16 | 381.86 |
| -57 | 2430505 | 1942-05-25 | 382.5 |
| -56 | 2430874 | 1943-05-29 | 381.28 |
| -55 | 2431255 | 1944-06-13 | 380 |
| -54 | 2431635 | 1945-06-28 | 379.93 |
| -53 | 2432022 | 1946-07-20 | 381.43 |
| -52 | 2432407 | 1947-08-09 | 382.58 |
| -51 | 2432787 | 1948-08-23 | 382.57 |
| -50 | 2433168 | 1949-09-08 | 381.93 |
| -49 | 2433551 | 1950-09-26 | 380.78 |
| -48 | 2433934 | 1951-10-14 | 380.29 |
| -47 | 2434312 | 1952-10-26 | 380.29 |
| -46 | 2434692 | 1953-11-10 | 380.07 |
| -45 | 2435068 | 1954-11-21 | 379.28 |
| -44 | 2435450 | 1955-12-08 | 379.07 |
| -43 | 2435829 | 1956-12-21 | 378.65 |
| -42 | 2436211 | 1958-01-07 | 378.36 |
| -41 | 2436584 | 1959-01-15 | 381.14 |
| -40 | 2436969 | 1960-02-04 | 383.14 |
| -39 | 2437336 | 1961-02-05 | 383.35 |
| -38 | 2437721 | 1962-02-25 | 384.15 |
| -37 | 2438133 | 1963-04-13 | 385.15 |
| -36 | 2438510 | 1964-04-24 | 386.78 |
| -35 | 2438897 | 1965-05-16 | 389 |
| -34 | 2439276 | 1966-05-30 | 387.64 |
| -33 | 2439669 | 1967-06-27 | 386 |
| -32 | 2440051 | 1968-07-13 | 386.58 |
| -31 | 2440452 | 1969-08-18 | 386.5 |
| -30 | 2440829 | 1970-08-30 | 386.71 |
| -29 | 2441218 | 1971-09-23 | 386.64 |
| -28 | 2441601 | 1972-10-10 | 384.93 |
| -27 | 2441983 | 1973-10-27 | 384.15 |
| -26 | 2442376 | 1974-11-24 | 383.43 |
| -25 | 2442757 | 1975-12-10 | 380.93 |
| -24 | 2443135 | 1976-12-22 | 380.5 |
| -23 | 2443524 | 1978-01-15 | 378.86 |
| -22 | 2443891 | 1979-01-17 | 376.65 |
| -21 | 2444261 | 1980-01-22 | 376.93 |
| -20 | 2444650 | 1981-02-14 | 376.78 |
| -19 | 2445013 | 1982-02-12 | 376.5 |
| -18 | 2445393 | 1983-02-27 | 377.58 |
| -17 | 2445776 | 1984-03-16 | 378.08 |
| -16 | 2446158 | 1985-04-02 | 378 |
| -15 | 2446528 | 1986-04-07 | 378 |
| -14 | 2446910 | 1987-04-24 | 378.07 |
| -13 | 2447294 | 1988-05-12 | 378 |
| -12 | 2447661 | 1989-05-14 | 378.22 |
| -11 | 2448037 | 1990-05-25 | 378.93 |
| -10 | 2448425 | 1991-06-17 | 378.71 |
| -9 | 2448801 | 1992-06-27 | 380 |
| -8 | 2449180 | 1993-07-11 | 381.72 |
| -7 | 2449563 | 1994-07-29 | 381.58 |
| -6 | 2449943 | 1995-08-13 | 381.64 |
| -5 | 2450332 | 1996-09-05 | 382.71 |
| -4 | 2450710 | 1997-09-18 | 383.21 |
| -3 | 2451094 | 1998-10-07 | 383.79 |
| -2 | 2451475 | 1999-10-23 | 384.29 |
| -1 | 2451864 | 2000-11-15 | 384.14 |
| 0 | 2452244 | 2001-11-30 | 384.35 |
| 1 | 2452635 | 2002-12-26 | 384.64 |
| 2 | 2453020 | 2004-01-15 | 384.58 |
| 3 | 2453400 | 2005-01-29 | 384.29 |
| 4 | 2453785 | 2006-02-18 | 383.57 |
| 5 | 2454169 | 2007-03-09 | 383.78 |
| 6 | 2454554 | 2008-03-28 | 384.78 |
| 7 | 2454934 | 2009-04-12 | 384.86 |
| 8 | 2455315 | 2010-04-28 | 384.5 |
| 9 | 2455713 | 2011-05-31 | 384.5 |
| 10 | 2456094 | 2012-06-15 | 384.71 |
| 11 | 2456479 | 2013-07-05 | 384.64 |
| 12 | 2456858 | 2014-07-19 | 383.43 |
| 13 | 2457248 | 2015-08-13 | 382.08 |
| 14 | 2457626 | 2016-08-25 | 382.14 |
| 15 | 2458008 | 2017-09-11 | 381.14 |
| 16 | 2458388 | 2018-09-26 | 379.35 |
| 17 | 2458768 | 2019-10-11 | 379.14 |
| 18 | 2459155 | 2020-11-01 | 379.61 |
| 19 | 2459518 | 2021-10-30 | 378.99 |
| 20 | 2459899 | 2022-11-15 | 378.78 |
| 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. |