| E | O (JD) | O (dat) | Period |
| -103 | 2398000 | 1853-05-26 | 435.43 |
| -101 | 2398883 | 1855-10-26 | 435.86 |
| -100 | 2399308 | 1856-12-24 | 434.75 |
| -99 | 2399759 | 1858-03-20 | 435.88 |
| -96 | 2401052 | 1861-10-03 | 436.44 |
| -95 | 2401487 | 1862-12-12 | 436.49 |
| -94 | 2401932 | 1864-03-01 | 437.15 |
| -93 | 2402342 | 1865-04-15 | 438.09 |
| -92 | 2402818 | 1866-08-04 | 438.08 |
| -91 | 2403251 | 1867-10-11 | 440.6 |
| -90 | 2403678 | 1868-12-11 | 439.68 |
| -89 | 2404137 | 1870-03-15 | 439.71 |
| -88 | 2404570 | 1871-05-22 | 439.45 |
| -87 | 2404995 | 1872-07-20 | 436.78 |
| -86 | 2405466 | 1873-11-03 | 436.15 |
| -85 | 2405863 | 1874-12-05 | 434.66 |
| -84 | 2406324 | 1876-03-10 | 433.13 |
| -83 | 2406751 | 1877-05-11 | 431.65 |
| -82 | 2407170 | 1878-07-04 | 430.79 |
| -81 | 2407609 | 1879-09-16 | 430.25 |
| -80 | 2408029 | 1880-11-09 | 433.93 |
| -79 | 2408471 | 1882-01-25 | 435.13 |
| -78 | 2408880 | 1883-03-10 | 436.46 |
| -75 | 2410185 | 1886-10-05 | 430.81 |
| -73 | 2411055 | 1889-02-21 | 427.91 |
| -70 | 2412419 | 1892-11-16 | 425.67 |
| -69 | 2412853 | 1894-01-24 | 423.99 |
| -68 | 2413285 | 1895-04-01 | 422.33 |
| -59 | 2416998 | 1905-06-01 | 419.97 |
| -58 | 2417404 | 1906-07-12 | 418.25 |
| -57 | 2417798 | 1907-08-10 | 416.53 |
| -56 | 2418238 | 1908-10-23 | 416.77 |
| -55 | 2418650 | 1909-12-09 | 417.29 |
| -53 | 2419504 | 1912-04-11 | 422.28 |
| -52 | 2419949 | 1913-06-30 | 423.03 |
| -51 | 2420385 | 1914-09-09 | 423.13 |
| -50 | 2420778 | 1915-10-07 | 420.61 |
| -49 | 2421172 | 1916-11-04 | 419.98 |
| -48 | 2421630 | 1918-02-05 | 418.91 |
| -47 | 2422038 | 1919-03-20 | 420.21 |
| -46 | 2422457 | 1920-05-12 | 423.87 |
| -45 | 2422847 | 1921-06-06 | 429.29 |
| -44 | 2423294 | 1922-08-27 | 432.11 |
| -43 | 2423722 | 1923-10-29 | 433.13 |
| -42 | 2424179 | 1925-01-28 | 434.41 |
| -41 | 2424632 | 1926-04-26 | 437.01 |
| -40 | 2425084 | 1927-07-22 | 437.69 |
| -39 | 2425495 | 1928-09-05 | 437.64 |
| -38 | 2425926 | 1929-11-10 | 437.69 |
| -37 | 2426333 | 1930-12-22 | 437.47 |
| -36 | 2426813 | 1932-04-15 | 437.44 |
| -35 | 2427223 | 1933-05-30 | 439.1 |
| -34 | 2427692 | 1934-09-11 | 442.91 |
| -33 | 2428127 | 1935-11-20 | 444.1 |
| -32 | 2428574 | 1937-02-09 | 446.2 |
| -31 | 2429000 | 1938-04-11 | 445.38 |
| -30 | 2429458 | 1939-07-13 | 445.77 |
| -29 | 2429928 | 1940-10-25 | 444.48 |
| -28 | 2430346 | 1941-12-17 | 444.51 |
| -27 | 2430819 | 1943-04-04 | 444.21 |
| -26 | 2431245 | 1944-06-03 | 443.73 |
| -25 | 2431678 | 1945-08-10 | 442.46 |
| -24 | 2432122 | 1946-10-28 | 441.75 |
| -23 | 2432568 | 1948-01-17 | 442.96 |
| -22 | 2433014 | 1949-04-07 | 439.78 |
| -21 | 2433451 | 1950-06-18 | 439.55 |
| -20 | 2433898 | 1951-09-08 | 438.38 |
| -19 | 2434340 | 1952-11-23 | 437.26 |
| -18 | 2434795 | 1954-02-21 | 436.18 |
| -17 | 2435170 | 1955-03-03 | 435.11 |
| -16 | 2435632 | 1956-06-07 | 434.34 |
| -15 | 2436063 | 1957-08-12 | 432.5 |
| -14 | 2436508 | 1958-10-31 | 431.3 |
| -13 | 2436942 | 1960-01-08 | 429.98 |
| -12 | 2437371 | 1961-03-12 | 430.81 |
| -11 | 2437803 | 1962-05-18 | 428.46 |
| -10 | 2438213 | 1963-07-02 | 427.76 |
| -9 | 2438643 | 1964-09-04 | 426.33 |
| -8 | 2439059 | 1965-10-25 | 426.86 |
| -7 | 2439504 | 1967-01-13 | 427.67 |
| -6 | 2439926 | 1968-03-10 | 429.45 |
| -5 | 2440359 | 1969-05-17 | 431.58 |
| -4 | 2440771 | 1970-07-03 | 432.4 |
| -3 | 2441222 | 1971-09-27 | 434.54 |
| -2 | 2441650 | 1972-11-28 | 433.89 |
| -1 | 2442098 | 1974-02-19 | 433.87 |
| 0 | 2442533 | 1975-04-30 | 433.45 |
| 1 | 2442958 | 1976-06-28 | 433.2 |
| 2 | 2443420 | 1977-10-03 | 431.56 |
| 3 | 2443815 | 1978-11-02 | 431.08 |
| 4 | 2444246 | 1980-01-07 | 430.44 |
| 5 | 2444679 | 1981-03-15 | 431.16 |
| 6 | 2445114 | 1982-05-24 | 432.54 |
| 7 | 2445540 | 1983-07-24 | 433.75 |
| 8 | 2445978 | 1984-10-04 | 436.35 |
| 9 | 2446412 | 1985-12-12 | 437.79 |
| 10 | 2446857 | 1987-03-02 | 439.1 |
| 11 | 2447301 | 1988-05-19 | 439.2 |
| 12 | 2447741 | 1989-08-02 | 440.38 |
| 13 | 2448174 | 1990-10-09 | 441.26 |
| 14 | 2448625 | 1992-01-03 | 441.93 |
| 15 | 2449067 | 1993-03-20 | 440.72 |
| 16 | 2449485 | 1994-05-12 | 439.09 |
| 17 | 2449948 | 1995-08-18 | 438 |
| 18 | 2450397 | 1996-11-09 | 437.88 |
| 19 | 2450838 | 1998-01-24 | 437.98 |
| 20 | 2451248 | 1999-03-10 | 438.85 |
| 21 | 2451672 | 2000-05-07 | 439.58 |
| 22 | 2452114 | 2001-07-23 | 439.63 |
| 23 | 2452570 | 2002-10-22 | 441.42 |
| 24 | 2453021 | 2004-01-16 | 444.25 |
| 25 | 2453466 | 2005-04-05 | 446.05 |
| 26 | 2453901 | 2006-06-14 | 447.28 |
| 27 | 2454351 | 2007-09-07 | 447.32 |
| 28 | 2454807 | 2008-12-06 | 446.31 |
| 29 | 2455263 | 2010-03-07 | 445.71 |
| 30 | 2455684 | 2011-05-02 | 444.85 |
| 31 | 2456149 | 2012-08-09 | 442.76 |
| 32 | 2456594 | 2013-10-28 | 440.71 |
| 33 | 2457025 | 2015-01-02 | 438.47 |
| 34 | 2457469 | 2016-03-21 | 436.66 |
| 35 | 2457902 | 2017-05-28 | 436.18 |
| 36 | 2458317 | 2018-07-17 | 434.02 |
| 37 | 2458766 | 2019-10-09 | 433.1 |
| 38 | 2459195 | 2020-12-11 | 432.82 |
| 39 | 2459626 | 2022-02-15 | 431.8 |
| 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. |