| E | O (JD) | O (dat) | Period |
| -89 | 2404570 | 1871-05-22 | 439.64 |
| -88 | 2404987 | 1872-07-12 | 439.69 |
| -87 | 2405435 | 1873-10-03 | 441.87 |
| -86 | 2405873 | 1874-12-15 | 441.9 |
| -84 | 2406755 | 1877-05-15 | 441.12 |
| -83 | 2407195 | 1878-07-29 | 440.38 |
| -82 | 2407653 | 1879-10-30 | 441.75 |
| -81 | 2408096 | 1881-01-15 | 442 |
| -80 | 2408519 | 1882-03-14 | 444.06 |
| -79 | 2408949 | 1883-05-18 | 446.12 |
| -78 | 2409427 | 1884-09-07 | 443.69 |
| -77 | 2409831 | 1885-10-16 | 443.94 |
| -75 | 2410780 | 1888-05-22 | 445.19 |
| -74 | 2411206 | 1889-07-22 | 443.56 |
| -73 | 2411642 | 1890-10-01 | 443.75 |
| -72 | 2412076 | 1891-12-09 | 442.8 |
| -71 | 2412515 | 1893-02-20 | 438.43 |
| -70 | 2412958 | 1894-05-09 | 441.29 |
| -69 | 2413400 | 1895-07-25 | 444.29 |
| -68 | 2413853 | 1896-10-20 | 444.14 |
| -67 | 2414271 | 1897-12-12 | 443.29 |
| -66 | 2414755 | 1899-04-10 | 440.79 |
| -65 | 2415183 | 1900-06-12 | 439.43 |
| -64 | 2415626 | 1901-08-29 | 442.36 |
| -63 | 2416053 | 1902-10-30 | 442.36 |
| -62 | 2416476 | 1903-12-27 | 440.85 |
| -61 | 2416929 | 1905-03-24 | 442.71 |
| -60 | 2417388 | 1906-06-26 | 447.29 |
| -59 | 2417831 | 1907-09-12 | 452.78 |
| -58 | 2418279 | 1908-12-03 | 454.28 |
| -57 | 2418728 | 1910-02-25 | 454.43 |
| -56 | 2419213 | 1911-06-25 | 451.86 |
| -55 | 2419655 | 1912-09-09 | 450.36 |
| -54 | 2420110 | 1913-12-08 | 451.29 |
| -53 | 2420569 | 1915-03-12 | 448.5 |
| -52 | 2420976 | 1916-04-22 | 445.86 |
| -51 | 2421439 | 1917-07-29 | 445.79 |
| -50 | 2421886 | 1918-10-19 | 444.93 |
| -49 | 2422334 | 1920-01-10 | 446.43 |
| -48 | 2422776 | 1921-03-27 | 447.93 |
| -47 | 2423230 | 1922-06-24 | 447.43 |
| -46 | 2423678 | 1923-09-15 | 447.14 |
| -45 | 2424117 | 1924-11-27 | 446.72 |
| -44 | 2424569 | 1926-02-22 | 446.14 |
| -43 | 2425020 | 1927-05-19 | 445.43 |
| -42 | 2425460 | 1928-08-01 | 445.92 |
| -41 | 2425904 | 1929-10-19 | 446.21 |
| -40 | 2426348 | 1931-01-06 | 446.43 |
| -39 | 2426796 | 1932-03-29 | 447.57 |
| -38 | 2427242 | 1933-06-18 | 447.49 |
| -37 | 2427691 | 1934-09-10 | 446 |
| -36 | 2428148 | 1935-12-11 | 444.22 |
| -35 | 2428598 | 1937-03-05 | 442.57 |
| -34 | 2429031 | 1938-05-12 | 441.57 |
| -33 | 2429465 | 1939-07-20 | 439.79 |
| -32 | 2429898 | 1940-09-25 | 436.93 |
| -31 | 2430336 | 1941-12-07 | 435.86 |
| -30 | 2430779 | 1943-02-23 | 436.72 |
| -29 | 2431217 | 1944-05-06 | 437.92 |
| -28 | 2431646 | 1945-07-09 | 438.85 |
| -27 | 2432085 | 1946-09-21 | 439.36 |
| -26 | 2432525 | 1947-12-05 | 439.72 |
| -25 | 2432969 | 1949-02-21 | 441.64 |
| -24 | 2433409 | 1950-05-07 | 443.72 |
| -23 | 2433857 | 1951-07-29 | 444.43 |
| -22 | 2434295 | 1952-10-09 | 445.36 |
| -21 | 2434751 | 1954-01-08 | 446.22 |
| -20 | 2435192 | 1955-03-25 | 447.93 |
| -19 | 2435640 | 1956-06-15 | 450.79 |
| -18 | 2436089 | 1957-09-07 | 450.72 |
| -17 | 2436536 | 1958-11-28 | 449.5 |
| -16 | 2437001 | 1960-03-07 | 450.07 |
| -15 | 2437462 | 1961-06-11 | 449.43 |
| -14 | 2437894 | 1962-08-17 | 448.86 |
| -13 | 2438342 | 1963-11-08 | 447.43 |
| -12 | 2438791 | 1965-01-30 | 445.28 |
| -11 | 2439230 | 1966-04-14 | 446.21 |
| -10 | 2439679 | 1967-07-07 | 447.79 |
| -9 | 2440122 | 1968-09-22 | 447.14 |
| -8 | 2440575 | 1969-12-19 | 447.92 |
| -7 | 2441028 | 1971-03-17 | 449.14 |
| -6 | 2441477 | 1972-06-08 | 449.36 |
| -5 | 2441916 | 1973-08-21 | 449.22 |
| -4 | 2442376 | 1974-11-24 | 447.64 |
| -3 | 2442821 | 1976-02-12 | 446.64 |
| -2 | 2443271 | 1977-05-07 | 448 |
| -1 | 2443715 | 1978-07-25 | 447.93 |
| 0 | 2444155 | 1979-10-08 | 446.29 |
| 1 | 2444603 | 1980-12-29 | 444.93 |
| 2 | 2445062 | 1982-04-02 | 443.29 |
| 3 | 2445501 | 1983-06-15 | 442.79 |
| 4 | 2445944 | 1984-08-31 | 442 |
| 5 | 2446377 | 1985-11-07 | 440.5 |
| 6 | 2446815 | 1987-01-19 | 439.93 |
| 7 | 2447254 | 1988-04-02 | 440.14 |
| 8 | 2447692 | 1989-06-14 | 439.99 |
| 9 | 2448140 | 1990-09-05 | 438.49 |
| 10 | 2448582 | 1991-11-21 | 438.93 |
| 11 | 2449025 | 1993-02-06 | 439.57 |
| 12 | 2449456 | 1994-04-13 | 437.49 |
| 13 | 2449875 | 1995-06-06 | 436.36 |
| 14 | 2450339 | 1996-09-12 | 436.64 |
| 15 | 2450761 | 1997-11-08 | 437.72 |
| 16 | 2451196 | 1999-01-17 | 439.72 |
| 17 | 2451635 | 2000-03-31 | 438.22 |
| 18 | 2452085 | 2001-06-24 | 437.86 |
| 19 | 2452524 | 2002-09-06 | 440.43 |
| 20 | 2452963 | 2003-11-19 | 440.79 |
| 21 | 2453386 | 2005-01-15 | 442.57 |
| 22 | 2453844 | 2006-04-18 | 439.71 |
| 23 | 2454279 | 2007-06-27 | 440.64 |
| 24 | 2454723 | 2008-09-13 | 445.57 |
| 25 | 2455193 | 2009-12-27 | 442.93 |
| 26 | 2455572 | 2011-01-10 | 443.07 |
| 27 | 2456084 | 2012-06-05 | 444.86 |
| 28 | 2456503 | 2013-07-29 | 441.79 |
| 29 | 2456928 | 2014-09-27 | 443.5 |
| 30 | 2457398 | 2016-01-10 | 442.79 |
| 31 | 2457832 | 2017-03-19 | 440.93 |
| 32 | 2458269 | 2018-05-30 | 445.05 |
| 33 | 2458705 | 2019-08-09 | 442.92 |
| 34 | 2459150 | 2020-10-27 | 439.5 |
| 35 | 2459610 | 2022-01-30 | 440.59 |
| 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. |