| E | O (JD) | O (dat) | Period |
| -95 | 2404100 | 1870-02-06 | 414.16 |
| -94 | 2404526 | 1871-04-08 | 414.24 |
| -93 | 2404937 | 1872-05-23 | 413.92 |
| -89 | 2406608 | 1876-12-19 | 412.82 |
| -88 | 2407010 | 1878-01-25 | 412.61 |
| -87 | 2407425 | 1879-03-16 | 412.27 |
| -86 | 2407835 | 1880-04-29 | 411.3 |
| -85 | 2408225 | 1881-05-24 | 411.8 |
| -81 | 2409891 | 1885-12-15 | 413 |
| -80 | 2410291 | 1887-01-19 | 412.09 |
| -79 | 2410714 | 1888-03-17 | 413.09 |
| -78 | 2411140 | 1889-05-17 | 414.16 |
| -76 | 2411968 | 1891-08-23 | 413.12 |
| -75 | 2412358 | 1892-09-16 | 412.13 |
| -74 | 2412790 | 1893-11-22 | 414.78 |
| -73 | 2413195 | 1895-01-01 | 415.79 |
| -72 | 2413597 | 1896-02-07 | 418.72 |
| -71 | 2414002 | 1897-03-18 | 422.67 |
| -68 | 2415318 | 1900-10-25 | 422.06 |
| -67 | 2415690 | 1901-11-01 | 424.17 |
| -66 | 2416173 | 1903-02-27 | 426.06 |
| -65 | 2416583 | 1904-04-12 | 424.75 |
| -64 | 2416999 | 1905-06-02 | 427.21 |
| -63 | 2417428 | 1906-08-05 | 427.43 |
| -62 | 2417840 | 1907-09-21 | 424.57 |
| -61 | 2418276 | 1908-11-30 | 425.86 |
| -60 | 2418713 | 1910-02-10 | 424.21 |
| -59 | 2419134 | 1911-04-07 | 424.29 |
| -58 | 2419566 | 1912-06-12 | 424.57 |
| -57 | 2419978 | 1913-07-29 | 421 |
| -56 | 2420388 | 1914-09-12 | 418.93 |
| -55 | 2420820 | 1915-11-18 | 417.07 |
| -54 | 2421240 | 1917-01-11 | 415.14 |
| -53 | 2421643 | 1918-02-18 | 416.79 |
| -52 | 2422069 | 1919-04-20 | 417.57 |
| -51 | 2422470 | 1920-05-25 | 416.07 |
| -50 | 2422886 | 1921-07-15 | 414.79 |
| -49 | 2423315 | 1922-09-17 | 412 |
| -48 | 2423739 | 1923-11-15 | 410.21 |
| -47 | 2424146 | 1924-12-26 | 411.93 |
| -46 | 2424544 | 1926-01-28 | 410.93 |
| -45 | 2424936 | 1927-02-24 | 406.64 |
| -44 | 2425346 | 1928-04-09 | 404.64 |
| -43 | 2425777 | 1929-06-14 | 404.64 |
| -42 | 2426177 | 1930-07-19 | 403.71 |
| -41 | 2426570 | 1931-08-16 | 403.57 |
| -40 | 2426980 | 1932-09-29 | 403.43 |
| -39 | 2427375 | 1933-10-29 | 404.43 |
| -38 | 2427757 | 1934-11-15 | 405.86 |
| -37 | 2428175 | 1936-01-07 | 405.36 |
| -36 | 2428596 | 1937-03-03 | 406.86 |
| -35 | 2429020 | 1938-05-01 | 410.5 |
| -34 | 2429409 | 1939-05-25 | 414.14 |
| -33 | 2429816 | 1940-07-05 | 414.71 |
| -32 | 2430235 | 1941-08-28 | 413.57 |
| -31 | 2430644 | 1942-10-11 | 416 |
| -30 | 2431086 | 1943-12-27 | 423 |
| -29 | 2431491 | 1945-02-04 | 426.93 |
| -28 | 2431915 | 1946-04-04 | 428.21 |
| -27 | 2432338 | 1947-06-01 | 429 |
| -26 | 2432809 | 1948-09-14 | 429.86 |
| -25 | 2433219 | 1949-10-29 | 432 |
| -24 | 2433655 | 1951-01-08 | 433.86 |
| -23 | 2434081 | 1952-03-09 | 432.71 |
| -22 | 2434514 | 1953-05-16 | 432.07 |
| -21 | 2434940 | 1954-07-16 | 435.57 |
| -20 | 2435387 | 1955-10-06 | 438.86 |
| -19 | 2435818 | 1956-12-10 | 440.57 |
| -18 | 2436259 | 1958-02-24 | 441.29 |
| -17 | 2436713 | 1959-05-24 | 442.79 |
| -16 | 2437167 | 1960-08-20 | 444.36 |
| -15 | 2437596 | 1961-10-23 | 444.36 |
| -14 | 2438036 | 1963-01-06 | 440.64 |
| -13 | 2438490 | 1964-04-04 | 436.07 |
| -12 | 2438936 | 1965-06-24 | 434.5 |
| -11 | 2439362 | 1966-08-24 | 431 |
| -10 | 2439779 | 1967-10-15 | 425.36 |
| -9 | 2440206 | 1968-12-15 | 422 |
| -8 | 2440640 | 1970-02-22 | 420.93 |
| -7 | 2441026 | 1971-03-15 | 421.29 |
| -6 | 2441455 | 1972-05-17 | 419.93 |
| -5 | 2441879 | 1973-07-15 | 417.29 |
| -4 | 2442312 | 1974-09-21 | 417.36 |
| -3 | 2442727 | 1975-11-10 | 417.29 |
| -2 | 2443137 | 1976-12-24 | 414.43 |
| -1 | 2443551 | 1978-02-11 | 411.71 |
| 0 | 2443958 | 1979-03-25 | 411 |
| 1 | 2444365 | 1980-05-05 | 411.07 |
| 2 | 2444771 | 1981-06-15 | 410.71 |
| 3 | 2445184 | 1982-08-02 | 411.79 |
| 4 | 2445609 | 1983-10-01 | 413.21 |
| 5 | 2446010 | 1984-11-05 | 415.07 |
| 6 | 2446428 | 1985-12-28 | 414.43 |
| 7 | 2446846 | 1987-02-19 | 413.57 |
| 8 | 2447262 | 1988-04-10 | 416.29 |
| 9 | 2447685 | 1989-06-07 | 417.93 |
| 10 | 2448072 | 1990-06-29 | 417.21 |
| 11 | 2448511 | 1991-09-11 | 417.29 |
| 12 | 2448936 | 1992-11-09 | 417.07 |
| 13 | 2449353 | 1993-12-31 | 421.57 |
| 14 | 2449762 | 1995-02-13 | 425.36 |
| 15 | 2450188 | 1996-04-14 | 424.29 |
| 16 | 2450598 | 1997-05-29 | 426.14 |
| 17 | 2451061 | 1998-09-04 | 428.86 |
| 18 | 2451477 | 1999-10-25 | 430.64 |
| 19 | 2451910 | 2000-12-31 | 432.93 |
| 20 | 2452345 | 2002-03-11 | 432.86 |
| 21 | 2452774 | 2003-05-14 | 432.21 |
| 22 | 2453205 | 2004-07-18 | 433.36 |
| 23 | 2453642 | 2005-09-28 | 432.64 |
| 24 | 2454077 | 2006-12-07 | 431.79 |
| 25 | 2454512 | 2008-02-15 | 431.21 |
| 26 | 2454942 | 2009-04-20 | 428.86 |
| 27 | 2455370 | 2010-06-22 | 426.57 |
| 28 | 2455794 | 2011-08-20 | 425.57 |
| 29 | 2456222 | 2012-10-21 | 424.43 |
| 30 | 2456629 | 2013-12-02 | 423.07 |
| 31 | 2457062 | 2015-02-08 | 421.21 |
| 32 | 2457485 | 2016-04-06 | 419.71 |
| 33 | 2457911 | 2017-06-06 | 420.64 |
| 34 | 2458324 | 2018-07-24 | 421.6 |
| 35 | 2458737 | 2019-09-10 | 419.69 |
| 36 | 2459155 | 2020-11-01 | 417.42 |
| 37 | 2459585 | 2022-01-05 | 415.7 |
| 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. |