| E | O (JD) | O (dat) | Period |
| -131 | 2400163 | 1859-04-28 | 404.82 |
| -129 | 2400959 | 1861-07-02 | 405.68 |
| -125 | 2402601 | 1865-12-30 | 406.71 |
| -124 | 2402999 | 1867-02-01 | 407.24 |
| -123 | 2403401 | 1868-03-09 | 407.86 |
| -122 | 2403814 | 1869-04-26 | 406.53 |
| -121 | 2404221 | 1870-06-07 | 406.29 |
| -120 | 2404645 | 1871-08-05 | 409.12 |
| -119 | 2405042 | 1872-09-05 | 411.61 |
| -118 | 2405429 | 1873-09-27 | 412.61 |
| -117 | 2405859 | 1874-12-01 | 410.5 |
| -114 | 2407087 | 1878-04-12 | 410.83 |
| -113 | 2407537 | 1879-07-06 | 413.11 |
| -112 | 2407925 | 1880-07-28 | 412.39 |
| -111 | 2408330 | 1881-09-06 | 410 |
| -110 | 2408752 | 1882-11-02 | 408.53 |
| -109 | 2409155 | 1883-12-10 | 411.25 |
| -108 | 2409556 | 1885-01-14 | 413.37 |
| -107 | 2409950 | 1886-02-12 | 413.38 |
| -105 | 2410802 | 1888-06-13 | 414.56 |
| -104 | 2411240 | 1889-08-25 | 415.75 |
| -103 | 2411629 | 1890-09-18 | 417.19 |
| -102 | 2412067 | 1891-11-30 | 417 |
| -101 | 2412473 | 1893-01-09 | 414.64 |
| -100 | 2412890 | 1894-03-02 | 411.4 |
| -99 | 2413291 | 1895-04-07 | 407.87 |
| -98 | 2413716 | 1896-06-05 | 406.31 |
| -97 | 2414131 | 1897-07-25 | 405.31 |
| -95 | 2414909 | 1899-09-11 | 404.12 |
| -94 | 2415313 | 1900-10-20 | 403.75 |
| -93 | 2415728 | 1901-12-09 | 401.44 |
| -92 | 2416120 | 1903-01-05 | 403.47 |
| -91 | 2416527 | 1904-02-16 | 407.21 |
| -90 | 2416940 | 1905-04-04 | 406.07 |
| -89 | 2417330 | 1906-04-29 | 407.57 |
| -88 | 2417762 | 1907-07-05 | 410.36 |
| -87 | 2418161 | 1908-08-07 | 409.86 |
| -86 | 2418565 | 1909-09-15 | 410.57 |
| -85 | 2418989 | 1910-11-13 | 409.93 |
| -84 | 2419403 | 1912-01-01 | 409.57 |
| -83 | 2419802 | 1913-02-03 | 410.5 |
| -82 | 2420216 | 1914-03-24 | 409 |
| -81 | 2420615 | 1915-04-27 | 408.14 |
| -80 | 2421042 | 1916-06-27 | 409.29 |
| -79 | 2421431 | 1917-07-21 | 408.43 |
| -78 | 2421849 | 1918-09-12 | 408 |
| -77 | 2422257 | 1919-10-25 | 407.86 |
| -76 | 2422678 | 1920-12-19 | 408.5 |
| -75 | 2423058 | 1922-01-03 | 408.86 |
| -74 | 2423485 | 1923-03-06 | 407.86 |
| -73 | 2423882 | 1924-04-06 | 407.79 |
| -72 | 2424310 | 1925-06-08 | 409.21 |
| -71 | 2424694 | 1926-06-27 | 409.43 |
| -70 | 2425122 | 1927-08-29 | 407.5 |
| -69 | 2425522 | 1928-10-02 | 406.71 |
| -68 | 2425943 | 1929-11-27 | 408.07 |
| -67 | 2426332 | 1930-12-21 | 409.93 |
| -66 | 2426740 | 1932-02-02 | 410.29 |
| -65 | 2427146 | 1933-03-14 | 410.64 |
| -64 | 2427571 | 1934-05-13 | 412.14 |
| -63 | 2427984 | 1935-06-30 | 413.5 |
| -62 | 2428404 | 1936-08-23 | 413.86 |
| -61 | 2428810 | 1937-10-03 | 413.86 |
| -60 | 2429235 | 1938-12-02 | 411.71 |
| -59 | 2429626 | 1939-12-28 | 411.93 |
| -58 | 2430054 | 1941-02-28 | 412.93 |
| -57 | 2430457 | 1942-04-07 | 413.5 |
| -56 | 2430862 | 1943-05-17 | 413.43 |
| -55 | 2431293 | 1944-07-21 | 412.5 |
| -54 | 2431702 | 1945-09-03 | 412.93 |
| -53 | 2432132 | 1946-11-07 | 413.29 |
| -52 | 2432517 | 1947-11-27 | 410.5 |
| -51 | 2432938 | 1949-01-21 | 408.64 |
| -50 | 2433354 | 1950-03-13 | 405.86 |
| -49 | 2433751 | 1951-04-14 | 405.43 |
| -48 | 2434151 | 1952-05-18 | 405.14 |
| -47 | 2434565 | 1953-07-06 | 401.5 |
| -46 | 2434951 | 1954-07-27 | 401.57 |
| -45 | 2435374 | 1955-09-23 | 401.86 |
| -44 | 2435753 | 1956-10-06 | 401.57 |
| -43 | 2436160 | 1957-11-17 | 402.79 |
| -42 | 2436567 | 1958-12-29 | 402.93 |
| -41 | 2436961 | 1960-01-27 | 404.21 |
| -40 | 2437377 | 1961-03-18 | 406.57 |
| -39 | 2437778 | 1962-04-23 | 406.43 |
| -38 | 2438188 | 1963-06-07 | 407.79 |
| -37 | 2438598 | 1964-07-21 | 408.93 |
| -36 | 2439007 | 1965-09-03 | 409.71 |
| -35 | 2439410 | 1966-10-11 | 410.07 |
| -34 | 2439827 | 1967-12-02 | 409.86 |
| -33 | 2440236 | 1969-01-14 | 411.07 |
| -32 | 2440655 | 1970-03-09 | 413.29 |
| -31 | 2441052 | 1971-04-10 | 413.57 |
| -30 | 2441472 | 1972-06-03 | 413.5 |
| -29 | 2441888 | 1973-07-24 | 415.36 |
| -28 | 2442315 | 1974-09-24 | 417.07 |
| -27 | 2442712 | 1975-10-26 | 417.43 |
| -26 | 2443140 | 1976-12-27 | 416.86 |
| -25 | 2443566 | 1978-02-26 | 415.93 |
| -24 | 2443980 | 1979-04-16 | 416.29 |
| -23 | 2444388 | 1980-05-28 | 417.5 |
| -22 | 2444808 | 1981-07-22 | 415.21 |
| -21 | 2445218 | 1982-09-05 | 413.21 |
| -20 | 2445637 | 1983-10-29 | 412.07 |
| -19 | 2446060 | 1984-12-25 | 411.07 |
| -18 | 2446459 | 1986-01-28 | 410.71 |
| -17 | 2446872 | 1987-03-17 | 410.36 |
| -16 | 2447265 | 1988-04-13 | 409.71 |
| -15 | 2447686 | 1989-06-08 | 408.14 |
| -14 | 2448090 | 1990-07-17 | 408.36 |
| -13 | 2448510 | 1991-09-10 | 408.86 |
| -12 | 2448923 | 1992-10-27 | 408.71 |
| -11 | 2449310 | 1993-11-18 | 409.07 |
| -10 | 2449738 | 1995-01-20 | 408.64 |
| -9 | 2450123 | 1996-02-09 | 407.29 |
| -8 | 2450550 | 1997-04-11 | 409 |
| -7 | 2450953 | 1998-05-19 | 410.29 |
| -6 | 2451368 | 1999-07-08 | 410.71 |
| -5 | 2451767 | 2000-08-10 | 411.86 |
| -4 | 2452192 | 2001-10-09 | 410.71 |
| -3 | 2452600 | 2002-11-21 | 411.14 |
| -2 | 2453011 | 2004-01-06 | 412.07 |
| -1 | 2453428 | 2005-02-26 | 411.29 |
| 0 | 2453825 | 2006-03-30 | 411.07 |
| 1 | 2454252 | 2007-05-31 | 411.93 |
| 2 | 2454652 | 2008-07-04 | 408.64 |
| 3 | 2455065 | 2009-08-21 | 407.21 |
| 4 | 2455482 | 2010-10-12 | 408.36 |
| 5 | 2455896 | 2011-11-30 | 407.86 |
| 6 | 2456264 | 2012-12-02 | 407.5 |
| 7 | 2456690 | 2014-02-01 | 406.57 |
| 8 | 2457104 | 2015-03-22 | 406 |
| 9 | 2457510 | 2016-05-01 | 407.86 |
| 10 | 2457912 | 2017-06-07 | 410.57 |
| 11 | 2458327 | 2018-07-27 | 409.9 |
| 12 | 2458735 | 2019-09-08 | 408.06 |
| 13 | 2459135 | 2020-10-12 | 410 |
| 14 | 2459567 | 2021-12-18 | 411.6 |
| 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. |