| E | O (JD) | O (dat) | Period |
| -123 | 2398948 | 1855-12-30 | 378.66 |
| -122 | 2399330 | 1857-01-15 | 378.29 |
| -121 | 2399707 | 1858-01-27 | 378.44 |
| -120 | 2400081 | 1859-02-05 | 379.77 |
| -119 | 2400473 | 1860-03-03 | 380.11 |
| -118 | 2400838 | 1861-03-03 | 378.46 |
| -117 | 2401218 | 1862-03-18 | 376.72 |
| -116 | 2401600 | 1863-04-04 | 376.13 |
| -109 | 2404268 | 1870-07-24 | 375.69 |
| -108 | 2404651 | 1871-08-11 | 375.74 |
| -101 | 2407254 | 1878-09-26 | 375.43 |
| -99 | 2407959 | 1880-08-31 | 374.54 |
| -98 | 2408352 | 1881-09-28 | 374.01 |
| -96 | 2409104 | 1883-10-20 | 372.57 |
| -95 | 2409515 | 1884-12-04 | 372.87 |
| -94 | 2409853 | 1885-11-07 | 373.93 |
| -93 | 2410202 | 1886-10-22 | 374.58 |
| -89 | 2411738 | 1891-01-05 | 373.8 |
| -88 | 2412089 | 1891-12-22 | 372.84 |
| -87 | 2412473 | 1893-01-09 | 371.93 |
| -86 | 2412845 | 1894-01-16 | 372.53 |
| -85 | 2413219 | 1895-01-25 | 371.46 |
| -84 | 2413593 | 1896-02-03 | 368.46 |
| -83 | 2413944 | 1897-01-19 | 368.38 |
| -82 | 2414313 | 1898-01-23 | 367.43 |
| -81 | 2414681 | 1899-01-26 | 367.6 |
| -80 | 2415043 | 1900-01-23 | 368.17 |
| -79 | 2415424 | 1901-02-08 | 369.42 |
| -78 | 2415785 | 1902-02-04 | 371.66 |
| -77 | 2416154 | 1903-02-08 | 371.68 |
| -76 | 2416531 | 1904-02-20 | 372.6 |
| -75 | 2416905 | 1905-02-28 | 373.3 |
| -74 | 2417283 | 1906-03-13 | 373.42 |
| -73 | 2417669 | 1907-04-03 | 373.81 |
| -72 | 2418014 | 1908-03-13 | 373.62 |
| -71 | 2418405 | 1909-04-08 | 372.67 |
| -70 | 2418777 | 1910-04-15 | 372.79 |
| -69 | 2419149 | 1911-04-22 | 372.45 |
| -68 | 2419519 | 1912-04-26 | 371.2 |
| -67 | 2419892 | 1913-05-04 | 371.97 |
| -66 | 2420254 | 1914-05-01 | 370.9 |
| -65 | 2420645 | 1915-05-27 | 370.47 |
| -64 | 2421009 | 1916-05-25 | 370.39 |
| -63 | 2421356 | 1917-05-07 | 371.57 |
| -62 | 2421752 | 1918-06-07 | 371.23 |
| -61 | 2422114 | 1919-06-04 | 371.35 |
| -60 | 2422479 | 1920-06-03 | 371.49 |
| -59 | 2422855 | 1921-06-14 | 371.13 |
| -58 | 2423252 | 1922-07-16 | 371.44 |
| -57 | 2423595 | 1923-06-24 | 370.68 |
| -56 | 2423973 | 1924-07-06 | 370.15 |
| -55 | 2424355 | 1925-07-23 | 370.53 |
| -54 | 2424695 | 1926-06-28 | 370.81 |
| -53 | 2425083 | 1927-07-21 | 370.61 |
| -52 | 2425458 | 1928-07-30 | 372.18 |
| -51 | 2425808 | 1929-07-15 | 372.65 |
| -50 | 2426205 | 1930-08-16 | 373.59 |
| -49 | 2426583 | 1931-08-29 | 375.1 |
| -48 | 2426942 | 1932-08-22 | 375.04 |
| -47 | 2427322 | 1933-09-06 | 375.32 |
| -46 | 2427700 | 1934-09-19 | 375.82 |
| -45 | 2428078 | 1935-10-02 | 374.65 |
| -44 | 2428453 | 1936-10-11 | 374.39 |
| -43 | 2428830 | 1937-10-23 | 374.8 |
| -42 | 2429199 | 1938-10-27 | 374.15 |
| -41 | 2429577 | 1939-11-09 | 374.01 |
| -40 | 2429944 | 1940-11-10 | 373.71 |
| -39 | 2430315 | 1941-11-16 | 373.53 |
| -38 | 2430698 | 1942-12-04 | 373.45 |
| -37 | 2431067 | 1943-12-08 | 373.04 |
| -36 | 2431447 | 1944-12-22 | 372.59 |
| -35 | 2431815 | 1945-12-25 | 372.18 |
| -34 | 2432187 | 1947-01-01 | 371.72 |
| -33 | 2432561 | 1948-01-10 | 371.43 |
| -32 | 2432923 | 1949-01-06 | 371.26 |
| -31 | 2433298 | 1950-01-16 | 371.36 |
| -30 | 2433665 | 1951-01-18 | 372.36 |
| -29 | 2434041 | 1952-01-29 | 373.17 |
| -28 | 2434419 | 1953-02-10 | 374.73 |
| -27 | 2434783 | 1954-02-09 | 375.78 |
| -26 | 2435163 | 1955-02-24 | 376.81 |
| -25 | 2435546 | 1956-03-13 | 378.42 |
| -24 | 2435920 | 1957-03-22 | 379.35 |
| -23 | 2436311 | 1958-04-17 | 379.45 |
| -22 | 2436676 | 1959-04-17 | 379.33 |
| -21 | 2437064 | 1960-05-09 | 378.39 |
| -20 | 2437455 | 1961-06-04 | 376.37 |
| -19 | 2437831 | 1962-06-15 | 374.83 |
| -18 | 2438195 | 1963-06-14 | 373.09 |
| -17 | 2438567 | 1964-06-20 | 372.84 |
| -16 | 2438942 | 1965-06-30 | 371.76 |
| -15 | 2439294 | 1966-06-17 | 371.24 |
| -14 | 2439671 | 1967-06-29 | 371.66 |
| -13 | 2440043 | 1968-07-05 | 372.57 |
| -12 | 2440431 | 1969-07-28 | 373.21 |
| -11 | 2440799 | 1970-07-31 | 373.82 |
| -10 | 2441170 | 1971-08-06 | 375.05 |
| -9 | 2441543 | 1972-08-13 | 374.9 |
| -8 | 2441920 | 1973-08-25 | 375.02 |
| -7 | 2442295 | 1974-09-04 | 375.03 |
| -6 | 2442668 | 1975-09-12 | 375.39 |
| -5 | 2443052 | 1976-09-30 | 375.78 |
| -4 | 2443421 | 1977-10-04 | 376.6 |
| -3 | 2443800 | 1978-10-18 | 377.05 |
| -2 | 2444177 | 1979-10-30 | 377.95 |
| -1 | 2444546 | 1980-11-02 | 378.25 |
| 0 | 2444928 | 1981-11-19 | 378.43 |
| 1 | 2445318 | 1982-12-14 | 378.45 |
| 2 | 2445692 | 1983-12-23 | 378.12 |
| 3 | 2446079 | 1985-01-13 | 378.2 |
| 4 | 2446448 | 1986-01-17 | 377.35 |
| 5 | 2446828 | 1987-02-01 | 375.76 |
| 6 | 2447196 | 1988-02-04 | 374.18 |
| 7 | 2447574 | 1989-02-16 | 373.2 |
| 8 | 2447959 | 1990-03-08 | 371.89 |
| 9 | 2448318 | 1991-03-02 | 370.45 |
| 10 | 2448687 | 1992-03-05 | 369.92 |
| 11 | 2449057 | 1993-03-10 | 370.12 |
| 12 | 2449428 | 1994-03-16 | 369.91 |
| 13 | 2449794 | 1995-03-17 | 369.94 |
| 14 | 2450147 | 1996-03-04 | 371.21 |
| 15 | 2450538 | 1997-03-30 | 372.57 |
| 16 | 2450916 | 1998-04-12 | 373.78 |
| 17 | 2451283 | 1999-04-14 | 375.62 |
| 18 | 2451652 | 2000-04-17 | 377.26 |
| 19 | 2452033 | 2001-05-03 | 378.63 |
| 20 | 2452419 | 2002-05-24 | 378.86 |
| 21 | 2452793 | 2003-06-02 | 378.97 |
| 22 | 2453184 | 2004-06-27 | 378.82 |
| 23 | 2453560 | 2005-07-08 | 377.96 |
| 24 | 2453941 | 2006-07-24 | 376.7 |
| 25 | 2454322 | 2007-08-09 | 375.15 |
| 26 | 2454685 | 2008-08-06 | 373.86 |
| 27 | 2455055 | 2009-08-11 | 371.55 |
| 28 | 2455427 | 2010-08-18 | 369.86 |
| 29 | 2455804 | 2011-08-30 | 368.28 |
| 30 | 2456171 | 2012-08-31 | 367.57 |
| 31 | 2456541 | 2013-09-05 | 367.2 |
| 32 | 2456894 | 2014-08-24 | 367.26 |
| 33 | 2457259 | 2015-08-24 | 367.43 |
| 34 | 2457625 | 2016-08-24 | 368.21 |
| 35 | 2458000 | 2017-09-03 | 369.18 |
| 36 | 2458362 | 2018-08-31 | 369.94 |
| 37 | 2458744 | 2019-09-17 | 371.33 |
| 38 | 2459114 | 2020-09-21 | 372.11 |
| 39 | 2459493 | 2021-10-05 | 372.75 |
| 40 | 2459858 | 2022-10-05 | 372.94 |
| 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. |