| E | O (JD) | O (dat) | Period |
| -156 | 2386831 | 1822-10-27 | 373.47 |
| -125 | 2398451 | 1854-08-20 | 373.32 |
| -118 | 2401056 | 1861-10-07 | 372.59 |
| -115 | 2402181 | 1864-11-05 | 373.09 |
| -114 | 2402545 | 1865-11-04 | 372.6 |
| -113 | 2402914 | 1866-11-08 | 369.65 |
| -111 | 2403646 | 1868-11-09 | 367.39 |
| -110 | 2404007 | 1869-11-05 | 367 |
| -109 | 2404376 | 1870-11-09 | 369.37 |
| -108 | 2404742 | 1871-11-10 | 371 |
| -107 | 2405108 | 1872-11-10 | 372.23 |
| -106 | 2405490 | 1873-11-27 | 372.96 |
| -105 | 2405879 | 1874-12-21 | 372.35 |
| -100 | 2407730 | 1880-01-15 | 373.41 |
| -99 | 2408112 | 1881-01-31 | 374.09 |
| -97 | 2408849 | 1883-02-07 | 374.3 |
| -94 | 2409950 | 1886-02-12 | 375.2 |
| -84 | 2413716 | 1896-06-05 | 375.35 |
| -83 | 2414090 | 1897-06-14 | 376.2 |
| -81 | 2414871 | 1899-08-04 | 378.47 |
| -80 | 2415247 | 1900-08-15 | 381.74 |
| -79 | 2415609 | 1901-08-12 | 385.72 |
| -77 | 2416400 | 1903-10-12 | 385.5 |
| -76 | 2416781 | 1904-10-27 | 385.83 |
| -75 | 2417192 | 1905-12-12 | 385.43 |
| -74 | 2417557 | 1906-12-12 | 383.81 |
| -72 | 2418343 | 1909-02-05 | 382.35 |
| -71 | 2418720 | 1910-02-17 | 380.19 |
| -65 | 2421001 | 1916-05-17 | 378.81 |
| -64 | 2421371 | 1917-05-22 | 377.6 |
| -63 | 2421751 | 1918-06-06 | 374.71 |
| -62 | 2422107 | 1919-05-28 | 371.47 |
| -61 | 2422491 | 1920-06-15 | 366.57 |
| -60 | 2422849 | 1921-06-08 | 364.07 |
| -59 | 2423207 | 1922-06-01 | 361.36 |
| -58 | 2423572 | 1923-06-01 | 359.64 |
| -57 | 2423932 | 1924-05-26 | 358.86 |
| -56 | 2424287 | 1925-05-16 | 359.64 |
| -55 | 2424630 | 1926-04-24 | 360.5 |
| -54 | 2425003 | 1927-05-02 | 360.14 |
| -53 | 2425361 | 1928-04-24 | 361.21 |
| -52 | 2425730 | 1929-04-28 | 364.21 |
| -51 | 2426096 | 1930-04-29 | 364.93 |
| -50 | 2426450 | 1931-04-18 | 366.14 |
| -49 | 2426826 | 1932-04-28 | 369.29 |
| -48 | 2427190 | 1933-04-27 | 370.93 |
| -47 | 2427552 | 1934-04-24 | 373 |
| -46 | 2427938 | 1935-05-15 | 375.79 |
| -45 | 2428323 | 1936-06-03 | 378.43 |
| -44 | 2428696 | 1937-06-11 | 380.57 |
| -43 | 2429072 | 1938-06-22 | 380.71 |
| -42 | 2429465 | 1939-07-20 | 379.14 |
| -41 | 2429849 | 1940-08-07 | 378.43 |
| -40 | 2430221 | 1941-08-14 | 378.93 |
| -39 | 2430599 | 1942-08-27 | 377.29 |
| -38 | 2430970 | 1943-09-02 | 375.36 |
| -37 | 2431347 | 1944-09-13 | 375.71 |
| -36 | 2431726 | 1945-09-27 | 376.36 |
| -35 | 2432093 | 1946-09-29 | 376.21 |
| -34 | 2432476 | 1947-10-17 | 375.5 |
| -33 | 2432854 | 1948-10-29 | 374.29 |
| -32 | 2433235 | 1949-11-14 | 374.29 |
| -31 | 2433601 | 1950-11-15 | 373.21 |
| -30 | 2433973 | 1951-11-22 | 371.14 |
| -29 | 2434340 | 1952-11-23 | 370.21 |
| -28 | 2434719 | 1953-12-07 | 368.86 |
| -27 | 2435075 | 1954-11-28 | 368.93 |
| -26 | 2435451 | 1955-12-09 | 370.29 |
| -25 | 2435821 | 1956-12-13 | 367.86 |
| -24 | 2436179 | 1957-12-06 | 367.71 |
| -23 | 2436560 | 1958-12-22 | 370.79 |
| -22 | 2436937 | 1960-01-03 | 370.5 |
| -21 | 2437272 | 1960-12-03 | 371.07 |
| -20 | 2437670 | 1962-01-05 | 371.86 |
| -19 | 2438047 | 1963-01-17 | 371 |
| -18 | 2438412 | 1964-01-17 | 372.79 |
| -17 | 2438783 | 1965-01-22 | 373.07 |
| -16 | 2439162 | 1966-02-05 | 370.86 |
| -15 | 2439529 | 1967-02-07 | 371.14 |
| -14 | 2439899 | 1968-02-12 | 371.71 |
| -13 | 2440266 | 1969-02-13 | 371.21 |
| -12 | 2440643 | 1970-02-25 | 372.07 |
| -11 | 2441012 | 1971-03-01 | 372.93 |
| -10 | 2441387 | 1972-03-10 | 373.79 |
| -9 | 2441755 | 1973-03-13 | 375.21 |
| -8 | 2442145 | 1974-04-07 | 375.43 |
| -7 | 2442504 | 1975-04-01 | 376.43 |
| -6 | 2442894 | 1976-04-25 | 377.29 |
| -5 | 2443268 | 1977-05-04 | 377.43 |
| -4 | 2443643 | 1978-05-14 | 378.43 |
| -3 | 2444026 | 1979-06-01 | 378.5 |
| -2 | 2444398 | 1980-06-07 | 378 |
| -1 | 2444786 | 1981-06-30 | 379.57 |
| 0 | 2445161 | 1982-07-10 | 380.86 |
| 1 | 2445536 | 1983-07-20 | 381.36 |
| 2 | 2445918 | 1984-08-05 | 380.21 |
| 3 | 2446307 | 1985-08-29 | 378.57 |
| 4 | 2446694 | 1986-09-20 | 378.79 |
| 5 | 2447069 | 1987-09-30 | 378.43 |
| 6 | 2447438 | 1988-10-03 | 376.64 |
| 7 | 2447809 | 1989-10-09 | 375 |
| 8 | 2448191 | 1990-10-26 | 374.14 |
| 9 | 2448561 | 1991-10-31 | 374.36 |
| 10 | 2448937 | 1992-11-10 | 374.71 |
| 11 | 2449314 | 1993-11-22 | 373.86 |
| 12 | 2449687 | 1994-11-30 | 371.93 |
| 13 | 2450061 | 1995-12-09 | 370.86 |
| 14 | 2450432 | 1996-12-14 | 370.43 |
| 15 | 2450802 | 1997-12-19 | 369 |
| 16 | 2451157 | 1998-12-09 | 367.79 |
| 17 | 2451533 | 1999-12-20 | 368.64 |
| 18 | 2451904 | 2000-12-25 | 370.14 |
| 19 | 2452263 | 2001-12-19 | 371.71 |
| 20 | 2452634 | 2002-12-25 | 372.07 |
| 21 | 2453020 | 2004-01-15 | 371.64 |
| 22 | 2453396 | 2005-01-25 | 372.64 |
| 23 | 2453767 | 2006-01-31 | 372.79 |
| 24 | 2454132 | 2007-01-31 | 371.43 |
| 25 | 2454508 | 2008-02-11 | 370.36 |
| 26 | 2454876 | 2009-02-13 | 370.14 |
| 27 | 2455240 | 2010-02-12 | 370.07 |
| 28 | 2455614 | 2011-02-21 | 368.71 |
| 29 | 2455987 | 2012-02-29 | 368.07 |
| 30 | 2456358 | 2013-03-06 | 369.5 |
| 31 | 2456722 | 2014-03-05 | 370.36 |
| 32 | 2457080 | 2015-02-26 | 371.5 |
| 33 | 2457457 | 2016-03-09 | 372.5 |
| 34 | 2457832 | 2017-03-19 | 373.21 |
| 35 | 2458207 | 2018-03-29 | 375.36 |
| 36 | 2458595 | 2019-04-21 | 376.76 |
| 37 | 2458965 | 2020-04-25 | 377.23 |
| 38 | 2459340 | 2021-05-05 | 378.25 |
| 39 | 2459717 | 2022-05-17 | 378.9 |
| 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. |