| E | O (JD) | O (dat) | Period |
| -86 | 2404595 | 1871-06-16 | 464.57 |
| -85 | 2405053 | 1872-09-16 | 460.21 |
| -84 | 2405522 | 1873-12-29 | 459.88 |
| -83 | 2405984 | 1875-04-05 | 459.67 |
| -82 | 2406454 | 1876-07-18 | 460.28 |
| -81 | 2406914 | 1877-10-21 | 460.93 |
| -80 | 2407339 | 1878-12-20 | 461.12 |
| -79 | 2407817 | 1880-04-11 | 461.03 |
| -78 | 2408276 | 1881-07-14 | 461.87 |
| -77 | 2408749 | 1882-10-30 | 462.5 |
| -76 | 2409216 | 1884-02-09 | 463.34 |
| -75 | 2409674 | 1885-05-12 | 464.32 |
| -74 | 2410134 | 1886-08-15 | 463.58 |
| -73 | 2410608 | 1887-12-02 | 463.41 |
| -72 | 2411066 | 1889-03-04 | 462.73 |
| -71 | 2411523 | 1890-06-04 | 462.99 |
| -70 | 2411988 | 1891-09-12 | 463.69 |
| -69 | 2412455 | 1892-12-22 | 463.18 |
| -68 | 2412917 | 1894-03-29 | 462.88 |
| -67 | 2413375 | 1895-06-30 | 463.33 |
| -66 | 2413848 | 1896-10-15 | 463.57 |
| -65 | 2414317 | 1898-01-27 | 464.6 |
| -64 | 2414761 | 1899-04-16 | 465.52 |
| -63 | 2415231 | 1900-07-30 | 466.62 |
| -62 | 2415698 | 1901-11-09 | 467.43 |
| -61 | 2416162 | 1903-02-16 | 467.34 |
| -60 | 2416650 | 1904-06-18 | 468.26 |
| -59 | 2417115 | 1905-09-26 | 470.74 |
| -58 | 2417584 | 1907-01-08 | 471.48 |
| -57 | 2418049 | 1908-04-17 | 471.15 |
| -56 | 2418506 | 1909-07-18 | 472.18 |
| -55 | 2418987 | 1910-11-11 | 469.85 |
| -54 | 2419486 | 1912-03-24 | 468.31 |
| -53 | 2419949 | 1913-06-30 | 465.19 |
| -52 | 2420399 | 1914-09-23 | 463.83 |
| -51 | 2420902 | 1916-02-08 | 461.27 |
| -50 | 2421312 | 1917-03-24 | 458.83 |
| -49 | 2421774 | 1918-06-29 | 456.66 |
| -48 | 2422206 | 1919-09-04 | 454.36 |
| -47 | 2422700 | 1921-01-10 | 453.56 |
| -46 | 2423139 | 1922-03-25 | 452.95 |
| -45 | 2423611 | 1923-07-10 | 454.45 |
| -44 | 2424061 | 1924-10-02 | 454.22 |
| -43 | 2424474 | 1925-11-19 | 454.15 |
| -42 | 2424949 | 1927-03-09 | 453.23 |
| -41 | 2425413 | 1928-06-15 | 455.77 |
| -40 | 2425859 | 1929-09-04 | 457.61 |
| -39 | 2426320 | 1930-12-09 | 460.78 |
| -38 | 2426771 | 1932-03-04 | 463.09 |
| -37 | 2427233 | 1933-06-09 | 464.11 |
| -36 | 2427722 | 1934-10-11 | 466.25 |
| -35 | 2428184 | 1936-01-16 | 468.74 |
| -34 | 2428656 | 1937-05-02 | 470.36 |
| -33 | 2429106 | 1938-07-26 | 472.25 |
| -32 | 2429591 | 1939-11-23 | 472.84 |
| -31 | 2430069 | 1941-03-15 | 473.62 |
| -30 | 2430544 | 1942-07-03 | 474.46 |
| -29 | 2431016 | 1943-10-18 | 475.35 |
| -28 | 2431500 | 1945-02-13 | 475.63 |
| -27 | 2431966 | 1946-05-25 | 475.07 |
| -26 | 2432455 | 1947-09-26 | 474.8 |
| -25 | 2432914 | 1948-12-28 | 473.77 |
| -24 | 2433399 | 1950-04-27 | 473.72 |
| -23 | 2433862 | 1951-08-03 | 473.68 |
| -22 | 2434345 | 1952-11-28 | 474.08 |
| -21 | 2434817 | 1954-03-15 | 472.98 |
| -20 | 2435272 | 1955-06-13 | 472.73 |
| -19 | 2435764 | 1956-10-17 | 471.52 |
| -18 | 2436242 | 1958-02-07 | 470.4 |
| -17 | 2436716 | 1959-05-27 | 468.65 |
| -16 | 2437167 | 1960-08-20 | 467.12 |
| -15 | 2437639 | 1961-12-05 | 465.45 |
| -14 | 2438104 | 1963-03-15 | 462.55 |
| -13 | 2438562 | 1964-06-15 | 461.81 |
| -12 | 2439025 | 1965-09-21 | 460.82 |
| -11 | 2439483 | 1966-12-23 | 460.05 |
| -10 | 2439941 | 1968-03-25 | 459.4 |
| -9 | 2440393 | 1969-06-20 | 459.52 |
| -8 | 2440874 | 1970-10-14 | 460.31 |
| -7 | 2441317 | 1971-12-31 | 460.89 |
| -6 | 2441768 | 1973-03-26 | 461.65 |
| -5 | 2442240 | 1974-07-11 | 462.15 |
| -4 | 2442705 | 1975-10-19 | 462.31 |
| -3 | 2443175 | 1977-01-31 | 462.59 |
| -2 | 2443635 | 1978-05-06 | 463.55 |
| -1 | 2444098 | 1979-08-12 | 462.95 |
| 0 | 2444557 | 1980-11-13 | 461.47 |
| 1 | 2445015 | 1982-02-14 | 460.66 |
| 2 | 2445490 | 1983-06-04 | 460.07 |
| 3 | 2445947 | 1984-09-03 | 459.91 |
| 4 | 2446396 | 1985-11-26 | 460.13 |
| 5 | 2446851 | 1987-02-24 | 461.08 |
| 6 | 2447316 | 1988-06-03 | 462.22 |
| 7 | 2447778 | 1989-09-08 | 462.25 |
| 8 | 2448238 | 1990-12-12 | 463.3 |
| 9 | 2448707 | 1992-03-25 | 465.36 |
| 10 | 2449182 | 1993-07-13 | 465.21 |
| 11 | 2449652 | 1994-10-26 | 466.12 |
| 12 | 2450097 | 1996-01-14 | 467.54 |
| 13 | 2450566 | 1997-04-27 | 467.66 |
| 14 | 2451055 | 1998-08-29 | 466.71 |
| 15 | 2451489 | 1999-11-06 | 466.47 |
| 16 | 2451985 | 2001-03-16 | 466.47 |
| 17 | 2452465 | 2002-07-09 | 465.96 |
| 18 | 2452912 | 2003-09-29 | 465.27 |
| 19 | 2453363 | 2004-12-23 | 464.28 |
| 20 | 2453841 | 2006-04-15 | 465.64 |
| 21 | 2454303 | 2007-07-21 | 466.28 |
| 22 | 2454752 | 2008-10-12 | 467.6 |
| 23 | 2455234 | 2010-02-06 | 469.81 |
| 24 | 2455692 | 2011-05-10 | 471.64 |
| 25 | 2456182 | 2012-09-11 | 471.98 |
| 26 | 2456671 | 2014-01-13 | 472.6 |
| 27 | 2457127 | 2015-04-14 | 472.35 |
| 28 | 2457599 | 2016-07-29 | 471.7 |
| 29 | 2458081 | 2017-11-23 | 471.38 |
| 30 | 2458541 | 2019-02-26 | 469.32 |
| 31 | 2459009 | 2020-06-08 | 467.86 |
| 32 | 2459469 | 2021-09-11 | 468.57 |
| 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. |