| E | O (JD) | O (dat) | Period |
| -112 | 2408162 | 1881-03-22 | 306.99 |
| -108 | 2409391 | 1884-08-02 | 307.4 |
| -107 | 2409684 | 1885-05-22 | 307.16 |
| -106 | 2410002 | 1886-04-05 | 307.44 |
| -100 | 2411835 | 1891-04-12 | 307.57 |
| -95 | 2413383 | 1895-07-08 | 308.31 |
| -94 | 2413697 | 1896-05-17 | 309.01 |
| -90 | 2414910 | 1899-09-12 | 309.49 |
| -89 | 2415237 | 1900-08-05 | 309.37 |
| -87 | 2415850 | 1902-04-10 | 310.23 |
| -82 | 2417430 | 1906-08-07 | 310.45 |
| -81 | 2417738 | 1907-06-11 | 310.31 |
| -80 | 2418040 | 1908-04-08 | 310.09 |
| -79 | 2418318 | 1909-01-11 | 309.54 |
| -78 | 2418661 | 1909-12-20 | 309.13 |
| -75 | 2419585 | 1912-07-01 | 306.86 |
| -74 | 2419881 | 1913-04-23 | 306.59 |
| -73 | 2420177 | 1914-02-13 | 306.39 |
| -72 | 2420511 | 1915-01-13 | 305.82 |
| -71 | 2420814 | 1915-11-12 | 303.46 |
| -70 | 2421087 | 1916-08-11 | 302.92 |
| -69 | 2421401 | 1917-06-21 | 303.27 |
| -68 | 2421705 | 1918-04-21 | 303.51 |
| -67 | 2422004 | 1919-02-14 | 303.57 |
| -66 | 2422306 | 1919-12-13 | 304.4 |
| -65 | 2422618 | 1920-10-20 | 305.32 |
| -63 | 2423226 | 1922-06-20 | 305.17 |
| -62 | 2423536 | 1923-04-26 | 305.82 |
| -61 | 2423847 | 1924-03-02 | 306.09 |
| -60 | 2424141 | 1924-12-21 | 306.28 |
| -57 | 2425057 | 1927-06-25 | 306.39 |
| -56 | 2425365 | 1928-04-28 | 306.75 |
| -55 | 2425685 | 1929-03-14 | 306.76 |
| -54 | 2425983 | 1930-01-06 | 307.01 |
| -53 | 2426294 | 1930-11-13 | 307.06 |
| -52 | 2426603 | 1931-09-18 | 306.93 |
| -51 | 2426911 | 1932-07-22 | 306.5 |
| -50 | 2427213 | 1933-05-20 | 306.28 |
| -49 | 2427522 | 1934-03-25 | 306.21 |
| -48 | 2427815 | 1935-01-12 | 306.33 |
| -45 | 2428746 | 1937-07-31 | 305.47 |
| -44 | 2429050 | 1938-05-31 | 305.07 |
| -43 | 2429360 | 1939-04-06 | 305.65 |
| -42 | 2429658 | 1940-01-29 | 305.2 |
| -41 | 2429977 | 1940-12-13 | 305.63 |
| -39 | 2430559 | 1942-07-18 | 304.69 |
| -38 | 2430869 | 1943-05-24 | 304.41 |
| -37 | 2431200 | 1944-04-19 | 304.39 |
| -36 | 2431480 | 1945-01-24 | 303.63 |
| -35 | 2431806 | 1945-12-16 | 302.86 |
| -33 | 2432399 | 1947-08-01 | 302.9 |
| -32 | 2432701 | 1948-05-29 | 302.98 |
| -31 | 2433012 | 1949-04-05 | 302.5 |
| -30 | 2433290 | 1950-01-08 | 303.54 |
| -29 | 2433598 | 1950-11-12 | 303.24 |
| -28 | 2433903 | 1951-09-13 | 304.33 |
| -27 | 2434235 | 1952-08-10 | 305.44 |
| -26 | 2434523 | 1953-05-25 | 306.66 |
| -25 | 2434833 | 1954-03-31 | 308.05 |
| -24 | 2435131 | 1955-01-23 | 308.03 |
| -23 | 2435437 | 1955-11-25 | 308.2 |
| -22 | 2435758 | 1956-10-11 | 308.04 |
| -21 | 2436070 | 1957-08-19 | 309.23 |
| -20 | 2436374 | 1958-06-19 | 309.29 |
| -19 | 2436682 | 1959-04-23 | 310.41 |
| -18 | 2436995 | 1960-03-01 | 309.84 |
| -17 | 2437301 | 1961-01-01 | 309.19 |
| -16 | 2437612 | 1961-11-08 | 307.87 |
| -15 | 2437917 | 1962-09-09 | 306.79 |
| -14 | 2438247 | 1963-08-05 | 305.94 |
| -13 | 2438535 | 1964-05-19 | 305.04 |
| -12 | 2438847 | 1965-03-27 | 304.58 |
| -11 | 2439129 | 1966-01-03 | 304.01 |
| -10 | 2439434 | 1966-11-04 | 303.8 |
| -9 | 2439747 | 1967-09-13 | 303.53 |
| -8 | 2440051 | 1968-07-13 | 304.25 |
| -7 | 2440359 | 1969-05-17 | 304.28 |
| -6 | 2440662 | 1970-03-16 | 304.85 |
| -5 | 2440969 | 1971-01-17 | 304.32 |
| -4 | 2441273 | 1971-11-17 | 304.07 |
| -3 | 2441570 | 1972-09-09 | 304.17 |
| -2 | 2441874 | 1973-07-10 | 303.71 |
| -1 | 2442179 | 1974-05-11 | 303.09 |
| 0 | 2442483 | 1975-03-11 | 302.89 |
| 1 | 2442794 | 1976-01-16 | 302.85 |
| 2 | 2443098 | 1976-11-15 | 302.79 |
| 3 | 2443391 | 1977-09-04 | 302.78 |
| 4 | 2443686 | 1978-06-26 | 302.22 |
| 5 | 2443997 | 1979-05-03 | 302.45 |
| 6 | 2444299 | 1980-02-29 | 302.01 |
| 7 | 2444600 | 1980-12-26 | 302.14 |
| 8 | 2444910 | 1981-11-01 | 302.93 |
| 9 | 2445201 | 1982-08-19 | 303.56 |
| 10 | 2445518 | 1983-07-02 | 303.32 |
| 11 | 2445806 | 1984-04-15 | 303.06 |
| 12 | 2446110 | 1985-02-13 | 302.91 |
| 13 | 2446423 | 1985-12-23 | 303.27 |
| 14 | 2446733 | 1986-10-29 | 303.51 |
| 15 | 2447028 | 1987-08-20 | 303.18 |
| 16 | 2447323 | 1988-06-10 | 303.18 |
| 17 | 2447628 | 1989-04-11 | 302.13 |
| 18 | 2447944 | 1990-02-21 | 300.83 |
| 19 | 2448238 | 1990-12-12 | 300.85 |
| 20 | 2448542 | 1991-10-12 | 301.42 |
| 21 | 2448837 | 1992-08-02 | 301.53 |
| 22 | 2449132 | 1993-05-24 | 301.15 |
| 23 | 2449427 | 1994-03-15 | 300.87 |
| 24 | 2449744 | 1995-01-26 | 301.35 |
| 25 | 2450048 | 1995-11-26 | 301.77 |
| 26 | 2450347 | 1996-09-20 | 302.58 |
| 27 | 2450646 | 1997-07-16 | 303.39 |
| 28 | 2450947 | 1998-05-13 | 303.56 |
| 29 | 2451248 | 1999-03-10 | 303.2 |
| 30 | 2451555 | 2000-01-11 | 303.03 |
| 31 | 2451862 | 2000-11-13 | 303.51 |
| 32 | 2452172 | 2001-09-19 | 304.15 |
| 33 | 2452471 | 2002-07-15 | 304.65 |
| 34 | 2452773 | 2003-05-13 | 304.36 |
| 35 | 2453066 | 2004-03-01 | 303.43 |
| 36 | 2453380 | 2005-01-09 | 302.69 |
| 37 | 2453691 | 2005-11-16 | 302.05 |
| 38 | 2453998 | 2006-09-19 | 301.84 |
| 39 | 2454290 | 2007-07-08 | 301.46 |
| 40 | 2454583 | 2008-04-26 | 300.95 |
| 41 | 2454886 | 2009-02-23 | 299.37 |
| 42 | 2455186 | 2009-12-20 | 299.12 |
| 43 | 2455488 | 2010-10-18 | 299.43 |
| 44 | 2455789 | 2011-08-15 | 299.4 |
| 45 | 2456087 | 2012-06-08 | 299.15 |
| 46 | 2456375 | 2013-03-23 | 298.58 |
| 47 | 2456689 | 2014-01-31 | 298.23 |
| 48 | 2456990 | 2014-11-28 | 298.42 |
| 49 | 2457274 | 2015-09-08 | 298.55 |
| 50 | 2457574 | 2016-07-04 | 298.71 |
| 51 | 2457872 | 2017-04-28 | 298.55 |
| 52 | 2458171 | 2018-02-21 | 297.91 |
| 53 | 2458480 | 2018-12-27 | 298.15 |
| 54 | 2458775 | 2019-10-18 | 298.83 |
| 55 | 2459072 | 2020-08-10 | 298.58 |
| 56 | 2459364 | 2021-05-29 | 298.25 |
| 57 | 2459663 | 2022-03-24 | 297.4 |
| 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. |