| E | O (JD) | O (dat) | Period |
| -118 | 2404186 | 1870-05-03 | 324.3 |
| -117 | 2404496 | 1871-03-09 | 322.46 |
| -116 | 2404828 | 1872-02-04 | 321.8 |
| -115 | 2405151 | 1872-12-23 | 321.42 |
| -114 | 2405476 | 1873-11-13 | 321.33 |
| -107 | 2407724 | 1880-01-09 | 320.75 |
| -106 | 2408045 | 1880-11-25 | 319.3 |
| -92 | 2412540 | 1893-03-17 | 318.24 |
| -91 | 2412851 | 1894-01-22 | 318.2 |
| -85 | 2414756 | 1899-04-11 | 318.02 |
| -83 | 2415339 | 1900-11-15 | 316.76 |
| -79 | 2416610 | 1904-05-09 | 314.97 |
| -78 | 2416955 | 1905-04-19 | 315.78 |
| -77 | 2417259 | 1906-02-17 | 320.62 |
| -76 | 2417580 | 1907-01-04 | 326.28 |
| -75 | 2417890 | 1907-11-10 | 326.31 |
| -74 | 2418243 | 1908-10-28 | 324.75 |
| -73 | 2418585 | 1909-10-05 | 325 |
| -71 | 2419237 | 1911-07-19 | 326.44 |
| -70 | 2419549 | 1912-05-26 | 325.75 |
| -69 | 2419861 | 1913-04-03 | 322.38 |
| -68 | 2420178 | 1914-02-14 | 321.8 |
| -67 | 2420515 | 1915-01-17 | 321.86 |
| -66 | 2420830 | 1915-11-28 | 321.57 |
| -65 | 2421156 | 1916-10-19 | 323.36 |
| -64 | 2421493 | 1917-09-21 | 323 |
| -63 | 2421799 | 1918-07-24 | 322.43 |
| -62 | 2422113 | 1919-06-03 | 322.93 |
| -61 | 2422453 | 1920-05-08 | 320.57 |
| -60 | 2422762 | 1921-03-13 | 320.14 |
| -59 | 2423097 | 1922-02-11 | 320.86 |
| -58 | 2423410 | 1922-12-21 | 318.43 |
| -57 | 2423727 | 1923-11-03 | 316.07 |
| -56 | 2424047 | 1924-09-18 | 315.86 |
| -55 | 2424357 | 1925-07-25 | 314.14 |
| -54 | 2424667 | 1926-05-31 | 312.64 |
| -53 | 2424973 | 1927-04-02 | 312.43 |
| -52 | 2425308 | 1928-03-02 | 312.36 |
| -51 | 2425597 | 1928-12-16 | 312.79 |
| -50 | 2425917 | 1929-11-01 | 312.14 |
| -49 | 2426231 | 1930-09-11 | 311 |
| -48 | 2426546 | 1931-07-23 | 312.14 |
| -47 | 2426857 | 1932-05-29 | 311.14 |
| -46 | 2427153 | 1933-03-21 | 308.29 |
| -45 | 2427482 | 1934-02-13 | 307.79 |
| -44 | 2427793 | 1934-12-21 | 308.79 |
| -43 | 2428077 | 1935-10-01 | 310.43 |
| -42 | 2428387 | 1936-08-06 | 310.64 |
| -41 | 2428699 | 1937-06-14 | 309.79 |
| -40 | 2429027 | 1938-05-08 | 311.64 |
| -39 | 2429329 | 1939-03-06 | 312.57 |
| -38 | 2429655 | 1940-01-26 | 312.21 |
| -37 | 2429957 | 1940-11-23 | 312.64 |
| -36 | 2430276 | 1941-10-08 | 313.57 |
| -35 | 2430564 | 1942-07-23 | 316 |
| -34 | 2430893 | 1943-06-17 | 318.14 |
| -33 | 2431210 | 1944-04-29 | 319 |
| -32 | 2431536 | 1945-03-21 | 321.36 |
| -31 | 2431872 | 1946-02-20 | 323.29 |
| -30 | 2432194 | 1947-01-08 | 323.21 |
| -29 | 2432505 | 1947-11-15 | 325.64 |
| -28 | 2432834 | 1948-10-09 | 327 |
| -27 | 2433149 | 1949-08-20 | 328.07 |
| -26 | 2433479 | 1950-07-16 | 329.29 |
| -25 | 2433826 | 1951-06-28 | 329.86 |
| -24 | 2434160 | 1952-05-27 | 331.5 |
| -23 | 2434499 | 1953-05-01 | 331.93 |
| -22 | 2434810 | 1954-03-08 | 328.71 |
| -21 | 2435147 | 1955-02-08 | 327.93 |
| -20 | 2435477 | 1956-01-04 | 328.14 |
| -19 | 2435798 | 1956-11-20 | 329.86 |
| -18 | 2436109 | 1957-09-27 | 331.57 |
| -17 | 2436468 | 1958-09-21 | 329.36 |
| -16 | 2436785 | 1959-08-04 | 331.36 |
| -15 | 2437142 | 1960-07-26 | 335 |
| -14 | 2437457 | 1961-06-06 | 333.86 |
| -13 | 2437778 | 1962-04-23 | 332.36 |
| -12 | 2438136 | 1963-04-16 | 330.29 |
| -11 | 2438461 | 1964-03-06 | 327.36 |
| -10 | 2438790 | 1965-01-29 | 327.14 |
| -9 | 2439116 | 1965-12-21 | 324.57 |
| -8 | 2439435 | 1966-11-05 | 322.07 |
| -7 | 2439747 | 1967-09-13 | 323.79 |
| -6 | 2440068 | 1968-07-30 | 325.43 |
| -5 | 2440390 | 1969-06-17 | 325.79 |
| -4 | 2440716 | 1970-05-09 | 327.43 |
| -3 | 2441068 | 1971-04-26 | 328.43 |
| -2 | 2441394 | 1972-03-17 | 328.14 |
| -1 | 2441718 | 1973-02-04 | 327.71 |
| 0 | 2442048 | 1973-12-31 | 324.71 |
| 1 | 2442365 | 1974-11-13 | 321.86 |
| 2 | 2442687 | 1975-10-01 | 320.57 |
| 3 | 2443007 | 1976-08-16 | 318.79 |
| 4 | 2443323 | 1977-06-28 | 317.79 |
| 5 | 2443645 | 1978-05-16 | 316.71 |
| 6 | 2443955 | 1979-03-22 | 315.43 |
| 7 | 2444274 | 1980-02-04 | 315 |
| 8 | 2444588 | 1980-12-14 | 314.71 |
| 9 | 2444898 | 1981-10-20 | 314.57 |
| 10 | 2445212 | 1982-08-30 | 315 |
| 11 | 2445528 | 1983-07-12 | 314.86 |
| 12 | 2445846 | 1984-05-25 | 315.43 |
| 13 | 2446158 | 1985-04-02 | 316.36 |
| 14 | 2446481 | 1986-02-19 | 316.14 |
| 15 | 2446789 | 1986-12-24 | 315.07 |
| 16 | 2447113 | 1987-11-13 | 313.79 |
| 17 | 2447426 | 1988-09-21 | 312.86 |
| 18 | 2447740 | 1989-08-01 | 313.21 |
| 19 | 2448045 | 1990-06-02 | 314.14 |
| 20 | 2448352 | 1991-04-05 | 314.5 |
| 21 | 2448667 | 1992-02-14 | 314.14 |
| 22 | 2448988 | 1992-12-31 | 313.86 |
| 23 | 2449312 | 1993-11-20 | 315.29 |
| 24 | 2449630 | 1994-10-04 | 317.43 |
| 25 | 2449934 | 1995-08-04 | 318.14 |
| 26 | 2450245 | 1996-06-10 | 317.29 |
| 27 | 2450566 | 1997-04-27 | 317.5 |
| 28 | 2450897 | 1998-03-24 | 318.57 |
| 29 | 2451212 | 1999-02-02 | 318.29 |
| 30 | 2451530 | 1999-12-17 | 317.71 |
| 31 | 2451857 | 2000-11-08 | 316.64 |
| 32 | 2452167 | 2001-09-14 | 315.93 |
| 33 | 2452468 | 2002-07-12 | 316.57 |
| 34 | 2452791 | 2003-05-31 | 317.43 |
| 35 | 2453105 | 2004-04-09 | 318.43 |
| 36 | 2453427 | 2005-02-25 | 320.21 |
| 37 | 2453747 | 2006-01-11 | 322.21 |
| 38 | 2454084 | 2006-12-14 | 324.5 |
| 39 | 2454398 | 2007-10-24 | 326.79 |
| 40 | 2454720 | 2008-09-10 | 328.29 |
| 41 | 2455050 | 2009-08-06 | 329.57 |
| 42 | 2455389 | 2010-07-11 | 330.07 |
| 43 | 2455718 | 2011-06-05 | 331.07 |
| 44 | 2456052 | 2012-05-04 | 331.07 |
| 45 | 2456393 | 2013-04-10 | 330.57 |
| 46 | 2456710 | 2014-02-21 | 330.64 |
| 47 | 2457043 | 2015-01-20 | 329 |
| 48 | 2457362 | 2015-12-05 | 327.79 |
| 49 | 2457705 | 2016-11-12 | 328.21 |
| 50 | 2458031 | 2017-10-04 | 328.29 |
| 51 | 2458345 | 2018-08-14 | 328.93 |
| 52 | 2458689 | 2019-07-24 | 328.6 |
| 53 | 2459009 | 2020-06-08 | 326.46 |
| 54 | 2459340 | 2021-05-05 | 329.67 |
| 55 | 2459670 | 2022-03-31 | 332.8 |
| 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. |