| E | O (JD) | O (dat) | Period |
| -135 | 2400475 | 1860-03-05 | 319.59 |
| -134 | 2400834 | 1861-02-27 | 320.83 |
| -133 | 2401138 | 1861-12-28 | 323.49 |
| -132 | 2401465 | 1862-11-20 | 324.59 |
| -131 | 2401777 | 1863-09-28 | 322.57 |
| -130 | 2402104 | 1864-08-20 | 321.86 |
| -129 | 2402436 | 1865-07-18 | 322.64 |
| -128 | 2402746 | 1866-05-24 | 323.14 |
| -127 | 2403079 | 1867-04-22 | 323.43 |
| -126 | 2403399 | 1868-03-07 | 322.14 |
| -125 | 2403721 | 1869-01-23 | 322.57 |
| -124 | 2404045 | 1869-12-13 | 322.34 |
| -123 | 2404364 | 1870-10-28 | 321.81 |
| -122 | 2404686 | 1871-09-15 | 322.88 |
| -121 | 2405012 | 1872-08-06 | 322.01 |
| -119 | 2405648 | 1874-05-04 | 321.72 |
| -118 | 2405979 | 1875-03-31 | 322.16 |
| -116 | 2406630 | 1877-01-10 | 320.84 |
| -115 | 2406932 | 1877-11-08 | 319.94 |
| -114 | 2407268 | 1878-10-10 | 319.56 |
| -113 | 2407581 | 1879-08-19 | 318.94 |
| -112 | 2407892 | 1880-06-25 | 320.35 |
| -111 | 2408207 | 1881-05-06 | 322.21 |
| -110 | 2408533 | 1882-03-28 | 323 |
| -109 | 2408860 | 1883-02-18 | 324.92 |
| -108 | 2409187 | 1884-01-11 | 326.49 |
| -107 | 2409524 | 1884-12-13 | 327.72 |
| -106 | 2409847 | 1885-11-01 | 329.14 |
| -105 | 2410175 | 1886-09-25 | 328.64 |
| -104 | 2410495 | 1887-08-11 | 326.79 |
| -103 | 2410833 | 1888-07-14 | 326.36 |
| -102 | 2411168 | 1889-06-14 | 325.79 |
| -101 | 2411480 | 1890-04-22 | 324.79 |
| -100 | 2411806 | 1891-03-14 | 322.72 |
| -99 | 2412134 | 1892-02-05 | 320.57 |
| -98 | 2412449 | 1892-12-16 | 321.07 |
| -97 | 2412768 | 1893-10-31 | 321.57 |
| -96 | 2413078 | 1894-09-06 | 323.5 |
| -95 | 2413411 | 1895-08-05 | 324.86 |
| -94 | 2413732 | 1896-06-21 | 323.79 |
| -93 | 2414056 | 1897-05-11 | 326.22 |
| -92 | 2414413 | 1898-05-03 | 328.42 |
| -91 | 2414718 | 1899-03-04 | 327.42 |
| -90 | 2415032 | 1900-01-12 | 327.93 |
| -89 | 2415381 | 1900-12-27 | 324.92 |
| -88 | 2415706 | 1901-11-17 | 323.35 |
| -87 | 2416021 | 1902-09-28 | 326 |
| -86 | 2416358 | 1903-08-31 | 323.86 |
| -85 | 2416660 | 1904-06-28 | 323.14 |
| -84 | 2416998 | 1905-06-01 | 324.36 |
| -83 | 2417316 | 1906-04-15 | 322.5 |
| -82 | 2417631 | 1907-02-24 | 322 |
| -81 | 2417980 | 1908-02-08 | 322 |
| -80 | 2418288 | 1908-12-12 | 323 |
| -79 | 2418606 | 1909-10-26 | 323.95 |
| -78 | 2418920 | 1910-09-05 | 322.65 |
| -74 | 2420212 | 1914-03-20 | 322.8 |
| -73 | 2420562 | 1915-03-05 | 323.5 |
| -72 | 2420864 | 1916-01-01 | 324.55 |
| -71 | 2421200 | 1916-12-02 | 325.24 |
| -70 | 2421524 | 1917-10-22 | 322.29 |
| -69 | 2421840 | 1918-09-03 | 322.64 |
| -68 | 2422177 | 1919-08-06 | 324.43 |
| -67 | 2422484 | 1920-06-08 | 323.64 |
| -66 | 2422802 | 1921-04-22 | 323.36 |
| -65 | 2423141 | 1922-03-27 | 321.93 |
| -64 | 2423465 | 1923-02-14 | 321.29 |
| -63 | 2423790 | 1924-01-05 | 321.5 |
| -62 | 2424101 | 1924-11-11 | 320.78 |
| -61 | 2424423 | 1925-09-29 | 320.42 |
| -60 | 2424736 | 1926-08-08 | 320.14 |
| -59 | 2425051 | 1927-06-19 | 320.85 |
| -58 | 2425383 | 1928-05-16 | 321.85 |
| -57 | 2425709 | 1929-04-07 | 322.14 |
| -56 | 2426028 | 1930-02-20 | 323.86 |
| -55 | 2426355 | 1931-01-13 | 325.57 |
| -54 | 2426675 | 1931-11-29 | 324.93 |
| -53 | 2426994 | 1932-10-13 | 323.5 |
| -52 | 2427327 | 1933-09-11 | 322.07 |
| -51 | 2427665 | 1934-08-15 | 322.14 |
| -50 | 2427976 | 1935-06-22 | 323.14 |
| -49 | 2428290 | 1936-05-01 | 322.43 |
| -48 | 2428602 | 1937-03-09 | 320 |
| -47 | 2428938 | 1938-02-08 | 318.79 |
| -46 | 2429255 | 1938-12-22 | 318.64 |
| -45 | 2429580 | 1939-11-12 | 318.79 |
| -44 | 2429892 | 1940-09-19 | 318.43 |
| -43 | 2430212 | 1941-08-05 | 317.43 |
| -42 | 2430515 | 1942-06-04 | 317.42 |
| -41 | 2430840 | 1943-04-25 | 318.07 |
| -40 | 2431158 | 1944-03-08 | 319.5 |
| -39 | 2431479 | 1945-01-23 | 320.57 |
| -38 | 2431800 | 1945-12-10 | 321.21 |
| -37 | 2432125 | 1946-10-31 | 321.29 |
| -36 | 2432452 | 1947-09-23 | 322.5 |
| -35 | 2432763 | 1948-07-30 | 323.57 |
| -34 | 2433089 | 1949-06-21 | 322.86 |
| -33 | 2433407 | 1950-05-05 | 323.22 |
| -32 | 2433745 | 1951-04-08 | 324.93 |
| -31 | 2434064 | 1952-02-21 | 327.36 |
| -30 | 2434381 | 1953-01-03 | 329.36 |
| -29 | 2434721 | 1953-12-09 | 328.43 |
| -28 | 2435043 | 1954-10-27 | 327.29 |
| -27 | 2435392 | 1955-10-11 | 328.07 |
| -26 | 2435715 | 1956-08-29 | 327.36 |
| -25 | 2436035 | 1957-07-15 | 327.93 |
| -24 | 2436356 | 1958-06-01 | 328.64 |
| -23 | 2436682 | 1959-04-23 | 326.57 |
| -22 | 2437003 | 1960-03-09 | 326.35 |
| -21 | 2437352 | 1961-02-21 | 327.42 |
| -20 | 2437684 | 1962-01-19 | 327 |
| -19 | 2437995 | 1962-11-26 | 326.5 |
| -18 | 2438324 | 1963-10-21 | 325.29 |
| -17 | 2438651 | 1964-09-12 | 323.07 |
| -16 | 2438965 | 1965-07-23 | 323.14 |
| -15 | 2439291 | 1966-06-14 | 323.64 |
| -14 | 2439618 | 1967-05-07 | 323 |
| -13 | 2439941 | 1968-03-25 | 322.29 |
| -12 | 2440262 | 1969-02-09 | 320.85 |
| -11 | 2440588 | 1970-01-01 | 318.99 |
| -10 | 2440909 | 1970-11-18 | 318.79 |
| -9 | 2441219 | 1971-09-24 | 319.85 |
| -8 | 2441529 | 1972-07-30 | 319.57 |
| -7 | 2441846 | 1973-06-12 | 317.79 |
| -6 | 2442176 | 1974-05-08 | 318.14 |
| -5 | 2442505 | 1975-04-02 | 319.72 |
| -4 | 2442819 | 1976-02-10 | 320.5 |
| -3 | 2443127 | 1976-12-14 | 320.93 |
| -2 | 2443455 | 1977-11-07 | 319.64 |
| -1 | 2443769 | 1978-09-17 | 319.72 |
| 0 | 2444093 | 1979-08-07 | 321.22 |
| 1 | 2444422 | 1980-07-01 | 322 |
| 2 | 2444734 | 1981-05-09 | 323 |
| 3 | 2445066 | 1982-04-06 | 323.79 |
| 4 | 2445377 | 1983-02-11 | 323.57 |
| 5 | 2445713 | 1984-01-13 | 325.72 |
| 6 | 2446033 | 1984-11-28 | 327.57 |
| 7 | 2446362 | 1985-10-23 | 327.43 |
| 8 | 2446683 | 1986-09-09 | 328.14 |
| 9 | 2447033 | 1987-08-25 | 328.07 |
| 10 | 2447353 | 1988-07-10 | 327.72 |
| 11 | 2447674 | 1989-05-27 | 328.35 |
| 12 | 2448010 | 1990-04-28 | 327.71 |
| 13 | 2448329 | 1991-03-13 | 326.5 |
| 14 | 2448654 | 1992-02-01 | 327.14 |
| 15 | 2448988 | 1992-12-31 | 326.79 |
| 16 | 2449316 | 1993-11-24 | 325.72 |
| 17 | 2449641 | 1994-10-15 | 325.64 |
| 18 | 2449966 | 1995-09-05 | 325.36 |
| 19 | 2450293 | 1996-07-28 | 323.93 |
| 20 | 2450606 | 1997-06-06 | 322.36 |
| 21 | 2450936 | 1998-05-02 | 321.64 |
| 22 | 2451261 | 1999-03-23 | 321.43 |
| 23 | 2451578 | 2000-02-03 | 322.14 |
| 24 | 2451892 | 2000-12-13 | 322.36 |
| 25 | 2452218 | 2001-11-04 | 321 |
| 26 | 2452541 | 2002-09-23 | 320.79 |
| 27 | 2452868 | 2003-08-16 | 321.5 |
| 28 | 2453187 | 2004-06-30 | 322.21 |
| 29 | 2453504 | 2005-05-13 | 322.71 |
| 30 | 2453826 | 2006-03-31 | 322.5 |
| 31 | 2454145 | 2007-02-13 | 322.14 |
| 32 | 2454476 | 2008-01-10 | 322.93 |
| 33 | 2454801 | 2008-11-30 | 324.64 |
| 34 | 2455123 | 2009-10-18 | 325.43 |
| 35 | 2455442 | 2010-09-02 | 324.72 |
| 36 | 2455770 | 2011-07-27 | 325.14 |
| 37 | 2456105 | 2012-06-26 | 325.29 |
| 38 | 2456422 | 2013-05-09 | 323.92 |
| 39 | 2456745 | 2014-03-28 | 322.99 |
| 40 | 2457084 | 2015-03-02 | 321.43 |
| 41 | 2457394 | 2016-01-06 | 321.42 |
| 42 | 2457706 | 2016-11-13 | 322.28 |
| 43 | 2458028 | 2017-10-01 | 320.57 |
| 44 | 2458347 | 2018-08-16 | 319.93 |
| 45 | 2458680 | 2019-07-15 | 321.35 |
| 46 | 2458999 | 2020-05-29 | 322.75 |
| 47 | 2459318 | 2021-04-13 | 323.83 |
| 48 | 2459639 | 2022-02-28 | 324.79 |
| 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. |