| E | O (JD) | O (dat) | Period |
| -149 | 2404880 | 1872-03-27 | 340.4 |
| -148 | 2405234 | 1873-03-16 | 336 |
| -147 | 2405552 | 1874-01-28 | 320.9 |
| -146 | 2405862 | 1874-12-04 | 317.85 |
| -145 | 2406233 | 1875-12-10 | 316.97 |
| -144 | 2406547 | 1876-10-19 | 315.69 |
| -136 | 2409050 | 1883-08-27 | 314.94 |
| -133 | 2409971 | 1886-03-05 | 311.53 |
| -132 | 2410286 | 1887-01-14 | 309.03 |
| -131 | 2410602 | 1887-11-26 | 307.97 |
| -130 | 2410890 | 1888-09-09 | 306.75 |
| -127 | 2411797 | 1891-03-05 | 309.93 |
| -126 | 2412108 | 1892-01-10 | 314.13 |
| -125 | 2412420 | 1892-11-17 | 317.44 |
| -120 | 2413963 | 1897-02-07 | 317.13 |
| -118 | 2414662 | 1899-01-07 | 315.11 |
| -115 | 2415650 | 1901-09-22 | 317 |
| -114 | 2416000 | 1902-09-07 | 317.67 |
| -113 | 2416201 | 1903-03-27 | 320.23 |
| -112 | 2416527 | 1904-02-16 | 319.87 |
| -111 | 2416877 | 1905-01-31 | 315.5 |
| -110 | 2417130 | 1905-10-11 | 318.92 |
| -106 | 2418540 | 1909-08-21 | 324.56 |
| -103 | 2419449 | 1912-02-16 | 324.67 |
| -102 | 2419773 | 1913-01-05 | 324.71 |
| -101 | 2420082 | 1913-11-10 | 320.72 |
| -99 | 2420760 | 1915-09-19 | 316.8 |
| -97 | 2421410 | 1917-06-30 | 321.85 |
| -96 | 2421689 | 1918-04-05 | 324.91 |
| -95 | 2421999 | 1919-02-09 | 322.64 |
| -94 | 2422326 | 1920-01-02 | 318.14 |
| -91 | 2423333 | 1922-10-05 | 319.25 |
| -90 | 2423670 | 1923-09-07 | 322.1 |
| -88 | 2424270 | 1925-04-29 | 322.1 |
| -87 | 2424581 | 1926-03-06 | 319.94 |
| -86 | 2424903 | 1927-01-22 | 317.75 |
| -85 | 2425227 | 1927-12-12 | 320.47 |
| -84 | 2425540 | 1928-10-20 | 325.43 |
| -83 | 2425878 | 1929-09-23 | 327.36 |
| -82 | 2426209 | 1930-08-20 | 327.21 |
| -81 | 2426538 | 1931-07-15 | 327.57 |
| -80 | 2426869 | 1932-06-10 | 327.29 |
| -79 | 2427198 | 1933-05-05 | 326.64 |
| -78 | 2427513 | 1934-03-16 | 325.14 |
| -77 | 2427840 | 1935-02-06 | 322.64 |
| -76 | 2428160 | 1935-12-23 | 322.86 |
| -75 | 2428500 | 1936-11-27 | 324.57 |
| -74 | 2428799 | 1937-09-22 | 325.93 |
| -73 | 2429125 | 1938-08-14 | 326.43 |
| -72 | 2429462 | 1939-07-17 | 325.43 |
| -71 | 2429793 | 1940-06-12 | 326 |
| -70 | 2430123 | 1941-05-08 | 327.14 |
| -69 | 2430447 | 1942-03-28 | 324.21 |
| -68 | 2430769 | 1943-02-13 | 322.93 |
| -67 | 2431094 | 1944-01-04 | 323 |
| -66 | 2431410 | 1944-11-15 | 321.36 |
| -65 | 2431716 | 1945-09-17 | 319.79 |
| -64 | 2432060 | 1946-08-27 | 319.79 |
| -63 | 2432378 | 1947-07-11 | 321.79 |
| -62 | 2432691 | 1948-05-19 | 323.36 |
| -61 | 2433002 | 1949-03-26 | 321.71 |
| -60 | 2433338 | 1950-02-25 | 321.21 |
| -59 | 2433671 | 1951-01-24 | 323.71 |
| -58 | 2433982 | 1951-12-01 | 325.43 |
| -57 | 2434298 | 1952-10-12 | 325.43 |
| -56 | 2434637 | 1953-09-16 | 323.21 |
| -55 | 2434964 | 1954-08-09 | 320.57 |
| -54 | 2435285 | 1955-06-26 | 320.21 |
| -53 | 2435611 | 1956-05-17 | 319.07 |
| -52 | 2435923 | 1957-03-25 | 317.07 |
| -51 | 2436218 | 1958-01-14 | 316.29 |
| -50 | 2436545 | 1958-12-07 | 314.21 |
| -49 | 2436857 | 1959-10-15 | 313.21 |
| -48 | 2437183 | 1960-09-05 | 316.29 |
| -47 | 2437494 | 1961-07-13 | 318.29 |
| -46 | 2437801 | 1962-05-16 | 318.71 |
| -45 | 2438118 | 1963-03-29 | 319.5 |
| -44 | 2438451 | 1964-02-25 | 318 |
| -43 | 2438768 | 1965-01-07 | 318.36 |
| -42 | 2439096 | 1965-12-01 | 320.07 |
| -41 | 2439417 | 1966-10-18 | 319.36 |
| -40 | 2439712 | 1967-08-09 | 318 |
| -39 | 2440040 | 1968-07-02 | 316.29 |
| -38 | 2440360 | 1969-05-18 | 315.93 |
| -37 | 2440680 | 1970-04-03 | 317.71 |
| -36 | 2440991 | 1971-02-08 | 316.57 |
| -35 | 2441301 | 1971-12-15 | 314.86 |
| -34 | 2441635 | 1972-11-13 | 316.07 |
| -33 | 2441942 | 1973-09-16 | 314.57 |
| -32 | 2442242 | 1974-07-13 | 315.36 |
| -31 | 2442566 | 1975-06-02 | 316.07 |
| -30 | 2442899 | 1976-04-30 | 314.43 |
| -29 | 2443176 | 1977-02-01 | 317.29 |
| -28 | 2443531 | 1978-01-22 | 318.57 |
| -27 | 2443830 | 1978-11-17 | 317.57 |
| -26 | 2444149 | 1979-10-02 | 321.07 |
| -25 | 2444477 | 1980-08-25 | 321.5 |
| -24 | 2444791 | 1981-07-05 | 321.36 |
| -23 | 2445120 | 1982-05-30 | 324.79 |
| -22 | 2445450 | 1983-04-25 | 324 |
| -21 | 2445758 | 1984-02-27 | 323.93 |
| -20 | 2446102 | 1985-02-05 | 326.64 |
| -19 | 2446424 | 1985-12-24 | 326.5 |
| -18 | 2446738 | 1986-11-03 | 324.71 |
| -17 | 2447065 | 1987-09-26 | 322.21 |
| -16 | 2447419 | 1988-09-14 | 321.43 |
| -15 | 2447722 | 1989-07-14 | 323.64 |
| -14 | 2448032 | 1990-05-20 | 322.21 |
| -13 | 2448339 | 1991-03-23 | 317.79 |
| -12 | 2448687 | 1992-03-05 | 316.93 |
| -11 | 2449006 | 1993-01-18 | 320 |
| -10 | 2449308 | 1993-11-16 | 322.5 |
| -9 | 2449625 | 1994-09-29 | 322.36 |
| -8 | 2449953 | 1995-08-23 | 321.86 |
| -7 | 2450281 | 1996-07-16 | 324.79 |
| -6 | 2450605 | 1997-06-05 | 327.57 |
| -5 | 2450934 | 1998-04-30 | 328.29 |
| -4 | 2451265 | 1999-03-27 | 328.36 |
| -3 | 2451596 | 2000-02-21 | 328.86 |
| -2 | 2451923 | 2001-01-13 | 330.07 |
| -1 | 2452251 | 2001-12-07 | 330.36 |
| 0 | 2452580 | 2002-11-01 | 328.79 |
| 1 | 2452910 | 2003-09-27 | 325 |
| 2 | 2453250 | 2004-09-01 | 322.86 |
| 3 | 2453574 | 2005-07-22 | 320.93 |
| 4 | 2453890 | 2006-06-03 | 317 |
| 5 | 2454179 | 2007-03-19 | 314.36 |
| 6 | 2454515 | 2008-02-18 | 313.93 |
| 7 | 2454809 | 2008-12-08 | 313.57 |
| 8 | 2455119 | 2009-10-14 | 313.21 |
| 9 | 2455442 | 2010-09-02 | 313.5 |
| 10 | 2455777 | 2011-08-03 | 314.07 |
| 11 | 2456077 | 2012-05-29 | 315.57 |
| 12 | 2456377 | 2013-03-25 | 316 |
| 13 | 2456706 | 2014-02-17 | 316.43 |
| 14 | 2457015 | 2014-12-23 | 319.36 |
| 15 | 2457331 | 2015-11-04 | 323.21 |
| 16 | 2457654 | 2016-09-22 | 323.29 |
| 17 | 2457995 | 2017-08-29 | 320.36 |
| 18 | 2458330 | 2018-07-30 | 320.14 |
| 19 | 2458649 | 2019-06-14 | 320.93 |
| 20 | 2458960 | 2020-04-20 | 319.76 |
| 21 | 2459246 | 2021-01-31 | 315.46 |
| 22 | 2459582 | 2022-01-02 | 310.5 |
| 23 | 2459896 | 2022-11-12 | 308.8 |
| 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. |