| E | O (JD) | O (dat) | Period |
| -128 | 2400778 | 1861-01-02 | 327.06 |
| -87 | 2414194 | 1897-09-26 | 326.96 |
| -85 | 2414867 | 1899-07-31 | 326.88 |
| -84 | 2415141 | 1900-05-01 | 326.89 |
| -83 | 2415522 | 1901-05-17 | 326.92 |
| -81 | 2416130 | 1903-01-15 | 326.89 |
| -80 | 2416461 | 1903-12-12 | 325.34 |
| -79 | 2416787 | 1904-11-02 | 325.54 |
| -78 | 2417127 | 1905-10-08 | 327.65 |
| -77 | 2417460 | 1906-09-06 | 326.92 |
| -76 | 2417775 | 1907-07-18 | 328.05 |
| -75 | 2418100 | 1908-06-07 | 328.26 |
| -74 | 2418430 | 1909-05-03 | 328.1 |
| -72 | 2419100 | 1911-03-04 | 327.76 |
| -71 | 2419420 | 1912-01-18 | 328.38 |
| -70 | 2419730 | 1912-11-23 | 328.92 |
| -69 | 2420084 | 1913-11-12 | 328.57 |
| -68 | 2420403 | 1914-09-27 | 328.51 |
| -67 | 2420730 | 1915-08-20 | 327.93 |
| -66 | 2421070 | 1916-07-25 | 327.95 |
| -65 | 2421390 | 1917-06-10 | 327.78 |
| -63 | 2422040 | 1919-03-22 | 326.72 |
| -62 | 2422378 | 1920-02-23 | 326.41 |
| -61 | 2422694 | 1921-01-04 | 326.13 |
| -60 | 2423020 | 1921-11-26 | 325.84 |
| -59 | 2423349 | 1922-10-21 | 325.83 |
| -58 | 2423674 | 1923-09-11 | 325.42 |
| -57 | 2423992 | 1924-07-25 | 324.84 |
| -56 | 2424327 | 1925-06-25 | 324.88 |
| -54 | 2424980 | 1927-04-09 | 324.77 |
| -52 | 2425625 | 1929-01-13 | 324.44 |
| -51 | 2425946 | 1929-11-30 | 324.31 |
| -50 | 2426266 | 1930-10-16 | 324.46 |
| -49 | 2426593 | 1931-09-08 | 324.83 |
| -48 | 2426922 | 1932-08-02 | 325.71 |
| -46 | 2427565 | 1934-05-07 | 327.21 |
| -45 | 2427890 | 1935-03-28 | 328.26 |
| -44 | 2428222 | 1936-02-23 | 329.28 |
| -43 | 2428563 | 1937-01-29 | 329.86 |
| -42 | 2428891 | 1937-12-23 | 330.76 |
| -41 | 2429228 | 1938-11-25 | 331.67 |
| -40 | 2429554 | 1939-10-17 | 331.22 |
| -39 | 2429887 | 1940-09-14 | 330.45 |
| -38 | 2430213 | 1941-08-06 | 329.28 |
| -37 | 2430550 | 1942-07-09 | 328.59 |
| -36 | 2430877 | 1943-06-01 | 327.88 |
| -35 | 2431200 | 1944-04-19 | 327.5 |
| -34 | 2431530 | 1945-03-15 | 327.13 |
| -33 | 2431851 | 1946-01-30 | 326.97 |
| -32 | 2432178 | 1946-12-23 | 326.3 |
| -31 | 2432507 | 1947-11-17 | 326.55 |
| -30 | 2432833 | 1948-10-08 | 326.57 |
| -29 | 2433163 | 1949-09-03 | 326.26 |
| -28 | 2433490 | 1950-07-27 | 326.22 |
| -27 | 2433808 | 1951-06-10 | 326.17 |
| -26 | 2434143 | 1952-05-10 | 326.06 |
| -25 | 2434464 | 1953-03-27 | 325.9 |
| -8 | 2440010 | 1968-06-02 | 325.76 |
| -4 | 2441314 | 1971-12-28 | 325.88 |
| -3 | 2441640 | 1972-11-18 | 325.99 |
| -2 | 2441960 | 1973-10-04 | 325.94 |
| -1 | 2442275 | 1974-08-15 | 326.16 |
| 0 | 2442600 | 1975-07-06 | 326.89 |
| 1 | 2442950 | 1976-06-20 | 327.36 |
| 2 | 2443275 | 1977-05-11 | 327.4 |
| 3 | 2443597 | 1978-03-29 | 328.17 |
| 4 | 2443930 | 1979-02-25 | 328.3 |
| 5 | 2444259 | 1980-01-20 | 326.9 |
| 6 | 2444575 | 1980-12-01 | 326.44 |
| 7 | 2444899 | 1981-10-21 | 327 |
| 8 | 2445241 | 1982-09-28 | 327.75 |
| 9 | 2445563 | 1983-08-16 | 328.86 |
| 10 | 2445872 | 1984-06-20 | 329.46 |
| 11 | 2446222 | 1985-06-05 | 330.27 |
| 12 | 2446549 | 1986-04-28 | 330.74 |
| 13 | 2446883 | 1987-03-28 | 331.06 |
| 14 | 2447226 | 1988-03-05 | 331.73 |
| 15 | 2447541 | 1989-01-14 | 332.05 |
| 16 | 2447873 | 1989-12-12 | 331.2 |
| 17 | 2448209 | 1990-11-13 | 331.65 |
| 18 | 2448544 | 1991-10-14 | 331.61 |
| 19 | 2448870 | 1992-09-04 | 331.4 |
| 20 | 2449202 | 1993-08-02 | 330.86 |
| 21 | 2449533 | 1994-06-29 | 329.68 |
| 22 | 2449874 | 1995-06-05 | 329.05 |
| 23 | 2450201 | 1996-04-27 | 328 |
| 24 | 2450527 | 1997-03-19 | 327.25 |
| 25 | 2450837 | 1998-01-23 | 326.72 |
| 26 | 2451167 | 1998-12-19 | 326.69 |
| 27 | 2451506 | 1999-11-23 | 326.64 |
| 28 | 2451820 | 2000-10-02 | 327.79 |
| 29 | 2452147 | 2001-08-25 | 328.64 |
| 30 | 2452481 | 2002-07-25 | 329.48 |
| 31 | 2452816 | 2003-06-25 | 329.29 |
| 32 | 2453141 | 2004-05-15 | 329.42 |
| 33 | 2453480 | 2005-04-19 | 329.76 |
| 34 | 2453802 | 2006-03-07 | 329.06 |
| 35 | 2454131 | 2007-01-30 | 328.27 |
| 36 | 2454457 | 2007-12-22 | 327.85 |
| 37 | 2454792 | 2008-11-21 | 327.64 |
| 38 | 2455115 | 2009-10-10 | 327.14 |
| 39 | 2455437 | 2010-08-28 | 327.7 |
| 40 | 2455766 | 2011-07-23 | 327.14 |
| 41 | 2456097 | 2012-06-18 | 327.62 |
| 42 | 2456423 | 2013-05-10 | 327.55 |
| 43 | 2456748 | 2014-03-31 | 327.25 |
| 44 | 2457086 | 2015-03-04 | 327.3 |
| 45 | 2457396 | 2016-01-08 | 327.03 |
| 46 | 2457743 | 2016-12-20 | 325.82 |
| 47 | 2458062 | 2017-11-04 | 326 |
| 48 | 2458376 | 2018-09-14 | 325.76 |
| 49 | 2458713 | 2019-08-17 | 325.25 |
| 50 | 2459039 | 2020-07-08 | 325.62 |
| 51 | 2459344 | 2021-05-09 | 324.18 |
| 52 | 2459693 | 2022-04-23 | 325.29 |
| 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. |