| E | O (JD) | O (dat) | Period |
| -117 | 2412010 | 1891-10-04 | 270.66 |
| -113 | 2413105 | 1894-10-03 | 270.59 |
| -112 | 2413365 | 1895-06-20 | 270.51 |
| -109 | 2414170 | 1897-09-02 | 270.93 |
| -108 | 2414450 | 1898-06-09 | 271.44 |
| -105 | 2415263 | 1900-08-31 | 271.88 |
| -104 | 2415530 | 1901-05-25 | 272.24 |
| -102 | 2416070 | 1902-11-16 | 272.58 |
| -101 | 2416356 | 1903-08-29 | 272.82 |
| -100 | 2416638 | 1904-06-06 | 272.31 |
| -98 | 2417185 | 1905-12-05 | 271.76 |
| -97 | 2417450 | 1906-08-27 | 270.82 |
| -96 | 2417710 | 1907-05-14 | 270.1 |
| -94 | 2418260 | 1908-11-14 | 269.59 |
| -93 | 2418523 | 1909-08-04 | 269.76 |
| -90 | 2419332 | 1911-10-22 | 270.16 |
| -89 | 2419590 | 1912-07-06 | 270.55 |
| -86 | 2420410 | 1914-10-04 | 270.74 |
| -85 | 2420685 | 1915-07-06 | 270.62 |
| -78 | 2422580 | 1920-09-12 | 270.82 |
| -74 | 2423666 | 1923-09-03 | 270.38 |
| -73 | 2423940 | 1924-06-03 | 270.62 |
| -70 | 2424748 | 1926-08-20 | 270.64 |
| -67 | 2425550 | 1928-10-30 | 270.62 |
| -66 | 2425831 | 1929-08-07 | 270.84 |
| -64 | 2426331 | 1930-12-20 | 271.18 |
| -63 | 2426650 | 1931-11-04 | 271.22 |
| -62 | 2426926 | 1932-08-06 | 271.42 |
| -59 | 2427727 | 1934-10-16 | 271.23 |
| -58 | 2428005 | 1935-07-21 | 270.85 |
| -57 | 2428280 | 1936-04-21 | 270.68 |
| -55 | 2428807 | 1937-09-30 | 268.83 |
| -54 | 2429075 | 1938-06-25 | 268.42 |
| -52 | 2429610 | 1939-12-12 | 268.51 |
| -51 | 2429885 | 1940-09-12 | 269.14 |
| -50 | 2430151 | 1941-06-05 | 269.82 |
| -48 | 2430685 | 1942-11-21 | 270.88 |
| -47 | 2430952 | 1943-08-15 | 271.61 |
| -46 | 2431230 | 1944-05-19 | 271.96 |
| -43 | 2432055 | 1946-08-22 | 272.25 |
| -42 | 2432324 | 1947-05-18 | 272.89 |
| -40 | 2432870 | 1948-11-14 | 272.34 |
| -39 | 2433148 | 1949-08-19 | 272.31 |
| -38 | 2433410 | 1950-05-08 | 272.38 |
| -36 | 2433960 | 1951-11-09 | 272.11 |
| -35 | 2434240 | 1952-08-15 | 271.92 |
| -20 | 2438306 | 1963-10-03 | 271.8 |
| -19 | 2438588 | 1964-07-11 | 271.48 |
| -18 | 2438872 | 1965-04-21 | 271.24 |
| -16 | 2439392 | 1966-09-23 | 270.88 |
| -15 | 2439658 | 1967-06-16 | 270.56 |
| -13 | 2440208 | 1968-12-17 | 269.59 |
| -12 | 2440457 | 1969-08-23 | 269.01 |
| -11 | 2440726 | 1970-05-19 | 268.98 |
| -9 | 2441280 | 1971-11-24 | 269.77 |
| -8 | 2441560 | 1972-08-30 | 270.37 |
| -7 | 2441825 | 1973-05-22 | 270.6 |
| -5 | 2442351 | 1974-10-30 | 271.43 |
| -4 | 2442623 | 1975-07-29 | 270.89 |
| -3 | 2442897 | 1976-04-28 | 270.34 |
| -1 | 2443450 | 1977-11-02 | 270 |
| 0 | 2443716 | 1978-07-26 | 270.11 |
| 3 | 2444536 | 1980-10-23 | 270.17 |
| 4 | 2444790 | 1981-07-04 | 270.01 |
| 7 | 2445603 | 1983-09-25 | 269.87 |
| 8 | 2445865 | 1984-06-13 | 269.81 |
| 11 | 2446679 | 1986-09-05 | 269.97 |
| 12 | 2446950 | 1987-06-03 | 270.06 |
| 14 | 2447495 | 1988-11-29 | 270.53 |
| 15 | 2447767 | 1989-08-28 | 270.68 |
| 16 | 2448040 | 1990-05-28 | 270.87 |
| 18 | 2448575 | 1991-11-14 | 270.57 |
| 19 | 2448845 | 1992-08-10 | 270.07 |
| 20 | 2449115 | 1993-05-07 | 269.98 |
| 22 | 2449660 | 1994-11-03 | 270.03 |
| 23 | 2449930 | 1995-07-31 | 270.37 |
| 26 | 2450738 | 1997-10-16 | 270.85 |
| 27 | 2450999 | 1998-07-04 | 270.94 |
| 30 | 2451819 | 2000-10-01 | 270.94 |
| 31 | 2452090 | 2001-06-29 | 270.85 |
| 34 | 2452909 | 2003-09-26 | 271.27 |
| 35 | 2453186 | 2004-06-29 | 271.71 |
| 36 | 2453450 | 2005-03-20 | 272.25 |
| 37 | 2453717 | 2005-12-12 | 272.28 |
| 38 | 2453984 | 2006-09-05 | 272.65 |
| 39 | 2454271 | 2007-06-19 | 272.82 |
| 41 | 2454810 | 2008-12-09 | 273.27 |
| 42 | 2455091 | 2009-09-16 | 273.98 |
| 43 | 2455360 | 2010-06-12 | 274.04 |
| 45 | 2455910 | 2011-12-14 | 273.5 |
| 46 | 2456179 | 2012-09-08 | 272.65 |
| 47 | 2456459 | 2013-06-15 | 272.04 |
| 48 | 2456736 | 2014-03-19 | 271.29 |
| 49 | 2457000 | 2014-12-08 | 270.98 |
| 50 | 2457263 | 2015-08-28 | 270.94 |
| 51 | 2457536 | 2016-05-27 | 270.85 |
| 53 | 2458074 | 2017-11-16 | 270.68 |
| 54 | 2458347 | 2018-08-16 | 271.11 |
| 55 | 2458620 | 2019-05-16 | 272.29 |
| 56 | 2458902 | 2020-02-22 | 272.99 |
| 57 | 2459165 | 2020-11-11 | 273.49 |
| 58 | 2459437 | 2021-08-10 | 274.03 |
| 59 | 2459714 | 2022-05-14 | 274.12 |
| 60 | 2459997 | 2023-02-21 | 274.17 |
| 61 | 2460264 | 2023-11-15 | 274.11 |
| 62 | 2460541 | 2024-08-18 | 275.54 |
| 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. |