| E | O (JD) | O (dat) | Period |
| -79 | 2414790 | 1899-05-15 | 380.14 |
| -78 | 2415180 | 1900-06-09 | 380 |
| -77 | 2415555 | 1901-06-19 | 379.52 |
| -76 | 2415940 | 1902-07-09 | 379.33 |
| -75 | 2416320 | 1903-07-24 | 379.27 |
| -74 | 2416690 | 1904-07-28 | 379.73 |
| -73 | 2417075 | 1905-08-17 | 379.79 |
| -72 | 2417450 | 1906-08-27 | 380.22 |
| -71 | 2417830 | 1907-09-11 | 380.17 |
| -70 | 2418210 | 1908-09-25 | 379.63 |
| -69 | 2418600 | 1909-10-20 | 379.39 |
| -67 | 2419360 | 1911-11-19 | 378.97 |
| -66 | 2419740 | 1912-12-03 | 378.65 |
| -65 | 2420115 | 1913-12-13 | 378.41 |
| -62 | 2421240 | 1917-01-11 | 378.26 |
| -61 | 2421620 | 1918-01-26 | 377.78 |
| -60 | 2422000 | 1919-02-10 | 377.43 |
| -59 | 2422375 | 1920-02-20 | 377.33 |
| -58 | 2422760 | 1921-03-11 | 377.34 |
| -56 | 2423520 | 1923-04-10 | 377.59 |
| -55 | 2423890 | 1924-04-14 | 377.19 |
| -54 | 2424260 | 1925-04-19 | 376.99 |
| -53 | 2424639 | 1926-05-03 | 376.83 |
| -52 | 2425015 | 1927-05-14 | 376.39 |
| -51 | 2425400 | 1928-06-02 | 377.02 |
| -50 | 2425770 | 1929-06-07 | 377.52 |
| -49 | 2426150 | 1930-06-22 | 377.67 |
| -48 | 2426526 | 1931-07-03 | 377.06 |
| -47 | 2426900 | 1932-07-11 | 376.6 |
| -46 | 2427285 | 1933-07-31 | 375.98 |
| -46 | 2427288 | 1933-08-03 | 375.98 |
| -45 | 2427657 | 1934-08-07 | 375.1 |
| -44 | 2428027 | 1935-08-12 | 375.25 |
| -43 | 2428405 | 1936-08-24 | 375.78 |
| -42 | 2428780 | 1937-09-03 | 376.07 |
| -41 | 2429150 | 1938-09-08 | 376.09 |
| -40 | 2429530 | 1939-09-23 | 376.44 |
| -39 | 2429912 | 1940-10-09 | 376.47 |
| -37 | 2430670 | 1942-11-06 | 376.56 |
| -21 | 2436683 | 1959-04-24 | 376.39 |
| -20 | 2437058 | 1960-05-03 | 376.22 |
| -18 | 2437822 | 1962-06-06 | 376.06 |
| -17 | 2438190 | 1963-06-09 | 375.68 |
| -16 | 2438577 | 1964-06-30 | 375.23 |
| -14 | 2439304 | 1966-06-27 | 373.71 |
| -13 | 2439678 | 1967-07-06 | 373.33 |
| -12 | 2440064 | 1968-07-26 | 373.17 |
| -11 | 2440420 | 1969-07-17 | 373.82 |
| -10 | 2440800 | 1970-08-01 | 374.41 |
| -7 | 2441923 | 1973-08-28 | 375.56 |
| -6 | 2442297 | 1974-09-06 | 375.89 |
| -5 | 2442678 | 1975-09-22 | 376.21 |
| -4 | 2443059 | 1976-10-07 | 377.21 |
| -3 | 2443439 | 1977-10-22 | 377.54 |
| -2 | 2443813 | 1978-10-31 | 377.99 |
| -1 | 2444190 | 1979-11-12 | 378.15 |
| 0 | 2444567 | 1980-11-23 | 378.53 |
| 1 | 2444947 | 1981-12-08 | 378.45 |
| 2 | 2445327 | 1982-12-23 | 377.92 |
| 3 | 2445700 | 1983-12-31 | 377.74 |
| 4 | 2446084 | 1985-01-18 | 377.57 |
| 5 | 2446472 | 1986-02-10 | 377.62 |
| 6 | 2446840 | 1987-02-13 | 377.59 |
| 7 | 2447205 | 1988-02-13 | 377.33 |
| 8 | 2447586 | 1989-02-28 | 376.95 |
| 9 | 2447967 | 1990-03-16 | 376.16 |
| 10 | 2448350 | 1991-04-03 | 375.84 |
| 11 | 2448728 | 1992-04-15 | 376.06 |
| 12 | 2449099 | 1993-04-21 | 376.2 |
| 13 | 2449471 | 1994-04-28 | 375.78 |
| 14 | 2449843 | 1995-05-05 | 375.48 |
| 15 | 2450221 | 1996-05-17 | 375.76 |
| 16 | 2450595 | 1997-05-26 | 376.07 |
| 17 | 2450976 | 1998-06-11 | 376.12 |
| 18 | 2451353 | 1999-06-23 | 376.35 |
| 19 | 2451728 | 2000-07-02 | 375.93 |
| 20 | 2452112 | 2001-07-21 | 375.15 |
| 21 | 2452482 | 2002-07-26 | 374.93 |
| 22 | 2452849 | 2003-07-28 | 374.41 |
| 23 | 2453232 | 2004-08-14 | 374.45 |
| 24 | 2453598 | 2005-08-15 | 374.44 |
| 25 | 2453969 | 2006-08-21 | 374.34 |
| 26 | 2454353 | 2007-09-09 | 374.98 |
| 27 | 2454724 | 2008-09-14 | 374.87 |
| 28 | 2455105 | 2009-09-30 | 374.73 |
| 29 | 2455477 | 2010-10-07 | 375.06 |
| 30 | 2455850 | 2011-10-15 | 374.11 |
| 31 | 2456230 | 2012-10-29 | 373.23 |
| 32 | 2456593 | 2013-10-27 | 373.15 |
| 33 | 2456974 | 2014-11-12 | 372.95 |
| 34 | 2457350 | 2015-11-23 | 373.48 |
| 35 | 2457706 | 2016-11-13 | 374.13 |
| 36 | 2458084 | 2017-11-26 | 374.24 |
| 37 | 2458464 | 2018-12-11 | 374.93 |
| 38 | 2458838 | 2019-12-20 | 375.01 |
| 39 | 2459220 | 2021-01-05 | 376.04 |
| 40 | 2459599 | 2022-01-19 | 378.49 |
| 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. |