| E | O (JD) | O (dat) | Period |
| -55 | 2413840 | 1896-10-07 | 456.29 |
| -50 | 2416110 | 1902-12-26 | 456.03 |
| -49 | 2416575 | 1904-04-04 | 456.2 |
| -46 | 2417950 | 1908-01-09 | 455.98 |
| -45 | 2418415 | 1909-04-18 | 454.8 |
| -42 | 2419760 | 1912-12-23 | 452.05 |
| -41 | 2420220 | 1914-03-28 | 448.71 |
| -40 | 2420685 | 1915-07-06 | 445.64 |
| -39 | 2421130 | 1916-09-23 | 442.24 |
| -36 | 2422460 | 1920-05-15 | 439.2 |
| -32 | 2424200 | 1925-02-18 | 435.86 |
| -31 | 2424630 | 1926-04-24 | 432.88 |
| -29 | 2425500 | 1928-09-10 | 430.81 |
| -27 | 2426360 | 1931-01-18 | 428.78 |
| -26 | 2426755 | 1932-02-17 | 426.68 |
| -25 | 2427158 | 1933-03-26 | 425.33 |
| -22 | 2428444 | 1936-10-02 | 425.73 |
| -21 | 2428890 | 1937-12-22 | 426.13 |
| -20 | 2429303 | 1939-02-08 | 427.42 |
| -19 | 2429750 | 1940-04-30 | 428.9 |
| -18 | 2430168 | 1941-06-22 | 429.16 |
| -16 | 2431035 | 1943-11-06 | 431.54 |
| -15 | 2431460 | 1945-01-04 | 434.27 |
| -14 | 2431890 | 1946-03-10 | 438.83 |
| -13 | 2432310 | 1947-05-04 | 444.12 |
| -12 | 2432730 | 1948-06-27 | 446.35 |
| -8 | 2434520 | 1953-05-22 | 448.02 |
| -5 | 2435850 | 1957-01-11 | 449.1 |
| -1 | 2437670 | 1962-01-05 | 449.97 |
| 8 | 2441740 | 1973-02-26 | 450.56 |
| 9 | 2442188 | 1974-05-20 | 450.84 |
| 13 | 2443996 | 1979-05-02 | 450.91 |
| 15 | 2444899 | 1981-10-21 | 450.47 |
| 16 | 2445354 | 1983-01-19 | 448.91 |
| 17 | 2445786 | 1984-03-26 | 445.84 |
| 18 | 2446217 | 1985-05-31 | 444.23 |
| 19 | 2446669 | 1986-08-26 | 440.94 |
| 20 | 2447093 | 1987-10-24 | 440.05 |
| 21 | 2447543 | 1989-01-16 | 439.65 |
| 22 | 2447978 | 1990-03-27 | 440.62 |
| 23 | 2448426 | 1991-06-18 | 441.03 |
| 24 | 2448860 | 1992-08-25 | 441.19 |
| 25 | 2449312 | 1993-11-20 | 442.3 |
| 26 | 2449740 | 1995-01-22 | 442.48 |
| 27 | 2450192 | 1996-04-18 | 443.26 |
| 28 | 2450629 | 1997-06-29 | 443.48 |
| 29 | 2451075 | 1998-09-18 | 444.39 |
| 30 | 2451525 | 1999-12-12 | 444.14 |
| 31 | 2451967 | 2001-02-26 | 445.01 |
| 32 | 2452415 | 2002-05-20 | 445.55 |
| 33 | 2452855 | 2003-08-03 | 446.19 |
| 34 | 2453308 | 2004-10-29 | 445.59 |
| 35 | 2453738 | 2006-01-02 | 445.56 |
| 36 | 2454196 | 2007-04-05 | 445.05 |
| 37 | 2454652 | 2008-07-04 | 445.3 |
| 38 | 2455094 | 2009-09-19 | 445.31 |
| 40 | 2455970 | 2012-02-12 | 444.99 |
| 42 | 2456870 | 2014-07-31 | 444.41 |
| 43 | 2457300 | 2015-10-04 | 442.65 |
| 44 | 2457764 | 2017-01-10 | 440.87 |
| 45 | 2458202 | 2018-03-24 | 440.45 |
| 46 | 2458643 | 2019-06-08 | 439.59 |
| 47 | 2459071 | 2020-08-09 | 437.14 |
| 48 | 2459496 | 2021-10-08 | 435.89 |
| 49 | 2459924 | 2022-12-10 | 431.71 |
| 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. |