| E | O (JD) | O (dat) | Period |
| -53 | 2414990 | 1899-12-01 | 452.32 |
| -52 | 2415430 | 1901-02-14 | 450.63 |
| -49 | 2416791 | 1904-11-06 | 446.98 |
| -48 | 2417270 | 1906-02-28 | 448.48 |
| -45 | 2418608 | 1909-10-28 | 450 |
| -44 | 2419040 | 1911-01-03 | 449.5 |
| -43 | 2419470 | 1912-03-08 | 448.14 |
| -41 | 2420390 | 1914-09-14 | 447.36 |
| -40 | 2420830 | 1915-11-28 | 449.64 |
| -39 | 2421280 | 1917-02-20 | 452.5 |
| -36 | 2422640 | 1920-11-11 | 454.54 |
| -35 | 2423080 | 1922-01-25 | 455.59 |
| -32 | 2424460 | 1925-11-05 | 456.37 |
| -31 | 2424910 | 1927-01-29 | 458.17 |
| -29 | 2425859 | 1929-09-04 | 459.55 |
| -28 | 2426295 | 1930-11-14 | 459.4 |
| -27 | 2426768 | 1932-03-01 | 459.63 |
| -25 | 2427690 | 1934-09-09 | 456.63 |
| -24 | 2428140 | 1935-12-03 | 454.22 |
| -23 | 2428588 | 1937-02-23 | 454.35 |
| -21 | 2429515 | 1939-09-08 | 452.43 |
| -20 | 2429930 | 1940-10-27 | 452.91 |
| -19 | 2430400 | 1942-02-09 | 453.21 |
| -16 | 2431750 | 1945-10-21 | 452.9 |
| -15 | 2432209 | 1947-01-23 | 456.08 |
| -12 | 2433585 | 1950-10-30 | 457.5 |
| -11 | 2434020 | 1952-01-08 | 456.95 |
| -3 | 2437670 | 1962-01-05 | 457.89 |
| -1 | 2438650 | 1964-09-11 | 457.53 |
| 0 | 2439065 | 1965-10-31 | 458.53 |
| 1 | 2439535 | 1967-02-13 | 460.08 |
| 3 | 2440450 | 1969-08-16 | 457.53 |
| 4 | 2440900 | 1970-11-09 | 456.35 |
| 5 | 2441378 | 1972-03-01 | 457.43 |
| 8 | 2442734 | 1975-11-17 | 455.76 |
| 9 | 2443194 | 1977-02-19 | 455.2 |
| 10 | 2443648 | 1978-05-19 | 454.4 |
| 12 | 2444558 | 1980-11-14 | 452.5 |
| 13 | 2444998 | 1982-01-28 | 451.13 |
| 14 | 2445456 | 1983-05-01 | 450.38 |
| 15 | 2445910 | 1984-07-28 | 448.93 |
| 16 | 2446347 | 1985-10-08 | 449.28 |
| 17 | 2446799 | 1987-01-03 | 450.43 |
| 18 | 2447249 | 1988-03-28 | 450.22 |
| 19 | 2447691 | 1989-06-13 | 451.78 |
| 20 | 2448155 | 1990-09-20 | 453.5 |
| 21 | 2448605 | 1991-12-14 | 454.14 |
| 22 | 2449064 | 1993-03-17 | 455.72 |
| 23 | 2449518 | 1994-06-14 | 458.36 |
| 24 | 2449977 | 1995-09-16 | 459.78 |
| 25 | 2450429 | 1996-12-11 | 460.35 |
| 26 | 2450891 | 1998-03-18 | 460.5 |
| 27 | 2451372 | 1999-07-12 | 460.58 |
| 28 | 2451825 | 2000-10-07 | 461.43 |
| 29 | 2452289 | 2002-01-14 | 461.43 |
| 30 | 2452740 | 2003-04-10 | 458.85 |
| 31 | 2453203 | 2004-07-16 | 458 |
| 32 | 2453663 | 2005-10-19 | 457.93 |
| 33 | 2454117 | 2007-01-16 | 457.43 |
| 34 | 2454570 | 2008-04-13 | 457.28 |
| 35 | 2455039 | 2009-07-26 | 455 |
| 36 | 2455486 | 2010-10-16 | 454.93 |
| 37 | 2455947 | 2012-01-20 | 455.79 |
| 38 | 2456398 | 2013-04-15 | 454.15 |
| 39 | 2456838 | 2014-06-29 | 453.28 |
| 40 | 2457311 | 2015-10-15 | 453.14 |
| 41 | 2457757 | 2017-01-03 | 451.85 |
| 42 | 2458210 | 2018-04-01 | 452.76 |
| 43 | 2458661 | 2019-06-26 | 452.95 |
| 44 | 2459116 | 2020-09-23 | 450.49 |
| 45 | 2459555 | 2021-12-06 | 451.38 |
| 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. |