| E | O (JD) | O (dat) | Period |
| -66 | 2415390 | 1901-01-05 | 420.03 |
| -65 | 2415820 | 1902-03-11 | 418.27 |
| -59 | 2418327 | 1909-01-20 | 417.49 |
| -58 | 2418742 | 1910-03-11 | 418.43 |
| -54 | 2420430 | 1914-10-24 | 418.44 |
| -53 | 2420820 | 1915-11-18 | 419.07 |
| -52 | 2421260 | 1917-01-31 | 419.2 |
| -51 | 2421660 | 1918-03-07 | 418 |
| -48 | 2422940 | 1921-09-07 | 417.36 |
| -47 | 2423360 | 1922-11-01 | 416.11 |
| -46 | 2423770 | 1923-12-16 | 415.18 |
| -40 | 2426270 | 1930-10-20 | 415.17 |
| -39 | 2426666 | 1931-11-20 | 414.53 |
| -38 | 2427065 | 1932-12-23 | 414.83 |
| -37 | 2427480 | 1934-02-11 | 414.76 |
| -33 | 2429160 | 1938-09-18 | 416.26 |
| -32 | 2429576 | 1939-11-08 | 418.38 |
| -31 | 2429999 | 1941-01-04 | 418.54 |
| -30 | 2430410 | 1942-02-19 | 417.71 |
| -26 | 2432100 | 1946-10-06 | 417.95 |
| -25 | 2432509 | 1947-11-19 | 417.84 |
| -24 | 2432918 | 1949-01-01 | 417 |
| -12 | 2437924 | 1962-09-16 | 416.34 |
| -10 | 2438784 | 1965-01-23 | 415.12 |
| -9 | 2439176 | 1966-02-19 | 414.61 |
| -8 | 2439581 | 1967-03-31 | 412.94 |
| -7 | 2439999 | 1968-05-22 | 408.29 |
| -3 | 2441630 | 1972-11-08 | 409.69 |
| -2 | 2442040 | 1973-12-23 | 412.77 |
| -1 | 2442429 | 1975-01-16 | 413.81 |
| 0 | 2442853 | 1976-03-15 | 414.44 |
| 4 | 2444530 | 1980-10-17 | 415.5 |
| 5 | 2444959 | 1981-12-20 | 417.25 |
| 6 | 2445380 | 1983-02-14 | 417.95 |
| 7 | 2445781 | 1984-03-21 | 416.83 |
| 8 | 2446199 | 1985-05-13 | 415.65 |
| 9 | 2446615 | 1986-07-03 | 415 |
| 10 | 2447026 | 1987-08-18 | 415.49 |
| 11 | 2447443 | 1988-10-08 | 416.07 |
| 12 | 2447865 | 1989-12-04 | 414.22 |
| 13 | 2448284 | 1991-01-27 | 414.22 |
| 14 | 2448694 | 1992-03-12 | 414.64 |
| 15 | 2449111 | 1993-05-03 | 413.28 |
| 16 | 2449502 | 1994-05-29 | 413.43 |
| 17 | 2449938 | 1995-08-08 | 413.22 |
| 18 | 2450336 | 1996-09-09 | 412.29 |
| 19 | 2450758 | 1997-11-05 | 413.78 |
| 20 | 2451179 | 1998-12-31 | 415.13 |
| 21 | 2451584 | 2000-02-09 | 415.07 |
| 22 | 2451993 | 2001-03-24 | 414.43 |
| 23 | 2452413 | 2002-05-18 | 411.15 |
| 24 | 2452839 | 2003-07-18 | 411.5 |
| 25 | 2453246 | 2004-08-28 | 413.06 |
| 26 | 2453650 | 2005-10-06 | 413.93 |
| 27 | 2454043 | 2006-11-03 | 415.15 |
| 28 | 2454481 | 2008-01-15 | 417.58 |
| 29 | 2454879 | 2009-02-16 | 419.5 |
| 30 | 2455322 | 2010-05-05 | 419.85 |
| 31 | 2455742 | 2011-06-29 | 418.28 |
| 32 | 2456189 | 2012-09-18 | 417.79 |
| 33 | 2456580 | 2013-10-14 | 418.86 |
| 34 | 2456991 | 2014-11-29 | 419.21 |
| 35 | 2457389 | 2016-01-01 | 417.85 |
| 36 | 2457820 | 2017-03-07 | 416.78 |
| 37 | 2458245 | 2018-05-06 | 419.22 |
| 38 | 2458688 | 2019-07-23 | 421.91 |
| 39 | 2459093 | 2020-08-31 | 425.34 |
| 40 | 2459511 | 2021-10-23 | 424.24 |
| 41 | 2459929 | 2022-12-15 | 424.08 |
| 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. |