| E | O (JD) | O (dat) | Period |
| -74 | 2424357 | 1925-07-25 | 399 |
| -73 | 2424716 | 1926-07-19 | 398.22 |
| -71 | 2425519 | 1928-09-29 | 396.87 |
| -70 | 2425916 | 1929-10-31 | 394.95 |
| -68 | 2426723 | 1932-01-16 | 394.71 |
| -67 | 2427115 | 1933-02-11 | 394.52 |
| -66 | 2427508 | 1934-03-11 | 394 |
| -60 | 2429880 | 1940-09-07 | 391.97 |
| -59 | 2430245 | 1941-09-07 | 390.86 |
| -58 | 2430642 | 1942-10-09 | 391.3 |
| -57 | 2431037 | 1943-11-08 | 391.18 |
| -46 | 2435321 | 1955-08-01 | 391.18 |
| -45 | 2435715 | 1956-08-29 | 392 |
| -44 | 2436125 | 1957-10-13 | 392.67 |
| -43 | 2436519 | 1958-11-11 | 394.59 |
| -42 | 2436906 | 1959-12-03 | 397 |
| -41 | 2437309 | 1961-01-09 | 395.05 |
| -38 | 2438506 | 1964-04-20 | 393.95 |
| -36 | 2439295 | 1966-06-18 | 395.8 |
| -35 | 2439681 | 1967-07-09 | 396.45 |
| -34 | 2440060 | 1968-07-22 | 394.83 |
| -33 | 2440463 | 1969-08-29 | 394.07 |
| -32 | 2440878 | 1970-10-18 | 394.05 |
| -31 | 2441266 | 1971-11-10 | 393.46 |
| -30 | 2441656 | 1972-12-04 | 392.93 |
| -29 | 2442056 | 1974-01-08 | 392 |
| -21 | 2445195 | 1982-08-13 | 391.61 |
| -20 | 2445563 | 1983-08-16 | 391.86 |
| -19 | 2445962 | 1984-09-18 | 392.11 |
| -18 | 2446355 | 1985-10-16 | 392.69 |
| -17 | 2446754 | 1986-11-19 | 393.08 |
| -16 | 2447140 | 1987-12-10 | 393.5 |
| -15 | 2447551 | 1989-01-24 | 393.54 |
| -9 | 2449910 | 1995-07-11 | 392.88 |
| -8 | 2450282 | 1996-07-17 | 392.25 |
| -7 | 2450687 | 1997-08-26 | 391.54 |
| -6 | 2451075 | 1998-09-18 | 389.79 |
| -5 | 2451463 | 1999-10-11 | 388.79 |
| -4 | 2451845 | 2000-10-27 | 389 |
| -3 | 2452243 | 2001-11-29 | 388.93 |
| -2 | 2452624 | 2002-12-15 | 389.4 |
| -1 | 2453011 | 2004-01-06 | 389.31 |
| 0 | 2453404 | 2005-02-02 | 388.87 |
| 1 | 2453803 | 2006-03-08 | 388.75 |
| 3 | 2454576 | 2008-04-19 | 390.37 |
| 4 | 2454961 | 2009-05-09 | 391.19 |
| 5 | 2455349 | 2010-06-01 | 390.56 |
| 6 | 2455738 | 2011-06-25 | 390.93 |
| 7 | 2456143 | 2012-08-03 | 392.79 |
| 8 | 2456531 | 2013-08-26 | 393.21 |
| 9 | 2456925 | 2014-09-24 | 393.07 |
| 10 | 2457318 | 2015-10-22 | 392.86 |
| 11 | 2457718 | 2016-11-25 | 392.5 |
| 12 | 2458097 | 2017-12-09 | 393.5 |
| 13 | 2458493 | 2019-01-09 | 393.76 |
| 14 | 2458888 | 2020-02-08 | 391.6 |
| 15 | 2459281 | 2021-03-07 | 393 |
| 16 | 2459684 | 2022-04-14 | 395.8 |
| 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. |