| E | O (JD) | O (dat) | Period |
| -58 | 2425673 | 1929-03-02 | 323.73 |
| -55 | 2426676 | 1931-11-30 | 325.34 |
| -54 | 2426991 | 1932-10-10 | 327.39 |
| -53 | 2427315 | 1933-08-30 | 325.32 |
| -52 | 2427635 | 1934-07-16 | 324.22 |
| -51 | 2427970 | 1935-06-16 | 323.95 |
| -44 | 2430264 | 1941-09-26 | 324.26 |
| -18 | 2438664 | 1964-09-25 | 324.15 |
| -17 | 2438974 | 1965-08-01 | 324.15 |
| -16 | 2439313 | 1966-07-06 | 323.53 |
| -12 | 2440610 | 1970-01-23 | 322.38 |
| -11 | 2440920 | 1970-11-29 | 321.5 |
| -10 | 2441265 | 1971-11-09 | 320.86 |
| -9 | 2441557 | 1972-08-27 | 320.37 |
| -8 | 2441878 | 1973-07-14 | 320.01 |
| -7 | 2442190 | 1974-05-22 | 319.25 |
| -5 | 2442835 | 1976-02-26 | 320.74 |
| -4 | 2443175 | 1977-01-31 | 322.74 |
| -3 | 2443475 | 1977-11-27 | 323.5 |
| -2 | 2443818 | 1978-11-05 | 324.27 |
| -1 | 2444136 | 1979-09-19 | 323.07 |
| 0 | 2444463 | 1980-08-11 | 323.28 |
| 1 | 2444781 | 1981-06-25 | 323.93 |
| 2 | 2445108 | 1982-05-18 | 323.65 |
| 3 | 2445425 | 1983-03-31 | 323.86 |
| 4 | 2445751 | 1984-02-20 | 324.43 |
| 5 | 2446077 | 1985-01-11 | 325.92 |
| 6 | 2446408 | 1985-12-08 | 326.36 |
| 7 | 2446725 | 1986-10-21 | 326.22 |
| 8 | 2447061 | 1987-09-22 | 326.01 |
| 9 | 2447391 | 1988-08-17 | 325 |
| 10 | 2447711 | 1989-07-03 | 324.71 |
| 11 | 2448032 | 1990-05-20 | 326.14 |
| 12 | 2448360 | 1991-04-13 | 326.01 |
| 13 | 2448675 | 1992-02-22 | 325.36 |
| 14 | 2449004 | 1993-01-16 | 325.64 |
| 15 | 2449348 | 1993-12-26 | 325.92 |
| 16 | 2449668 | 1994-11-11 | 327 |
| 17 | 2449989 | 1995-09-28 | 328.15 |
| 18 | 2450313 | 1996-08-17 | 327.93 |
| 19 | 2450642 | 1997-07-12 | 326.14 |
| 20 | 2450971 | 1998-06-06 | 325.28 |
| 21 | 2451302 | 1999-05-03 | 326.28 |
| 22 | 2451641 | 2000-04-06 | 327.29 |
| 23 | 2451941 | 2001-01-31 | 326.36 |
| 24 | 2452270 | 2001-12-26 | 325.21 |
| 25 | 2452600 | 2002-11-21 | 324.49 |
| 26 | 2452937 | 2003-10-24 | 325.36 |
| 27 | 2453245 | 2004-08-27 | 327.29 |
| 28 | 2453581 | 2005-07-29 | 328.01 |
| 29 | 2453905 | 2006-06-18 | 326.78 |
| 30 | 2454232 | 2007-05-11 | 326.85 |
| 31 | 2454561 | 2008-04-04 | 327.5 |
| 32 | 2454901 | 2009-03-10 | 326.51 |
| 33 | 2455211 | 2010-01-14 | 327.08 |
| 34 | 2455547 | 2010-12-16 | 327.28 |
| 35 | 2455864 | 2011-10-29 | 325.35 |
| 36 | 2456193 | 2012-09-22 | 325.14 |
| 37 | 2456523 | 2013-08-18 | 326.01 |
| 38 | 2456852 | 2014-07-13 | 325.86 |
| 39 | 2457165 | 2015-05-22 | 326.36 |
| 40 | 2457499 | 2016-04-20 | 324.63 |
| 41 | 2457823 | 2017-03-10 | 323.64 |
| 42 | 2458150 | 2018-01-31 | 325.36 |
| 43 | 2458476 | 2018-12-23 | 325.29 |
| 44 | 2458785 | 2019-10-28 | 324.13 |
| 45 | 2459121 | 2020-09-28 | 323.85 |
| 46 | 2459451 | 2021-08-24 | 322.67 |
| 47 | 2459767 | 2022-07-06 | 322.02 |
| 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. |