| E | O (JD) | O (dat) | Period |
| -89 | 2415803 | 1902-02-22 | 293.5 |
| -88 | 2416095 | 1902-12-11 | 293.27 |
| -84 | 2417276 | 1906-03-06 | 292.86 |
| -83 | 2417568 | 1906-12-23 | 293.82 |
| -79 | 2418740 | 1910-03-09 | 294.25 |
| -78 | 2419030 | 1910-12-24 | 294.72 |
| -74 | 2420200 | 1914-03-08 | 295.06 |
| -73 | 2420514 | 1915-01-16 | 294.89 |
| -72 | 2420800 | 1915-10-29 | 295.14 |
| -68 | 2422002 | 1919-02-12 | 295.49 |
| -63 | 2423464 | 1923-02-13 | 295.47 |
| -62 | 2423755 | 1923-12-01 | 295.09 |
| -59 | 2424640 | 1926-05-04 | 294.45 |
| -58 | 2424932 | 1927-02-20 | 294.31 |
| -57 | 2425237 | 1927-12-22 | 295.64 |
| -56 | 2425520 | 1928-09-30 | 296.1 |
| -53 | 2426410 | 1931-03-09 | 295.75 |
| -52 | 2426708 | 1932-01-01 | 295.2 |
| -51 | 2427015 | 1932-11-03 | 295.85 |
| -49 | 2427598 | 1934-06-09 | 296.2 |
| -48 | 2427889 | 1935-03-27 | 295.35 |
| -47 | 2428184 | 1936-01-16 | 294.15 |
| -46 | 2428490 | 1936-11-17 | 293.36 |
| -43 | 2429364 | 1939-04-10 | 294.37 |
| -42 | 2429661 | 1940-02-01 | 294.5 |
| -41 | 2429945 | 1940-11-11 | 294.14 |
| -37 | 2431122 | 1944-02-01 | 294.62 |
| -36 | 2431430 | 1944-12-05 | 295.03 |
| -33 | 2432300 | 1947-04-24 | 295.42 |
| -32 | 2432610 | 1948-02-28 | 295.85 |
| -31 | 2432904 | 1948-12-18 | 295.59 |
| -17 | 2437037 | 1960-04-12 | 295.47 |
| -16 | 2437340 | 1961-02-09 | 295.48 |
| -15 | 2437632 | 1961-11-28 | 295.15 |
| -14 | 2437926 | 1962-09-18 | 294.87 |
| -10 | 2439100 | 1965-12-05 | 294 |
| -9 | 2439402 | 1966-10-03 | 293.84 |
| -2 | 2441460 | 1972-05-22 | 294.26 |
| -1 | 2441750 | 1973-03-08 | 294.45 |
| 0 | 2442035 | 1973-12-18 | 294.7 |
| 1 | 2442340 | 1974-10-19 | 294.23 |
| 4 | 2443223 | 1977-03-20 | 293.77 |
| 5 | 2443520 | 1978-01-11 | 294.14 |
| 6 | 2443823 | 1978-11-10 | 293.75 |
| 9 | 2444689 | 1981-03-25 | 292.87 |
| 10 | 2444984 | 1982-01-14 | 292.14 |
| 11 | 2445272 | 1982-10-29 | 291.65 |
| 14 | 2446153 | 1985-03-28 | 291.77 |
| 15 | 2446439 | 1986-01-08 | 292.15 |
| 16 | 2446731 | 1986-10-27 | 293.2 |
| 18 | 2447320 | 1988-06-07 | 294.25 |
| 19 | 2447611 | 1989-03-25 | 294.2 |
| 20 | 2447905 | 1990-01-13 | 294.35 |
| 21 | 2448215 | 1990-11-19 | 295 |
| 24 | 2449095 | 1993-04-17 | 295.58 |
| 25 | 2449381 | 1994-01-28 | 296.15 |
| 26 | 2449676 | 1994-11-19 | 296.4 |
| 27 | 2449980 | 1995-09-19 | 296.67 |
| 29 | 2450567 | 1997-04-28 | 296.76 |
| 30 | 2450872 | 1998-02-27 | 296.72 |
| 31 | 2451176 | 1998-12-28 | 296.33 |
| 32 | 2451474 | 1999-10-22 | 295.53 |
| 34 | 2452047 | 2001-05-17 | 294.41 |
| 35 | 2452351 | 2002-03-17 | 293.28 |
| 36 | 2452639 | 2002-12-30 | 292.78 |
| 37 | 2452932 | 2003-10-19 | 292.47 |
| 39 | 2453512 | 2005-05-21 | 293.12 |
| 40 | 2453815 | 2006-03-20 | 294.06 |
| 41 | 2454105 | 2007-01-04 | 294.94 |
| 42 | 2454388 | 2007-10-14 | 295.47 |
| 43 | 2454700 | 2008-08-21 | 296.14 |
| 44 | 2454995 | 2009-06-12 | 297.29 |
| 45 | 2455295 | 2010-04-08 | 298.21 |
| 46 | 2455581 | 2011-01-19 | 297.57 |
| 47 | 2455892 | 2011-11-26 | 296.5 |
| 48 | 2456190 | 2012-09-19 | 296.07 |
| 49 | 2456478 | 2013-07-04 | 296.71 |
| 50 | 2456776 | 2014-04-28 | 295.87 |
| 51 | 2457070 | 2015-02-16 | 293.62 |
| 52 | 2457365 | 2015-12-08 | 293.5 |
| 53 | 2457665 | 2016-10-03 | 294.12 |
| 55 | 2458246 | 2018-05-07 | 293.37 |
| 56 | 2458534 | 2019-02-19 | 293.19 |
| 57 | 2458830 | 2019-12-12 | 293.09 |
| 58 | 2459130 | 2020-10-07 | 292.13 |
| 59 | 2459410 | 2021-07-14 | 293.83 |
| 60 | 2459716 | 2022-05-16 | 295 |
| 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. |