| E | O (JD) | O (dat) | Period |
| -54 | 2414760 | 1899-04-15 | 243.3 |
| -50 | 2415755 | 1902-01-05 | 243.15 |
| -48 | 2416220 | 1903-04-15 | 243.96 |
| -46 | 2416710 | 1904-08-17 | 245.02 |
| -45 | 2416960 | 1905-04-24 | 245.34 |
| -43 | 2417440 | 1906-08-17 | 245.51 |
| -40 | 2418170 | 1908-08-16 | 245.9 |
| -31 | 2420380 | 1914-09-04 | 246.24 |
| -21 | 2422855 | 1921-06-14 | 246.33 |
| -15 | 2424330 | 1925-06-28 | 246.55 |
| -12 | 2425070 | 1927-07-08 | 246.83 |
| -6 | 2426565 | 1931-08-11 | 247.09 |
| -3 | 2427300 | 1933-08-15 | 247.37 |
| -2 | 2427540 | 1934-04-12 | 247.38 |
| 0 | 2428053 | 1935-09-07 | 247.27 |
| 3 | 2428790 | 1937-09-13 | 246.88 |
| 4 | 2429038 | 1938-05-19 | 246.11 |
| 6 | 2429530 | 1939-09-23 | 245.93 |
| 7 | 2429770 | 1940-05-20 | 245.58 |
| 9 | 2430253 | 1941-09-15 | 245.53 |
| 10 | 2430500 | 1942-05-20 | 246.35 |
| 12 | 2430990 | 1943-09-22 | 246.05 |
| 13 | 2431240 | 1944-05-29 | 246 |
| 15 | 2431730 | 1945-10-01 | 246.09 |
| 16 | 2431999 | 1946-06-27 | 245.76 |
| 19 | 2432740 | 1948-07-07 | 245.47 |
| 22 | 2433450 | 1950-06-17 | 245.23 |
| 25 | 2434190 | 1952-06-26 | 245.11 |
| 27 | 2434685 | 1953-11-03 | 244.88 |
| 28 | 2434915 | 1954-06-21 | 244.76 |
| 40 | 2437870 | 1962-07-24 | 244.92 |
| 43 | 2438601 | 1964-07-24 | 245.16 |
| 46 | 2439340 | 1966-08-02 | 245.14 |
| 52 | 2440800 | 1970-08-01 | 245.21 |
| 55 | 2441540 | 1972-08-10 | 245.46 |
| 58 | 2442280 | 1974-08-20 | 245.44 |
| 61 | 2443016 | 1976-08-25 | 245.48 |
| 64 | 2443750 | 1978-08-29 | 245.54 |
| 65 | 2444000 | 1979-05-06 | 245.77 |
| 67 | 2444500 | 1980-09-17 | 245.64 |
| 68 | 2444740 | 1981-05-15 | 245.67 |
| 70 | 2445220 | 1982-09-07 | 245.76 |
| 71 | 2445471 | 1983-05-16 | 245.92 |
| 73 | 2445962 | 1984-09-18 | 245.68 |
| 74 | 2446210 | 1985-05-24 | 245.52 |
| 76 | 2446706 | 1986-10-02 | 245.58 |
| 77 | 2446950 | 1987-06-03 | 245.62 |
| 78 | 2447200 | 1988-02-08 | 245.11 |
| 79 | 2447437 | 1988-10-02 | 244.74 |
| 80 | 2447681 | 1989-06-03 | 243.94 |
| 82 | 2448168 | 1990-10-03 | 243.69 |
| 83 | 2448416 | 1991-06-08 | 243.43 |
| 85 | 2448904 | 1992-10-08 | 243.41 |
| 86 | 2449148 | 1993-06-09 | 243.96 |
| 88 | 2449624 | 1994-09-28 | 243.64 |
| 89 | 2449878 | 1995-06-09 | 243.12 |
| 91 | 2450357 | 1996-09-30 | 242.69 |
| 94 | 2451093 | 1998-10-06 | 242.53 |
| 95 | 2451350 | 1999-06-20 | 242.61 |
| 97 | 2451817 | 2000-09-29 | 242.76 |
| 98 | 2452050 | 2001-05-20 | 242.51 |
| 100 | 2452537 | 2002-09-19 | 242.69 |
| 101 | 2452784 | 2003-05-24 | 243 |
| 103 | 2453275 | 2004-09-26 | 243.52 |
| 104 | 2453520 | 2005-05-29 | 244.78 |
| 106 | 2454002 | 2006-09-23 | 245.41 |
| 107 | 2454249 | 2007-05-28 | 245.54 |
| 108 | 2454505 | 2008-02-08 | 245.43 |
| 109 | 2454748 | 2008-10-08 | 245.8 |
| 110 | 2454994 | 2009-06-11 | 246.06 |
| 111 | 2455240 | 2010-02-12 | 246.66 |
| 112 | 2455482 | 2010-10-12 | 246.55 |
| 113 | 2455725 | 2011-06-12 | 246.16 |
| 114 | 2455980 | 2012-02-22 | 246.49 |
| 115 | 2456223 | 2012-10-22 | 246.74 |
| 116 | 2456476 | 2013-07-02 | 246.11 |
| 117 | 2456720 | 2014-03-03 | 246.18 |
| 118 | 2456961 | 2014-10-30 | 245.44 |
| 119 | 2457212 | 2015-07-08 | 244.6 |
| 120 | 2457460 | 2016-03-12 | 244.12 |
| 121 | 2457688 | 2016-10-26 | 243.68 |
| 122 | 2457947 | 2017-07-12 | 243.71 |
| 123 | 2458180 | 2018-03-02 | 243.42 |
| 124 | 2458426 | 2018-11-03 | 243.44 |
| 125 | 2458668 | 2019-07-03 | 243.61 |
| 126 | 2458915 | 2020-03-06 | 244.08 |
| 127 | 2459160 | 2020-11-06 | 243.6 |
| 128 | 2459397 | 2021-07-01 | 244.31 |
| 129 | 2459650 | 2022-03-11 | 244.21 |
| 130 | 2459890 | 2022-11-06 | 244.34 |
| 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. |