| E | O (JD) | O (dat) | Period |
| -96 | 2415590 | 1901-07-24 | 300.74 |
| -92 | 2416800 | 1904-11-15 | 301.32 |
| -91 | 2417117 | 1905-09-28 | 302.28 |
| -90 | 2417434 | 1906-08-11 | 302.17 |
| -79 | 2420720 | 1915-08-10 | 302.02 |
| -68 | 2424050 | 1924-09-21 | 301.69 |
| -67 | 2424375 | 1925-08-12 | 300.79 |
| -66 | 2424640 | 1926-05-04 | 301.22 |
| -65 | 2424965 | 1927-03-25 | 301.67 |
| -63 | 2425545 | 1928-10-25 | 298.06 |
| -62 | 2425850 | 1929-08-26 | 297.16 |
| -61 | 2426160 | 1930-07-02 | 297.7 |
| -59 | 2426755 | 1932-02-17 | 296.95 |
| -58 | 2427035 | 1932-11-23 | 296.64 |
| -56 | 2427626 | 1934-07-07 | 295.64 |
| -55 | 2427933 | 1935-05-10 | 294.81 |
| -52 | 2428813 | 1937-10-06 | 296.14 |
| -51 | 2429108 | 1938-07-28 | 298.29 |
| -50 | 2429406 | 1939-05-22 | 299.07 |
| -49 | 2429700 | 1940-03-11 | 300.11 |
| -46 | 2430605 | 1942-09-02 | 301.88 |
| -44 | 2431215 | 1944-05-04 | 301.64 |
| -40 | 2432419 | 1947-08-21 | 301.2 |
| -39 | 2432730 | 1948-06-27 | 301.09 |
| -38 | 2433040 | 1949-05-03 | 300.3 |
| -35 | 2433920 | 1951-09-30 | 299.85 |
| -34 | 2434222 | 1952-07-28 | 299.71 |
| -28 | 2436019 | 1957-06-29 | 299.51 |
| -22 | 2437813 | 1962-05-28 | 299.95 |
| -21 | 2438115 | 1963-03-26 | 300.44 |
| -20 | 2438423 | 1964-01-28 | 300.18 |
| -18 | 2439028 | 1965-09-24 | 299.91 |
| -17 | 2439330 | 1966-07-23 | 299.67 |
| -16 | 2439628 | 1967-05-17 | 299.7 |
| -8 | 2442020 | 1973-12-03 | 299.28 |
| -7 | 2442309 | 1974-09-18 | 298.46 |
| -6 | 2442609 | 1975-07-15 | 298.64 |
| -5 | 2442920 | 1976-05-21 | 299.05 |
| -4 | 2443210 | 1977-03-07 | 300.64 |
| -3 | 2443505 | 1977-12-27 | 303.36 |
| -2 | 2443815 | 1978-11-02 | 302.57 |
| -1 | 2444113 | 1979-08-27 | 301.67 |
| 0 | 2444425 | 1980-07-04 | 303.25 |
| 1 | 2444740 | 1981-05-15 | 303.63 |
| 2 | 2445025 | 1982-02-24 | 303.31 |
| 4 | 2445630 | 1983-10-22 | 303.25 |
| 5 | 2445937 | 1984-08-24 | 302.24 |
| 6 | 2446241 | 1985-06-24 | 302 |
| 7 | 2446540 | 1986-04-19 | 302.88 |
| 8 | 2446850 | 1987-02-23 | 302.13 |
| 10 | 2447453 | 1988-10-18 | 300.82 |
| 11 | 2447748 | 1989-08-09 | 300.56 |
| 12 | 2448056 | 1990-06-13 | 300.17 |
| 13 | 2448345 | 1991-03-29 | 300.35 |
| 15 | 2448947 | 1992-11-20 | 300.88 |
| 16 | 2449244 | 1993-09-13 | 299.62 |
| 17 | 2449549 | 1994-07-15 | 299.75 |
| 18 | 2449860 | 1995-05-22 | 300.67 |
| 19 | 2450155 | 1996-03-12 | 300.64 |
| 20 | 2450443 | 1996-12-25 | 300.79 |
| 21 | 2450754 | 1997-11-01 | 298.93 |
| 22 | 2451048 | 1998-08-22 | 298.14 |
| 23 | 2451352 | 1999-06-22 | 299.29 |
| 24 | 2451652 | 2000-04-17 | 298.43 |
| 25 | 2451942 | 2001-02-01 | 297.64 |
| 26 | 2452247 | 2001-12-03 | 298.4 |
| 27 | 2452541 | 2002-09-23 | 298.12 |
| 28 | 2452834 | 2003-07-13 | 297.81 |
| 29 | 2453135 | 2004-05-09 | 297.25 |
| 31 | 2453741 | 2006-01-05 | 297 |
| 32 | 2454033 | 2006-10-24 | 297.37 |
| 33 | 2454326 | 2007-08-13 | 297.06 |
| 34 | 2454619 | 2008-06-01 | 296.6 |
| 35 | 2454921 | 2009-03-30 | 297.36 |
| 36 | 2455212 | 2010-01-15 | 298.5 |
| 37 | 2455510 | 2010-11-09 | 299.5 |
| 38 | 2455815 | 2011-09-10 | 300.57 |
| 39 | 2456122 | 2012-07-13 | 301.14 |
| 40 | 2456416 | 2013-05-03 | 301.57 |
| 41 | 2456722 | 2014-03-05 | 301 |
| 42 | 2457026 | 2015-01-03 | 300.93 |
| 43 | 2457323 | 2015-10-27 | 301.44 |
| 44 | 2457621 | 2016-08-20 | 300.88 |
| 45 | 2457918 | 2017-06-13 | 299.75 |
| 47 | 2458533 | 2019-02-18 | 299.75 |
| 48 | 2458828 | 2019-12-10 | 300.46 |
| 49 | 2459124 | 2020-10-01 | 301.44 |
| 50 | 2459420 | 2021-07-24 | 299.64 |
| 51 | 2459725 | 2022-05-25 | 296.5 |
| 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. |