| E | O (JD) | O (dat) | Period |
| -69 | 2412140 | 1892-02-11 | 316.71 |
| -68 | 2412480 | 1893-01-16 | 316.89 |
| -62 | 2414360 | 1898-03-11 | 316.8 |
| -60 | 2415004 | 1899-12-15 | 316.39 |
| -58 | 2415645 | 1901-09-17 | 315.97 |
| -56 | 2416260 | 1903-05-25 | 315.84 |
| -55 | 2416590 | 1904-04-19 | 315.13 |
| -54 | 2416900 | 1905-02-23 | 315.28 |
| -52 | 2417520 | 1906-11-05 | 315.42 |
| -48 | 2418780 | 1910-04-18 | 316.05 |
| -47 | 2419100 | 1911-03-04 | 316.49 |
| -46 | 2419410 | 1912-01-08 | 316.73 |
| -45 | 2419740 | 1912-12-03 | 317.49 |
| -39 | 2421640 | 1918-02-15 | 317.85 |
| -38 | 2421970 | 1919-01-11 | 318.69 |
| -37 | 2422275 | 1919-11-12 | 318.29 |
| -32 | 2423865 | 1924-03-20 | 317.55 |
| -31 | 2424198 | 1925-02-16 | 316.65 |
| -30 | 2424500 | 1925-12-15 | 315.65 |
| -29 | 2424858 | 1926-12-08 | 314.85 |
| -28 | 2425125 | 1927-09-01 | 314.89 |
| -25 | 2426060 | 1930-03-24 | 314.84 |
| -24 | 2426380 | 1931-02-07 | 315.08 |
| -23 | 2426689 | 1931-12-13 | 315.59 |
| -22 | 2427010 | 1932-10-29 | 315.85 |
| -17 | 2428600 | 1937-03-07 | 317.59 |
| -16 | 2428930 | 1938-01-31 | 317.96 |
| -15 | 2429242 | 1938-12-09 | 317.48 |
| -14 | 2429555 | 1939-10-18 | 317.86 |
| -13 | 2429875 | 1940-09-02 | 318.1 |
| -12 | 2430196 | 1941-07-20 | 319 |
| -9 | 2431140 | 1944-02-19 | 318.41 |
| -8 | 2431445 | 1944-12-20 | 318.24 |
| -7 | 2431790 | 1945-11-30 | 316.73 |
| -6 | 2432115 | 1946-10-21 | 316.63 |
| -2 | 2433400 | 1950-04-28 | 316.56 |
| -1 | 2433685 | 1951-02-07 | 316.63 |
| 0 | 2434000 | 1951-12-19 | 316.59 |
| 20 | 2440320 | 1969-04-08 | 316.28 |
| 21 | 2440650 | 1970-03-04 | 316.1 |
| 22 | 2440966 | 1971-01-14 | 316.08 |
| 23 | 2441295 | 1971-12-09 | 316.4 |
| 24 | 2441610 | 1972-10-19 | 316.26 |
| 26 | 2442230 | 1974-07-01 | 315.08 |
| 27 | 2442535 | 1975-05-02 | 313.66 |
| 28 | 2442860 | 1976-03-22 | 312.4 |
| 29 | 2443167 | 1977-01-23 | 312.17 |
| 30 | 2443484 | 1977-12-06 | 312.69 |
| 31 | 2443800 | 1978-10-18 | 313.32 |
| 33 | 2444415 | 1980-06-24 | 314.1 |
| 34 | 2444715 | 1981-04-20 | 314.25 |
| 35 | 2445050 | 1982-03-21 | 314.09 |
| 36 | 2445367 | 1983-02-01 | 313.65 |
| 37 | 2445680 | 1983-12-11 | 314.33 |
| 38 | 2446005 | 1984-10-31 | 314.67 |
| 39 | 2446315 | 1985-09-06 | 314.05 |
| 41 | 2446925 | 1987-05-09 | 313.44 |
| 42 | 2447236 | 1988-03-15 | 313.04 |
| 43 | 2447572 | 1989-02-14 | 313.04 |
| 44 | 2447875 | 1989-12-14 | 313.3 |
| 45 | 2448180 | 1990-10-15 | 314.2 |
| 46 | 2448510 | 1991-09-10 | 315.09 |
| 49 | 2449437 | 1994-03-25 | 315.94 |
| 50 | 2449755 | 1995-02-06 | 315.87 |
| 51 | 2450077 | 1995-12-25 | 316.87 |
| 52 | 2450398 | 1996-11-10 | 317.61 |
| 53 | 2450715 | 1997-09-23 | 317.91 |
| 54 | 2451052 | 1998-08-26 | 319.2 |
| 55 | 2451350 | 1999-06-20 | 319.36 |
| 56 | 2451673 | 2000-05-08 | 319.69 |
| 57 | 2451993 | 2001-03-24 | 319.83 |
| 58 | 2452311 | 2002-02-05 | 320.01 |
| 59 | 2452628 | 2002-12-19 | 319.3 |
| 60 | 2452957 | 2003-11-13 | 319.09 |
| 61 | 2453283 | 2004-10-04 | 318.65 |
| 62 | 2453598 | 2005-08-15 | 317.58 |
| 63 | 2453918 | 2006-07-01 | 316.27 |
| 64 | 2454222 | 2007-05-01 | 314.63 |
| 65 | 2454530 | 2008-03-04 | 313.74 |
| 66 | 2454863 | 2009-01-31 | 313.58 |
| 67 | 2455164 | 2009-11-28 | 314.46 |
| 68 | 2455473 | 2010-10-03 | 314.28 |
| 69 | 2455780 | 2011-08-06 | 313.91 |
| 70 | 2456110 | 2012-07-01 | 313.58 |
| 72 | 2456740 | 2014-03-23 | 312.97 |
| 73 | 2457067 | 2015-02-13 | 313.04 |
| 74 | 2457360 | 2015-12-03 | 312.12 |
| 75 | 2457661 | 2016-09-29 | 311.27 |
| 76 | 2457982 | 2017-08-16 | 309.66 |
| 77 | 2458294 | 2018-06-24 | 310.01 |
| 78 | 2458602 | 2019-04-28 | 309.9 |
| 79 | 2458901 | 2020-02-21 | 311.12 |
| 80 | 2459219 | 2021-01-04 | 311.57 |
| 81 | 2459523 | 2021-11-04 | 311.04 |
| 82 | 2459860 | 2022-10-07 | 311.74 |
| 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. |