| E | O (JD) | O (dat) | Period |
| -82 | 2414885 | 1899-08-18 | 343.8 |
| -81 | 2415230 | 1900-07-29 | 344.66 |
| -80 | 2415575 | 1901-07-09 | 347.16 |
| -79 | 2415928 | 1902-06-27 | 346.75 |
| -78 | 2416264 | 1903-05-29 | 346.43 |
| -77 | 2416613 | 1904-05-12 | 345.74 |
| -76 | 2416970 | 1905-05-04 | 344.75 |
| -75 | 2417305 | 1906-04-04 | 344.64 |
| -74 | 2417660 | 1907-03-25 | 344.42 |
| -67 | 2420060 | 1913-10-19 | 343.56 |
| -64 | 2421096 | 1916-08-20 | 343.33 |
| -63 | 2421435 | 1917-07-25 | 343.29 |
| -61 | 2422119 | 1919-06-09 | 343.24 |
| -58 | 2423145 | 1922-03-31 | 343.37 |
| -57 | 2423490 | 1923-03-11 | 343.17 |
| -48 | 2426580 | 1931-08-26 | 343 |
| -47 | 2426929 | 1932-08-09 | 342.97 |
| -46 | 2427275 | 1933-07-21 | 343 |
| -45 | 2427610 | 1934-06-21 | 342.96 |
| -44 | 2427949 | 1935-05-26 | 341.32 |
| -43 | 2428290 | 1936-05-01 | 338.38 |
| -42 | 2428635 | 1937-04-11 | 337.46 |
| -41 | 2428980 | 1938-03-22 | 337.75 |
| -38 | 2429990 | 1940-12-26 | 337.79 |
| -34 | 2431320 | 1944-08-17 | 337.67 |
| -33 | 2431664 | 1945-07-27 | 337.12 |
| -32 | 2432001 | 1946-06-29 | 339.82 |
| -31 | 2432345 | 1947-06-08 | 341.27 |
| -30 | 2432684 | 1948-05-12 | 341.6 |
| -29 | 2433022 | 1949-04-15 | 341.43 |
| -5 | 2441240 | 1971-10-15 | 341.32 |
| -4 | 2441570 | 1972-09-09 | 341.48 |
| -3 | 2441910 | 1973-08-15 | 341.7 |
| -2 | 2442241 | 1974-07-12 | 341.51 |
| -1 | 2442584 | 1975-06-20 | 341.78 |
| 0 | 2442934 | 1976-06-04 | 342.92 |
| 1 | 2443274 | 1977-05-10 | 343.71 |
| 2 | 2443624 | 1978-04-25 | 344.14 |
| 3 | 2443971 | 1979-04-07 | 343.79 |
| 4 | 2444310 | 1980-03-11 | 343.79 |
| 5 | 2444653 | 1981-02-17 | 343.15 |
| 6 | 2444990 | 1982-01-20 | 342.86 |
| 7 | 2445341 | 1983-01-06 | 343.57 |
| 8 | 2445680 | 1983-12-11 | 344.06 |
| 9 | 2446022 | 1984-11-17 | 344.56 |
| 10 | 2446373 | 1985-11-03 | 344.35 |
| 11 | 2446718 | 1986-10-14 | 345 |
| 12 | 2447062 | 1987-09-23 | 346.43 |
| 13 | 2447405 | 1988-08-31 | 346.21 |
| 14 | 2447747 | 1989-08-08 | 346.29 |
| 15 | 2448104 | 1990-07-31 | 347.58 |
| 16 | 2448448 | 1991-07-10 | 348.08 |
| 17 | 2448794 | 1992-06-20 | 348.5 |
| 18 | 2449145 | 1993-06-06 | 347.99 |
| 19 | 2449501 | 1994-05-28 | 346.85 |
| 20 | 2449839 | 1995-05-01 | 346.99 |
| 21 | 2450192 | 1996-04-18 | 346.64 |
| 22 | 2450531 | 1997-03-23 | 345.43 |
| 23 | 2450877 | 1998-03-04 | 344.64 |
| 24 | 2451223 | 1999-02-13 | 344.86 |
| 25 | 2451569 | 2000-01-25 | 344.94 |
| 26 | 2451913 | 2001-01-03 | 345.15 |
| 27 | 2452252 | 2001-12-08 | 345.71 |
| 28 | 2452607 | 2002-11-28 | 345.64 |
| 29 | 2452945 | 2003-11-01 | 344.78 |
| 30 | 2453295 | 2004-10-16 | 345.64 |
| 31 | 2453645 | 2005-10-01 | 346.43 |
| 32 | 2453986 | 2006-09-07 | 346.36 |
| 33 | 2454323 | 2007-08-10 | 346.14 |
| 34 | 2454681 | 2008-08-02 | 345.72 |
| 35 | 2455028 | 2009-07-15 | 345.65 |
| 36 | 2455373 | 2010-06-25 | 346.01 |
| 37 | 2455713 | 2011-05-31 | 345.57 |
| 38 | 2456067 | 2012-05-19 | 344.21 |
| 39 | 2456403 | 2013-04-20 | 343.06 |
| 40 | 2456750 | 2014-04-02 | 341.92 |
| 41 | 2457092 | 2015-03-10 | 341.07 |
| 42 | 2457436 | 2016-02-17 | 339.86 |
| 43 | 2457768 | 2017-01-14 | 339.21 |
| 44 | 2458105 | 2017-12-17 | 338.72 |
| 45 | 2458450 | 2018-11-27 | 337.72 |
| 46 | 2458778 | 2019-10-21 | 337.55 |
| 47 | 2459124 | 2020-10-01 | 338.62 |
| 48 | 2459460 | 2021-09-02 | 337.33 |
| 49 | 2459796 | 2022-08-04 | 335.79 |
| 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. |