| E | O (JD) | O (dat) | Period |
| -83 | 2414940 | 1899-10-12 | 331.89 |
| -82 | 2415260 | 1900-08-28 | 332.92 |
| -80 | 2415930 | 1902-06-29 | 334.14 |
| -79 | 2416280 | 1903-06-14 | 334.77 |
| -77 | 2416930 | 1905-03-25 | 335.15 |
| -73 | 2418270 | 1908-11-24 | 335.22 |
| -70 | 2419280 | 1911-08-31 | 335.17 |
| -69 | 2419628 | 1912-08-13 | 335.96 |
| -68 | 2419956 | 1913-07-07 | 336.76 |
| -66 | 2420620 | 1915-05-02 | 336.63 |
| -64 | 2421310 | 1917-03-22 | 335.59 |
| -61 | 2422315 | 1919-12-22 | 336.05 |
| -60 | 2422651 | 1920-11-22 | 336.48 |
| -59 | 2422978 | 1921-10-15 | 334.79 |
| -58 | 2423313 | 1922-09-15 | 333 |
| -57 | 2423664 | 1923-09-01 | 331.71 |
| -56 | 2423978 | 1924-07-11 | 331.82 |
| -55 | 2424313 | 1925-06-11 | 332.1 |
| -54 | 2424640 | 1926-05-04 | 330.95 |
| -53 | 2424970 | 1927-03-30 | 331.55 |
| -49 | 2426300 | 1930-11-19 | 331.8 |
| -48 | 2426633 | 1931-10-18 | 330.65 |
| -47 | 2426963 | 1932-09-12 | 330.45 |
| -46 | 2427310 | 1933-08-25 | 329.76 |
| -45 | 2427617 | 1934-06-28 | 329.18 |
| -44 | 2427949 | 1935-05-26 | 329.18 |
| -43 | 2428270 | 1936-04-11 | 329.32 |
| -38 | 2429925 | 1940-10-22 | 329.81 |
| -37 | 2430250 | 1941-09-12 | 331.68 |
| -36 | 2430588 | 1942-08-16 | 332.77 |
| -35 | 2430930 | 1943-07-24 | 333.61 |
| -34 | 2431253 | 1944-06-11 | 336.8 |
| -33 | 2431610 | 1945-06-03 | 337.28 |
| -32 | 2431930 | 1946-04-19 | 336.54 |
| -31 | 2432270 | 1947-03-25 | 335.99 |
| -8 | 2440030 | 1968-06-22 | 335.84 |
| -7 | 2440370 | 1969-05-28 | 335.78 |
| -1 | 2442350 | 1974-10-29 | 336.03 |
| 0 | 2442680 | 1975-09-24 | 335.37 |
| 1 | 2443020 | 1976-08-29 | 333.84 |
| 2 | 2443353 | 1977-07-28 | 335.41 |
| 3 | 2443697 | 1978-07-07 | 337.5 |
| 4 | 2444030 | 1979-06-05 | 337 |
| 7 | 2445050 | 1982-03-21 | 336.7 |
| 9 | 2445720 | 1984-01-20 | 337.15 |
| 10 | 2446060 | 1984-12-25 | 336.65 |
| 11 | 2446380 | 1985-11-10 | 335.84 |
| 12 | 2446727 | 1986-10-23 | 335.34 |
| 13 | 2447066 | 1987-09-27 | 334.85 |
| 14 | 2447394 | 1988-08-20 | 335.28 |
| 15 | 2447731 | 1989-07-23 | 334.85 |
| 16 | 2448069 | 1990-06-26 | 333.71 |
| 17 | 2448399 | 1991-05-22 | 333.71 |
| 18 | 2448735 | 1992-04-22 | 332.64 |
| 19 | 2449060 | 1993-03-13 | 332.93 |
| 20 | 2449405 | 1994-02-21 | 333.87 |
| 21 | 2449727 | 1995-01-09 | 333.8 |
| 22 | 2450055 | 1995-12-03 | 334.65 |
| 23 | 2450406 | 1996-11-18 | 334.92 |
| 24 | 2450736 | 1997-10-14 | 336.14 |
| 25 | 2451071 | 1998-09-14 | 338.07 |
| 26 | 2451409 | 1999-08-18 | 337 |
| 27 | 2451745 | 2000-07-19 | 337.14 |
| 28 | 2452093 | 2001-07-02 | 338 |
| 29 | 2452422 | 2002-05-27 | 338.5 |
| 30 | 2452757 | 2003-04-27 | 339.01 |
| 31 | 2453105 | 2004-04-09 | 338.72 |
| 32 | 2453434 | 2005-03-04 | 339.71 |
| 33 | 2453785 | 2006-02-18 | 340.21 |
| 34 | 2454115 | 2007-01-14 | 338.71 |
| 35 | 2454465 | 2007-12-30 | 338.35 |
| 36 | 2454806 | 2008-12-05 | 337.92 |
| 37 | 2455136 | 2009-10-31 | 337.42 |
| 38 | 2455468 | 2010-09-28 | 337.15 |
| 39 | 2455808 | 2011-09-03 | 334.72 |
| 40 | 2456142 | 2012-08-02 | 333.8 |
| 41 | 2456482 | 2013-07-08 | 334.43 |
| 42 | 2456818 | 2014-06-09 | 334.21 |
| 43 | 2457139 | 2015-04-26 | 333.21 |
| 44 | 2457476 | 2016-03-28 | 332.35 |
| 45 | 2457810 | 2017-02-25 | 332.64 |
| 46 | 2458145 | 2018-01-26 | 333.85 |
| 47 | 2458470 | 2018-12-17 | 334.5 |
| 48 | 2458807 | 2019-11-19 | 334.22 |
| 49 | 2459150 | 2020-10-27 | 333.58 |
| 50 | 2459481 | 2021-09-23 | 335.43 |
| 51 | 2459817 | 2022-08-25 | 337.51 |
| 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. |