| E | O (JD) | O (dat) | Period |
| -93 | 2415648 | 1901-09-20 | 251.18 |
| -89 | 2416653 | 1904-06-21 | 251.19 |
| -86 | 2417433 | 1906-08-10 | 251.14 |
| -85 | 2417706 | 1907-05-10 | 251.48 |
| -70 | 2421444 | 1917-08-03 | 251.89 |
| -67 | 2422198 | 1919-08-27 | 251.41 |
| -64 | 2422949 | 1921-09-16 | 250.6 |
| -61 | 2423703 | 1923-10-10 | 251.33 |
| -60 | 2423963 | 1924-06-26 | 252.56 |
| -56 | 2424956 | 1927-03-16 | 251.95 |
| -55 | 2425219 | 1927-12-04 | 251.83 |
| -54 | 2425492 | 1928-09-02 | 253.11 |
| -51 | 2426232 | 1930-09-12 | 253.74 |
| -39 | 2429245 | 1938-12-12 | 253.66 |
| -38 | 2429495 | 1939-08-19 | 253.24 |
| -2 | 2438673 | 1964-10-04 | 253.18 |
| -1 | 2438918 | 1965-06-06 | 253.47 |
| 0 | 2439160 | 1966-02-03 | 253.7 |
| 1 | 2439407 | 1966-10-08 | 252.83 |
| 2 | 2439660 | 1967-06-18 | 248.95 |
| 4 | 2440150 | 1968-10-20 | 250.09 |
| 5 | 2440408 | 1969-07-05 | 251.92 |
| 8 | 2441160 | 1971-07-27 | 252 |
| 9 | 2441410 | 1972-04-02 | 252.07 |
| 11 | 2441920 | 1973-08-25 | 253.07 |
| 14 | 2442693 | 1975-10-07 | 253.25 |
| 17 | 2443430 | 1977-10-13 | 252.87 |
| 18 | 2443690 | 1978-06-30 | 252.66 |
| 21 | 2444460 | 1980-08-08 | 252.25 |
| 24 | 2445212 | 1982-08-30 | 252.09 |
| 25 | 2445450 | 1983-04-25 | 251.81 |
| 27 | 2445965 | 1984-09-21 | 250.56 |
| 30 | 2446720 | 1986-10-16 | 250.27 |
| 33 | 2447470 | 1988-11-04 | 250.8 |
| 34 | 2447708 | 1989-06-30 | 250.74 |
| 37 | 2448460 | 1991-07-22 | 249.86 |
| 38 | 2448720 | 1992-04-07 | 249.52 |
| 40 | 2449215 | 1993-08-15 | 250.01 |
| 43 | 2449973 | 1995-09-12 | 250.64 |
| 44 | 2450208 | 1996-05-04 | 251.29 |
| 46 | 2450719 | 1997-09-27 | 251.66 |
| 47 | 2450959 | 1998-05-25 | 252.36 |
| 49 | 2451475 | 1999-10-23 | 253.55 |
| 50 | 2451736 | 2000-07-10 | 254.05 |
| 52 | 2452239 | 2001-11-25 | 254.77 |
| 53 | 2452501 | 2002-08-14 | 255.59 |
| 54 | 2452751 | 2003-04-21 | 253.53 |
| 55 | 2453003 | 2003-12-29 | 252.24 |
| 56 | 2453261 | 2004-09-12 | 252.65 |
| 57 | 2453518 | 2005-05-27 | 253 |
| 59 | 2454003 | 2006-09-24 | 253 |
| 60 | 2454260 | 2007-06-08 | 252.35 |
| 62 | 2454775 | 2008-11-04 | 251.35 |
| 63 | 2455031 | 2009-07-18 | 251.85 |
| 65 | 2455530 | 2010-11-29 | 252.86 |
| 66 | 2455781 | 2011-08-07 | 252.29 |
| 67 | 2456025 | 2012-04-07 | 251.35 |
| 69 | 2456533 | 2013-08-28 | 251.45 |
| 71 | 2457040 | 2015-01-17 | 251.9 |
| 72 | 2457293 | 2015-09-27 | 252.4 |
| 73 | 2457540 | 2016-05-31 | 252.42 |
| 75 | 2458050 | 2017-10-23 | 251.77 |
| 76 | 2458299 | 2018-06-29 | 251.63 |
| 77 | 2458555 | 2019-03-12 | 251.38 |
| 78 | 2458799 | 2019-11-11 | 250.47 |
| 79 | 2459054 | 2020-07-23 | 249.97 |
| 80 | 2459305 | 2021-03-31 | 249.7 |
| 81 | 2459550 | 2021-12-01 | 249.82 |
| 82 | 2459797 | 2022-08-05 | 250.99 |
| 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. |