| E | O (JD) | O (dat) | Period |
| -69 | 2416895 | 1905-02-18 | 257.59 |
| -66 | 2417647 | 1907-03-12 | 255.04 |
| -63 | 2418416 | 1909-04-19 | 252.06 |
| -60 | 2419167 | 1911-05-10 | 253.18 |
| -59 | 2419448 | 1912-02-15 | 254.38 |
| -57 | 2419930 | 1913-06-11 | 254.79 |
| -50 | 2421690 | 1918-04-06 | 254.58 |
| -38 | 2424760 | 1926-09-01 | 254.15 |
| -37 | 2425045 | 1927-06-13 | 254.25 |
| -36 | 2425286 | 1928-02-09 | 255.04 |
| -34 | 2425790 | 1929-06-27 | 255.14 |
| -30 | 2426803 | 1932-04-05 | 253.97 |
| -29 | 2427067 | 1932-12-25 | 253.44 |
| -27 | 2427560 | 1934-05-02 | 254.03 |
| -26 | 2427820 | 1935-01-17 | 253.74 |
| -20 | 2429350 | 1939-03-27 | 253.06 |
| -19 | 2429598 | 1939-11-30 | 253.05 |
| -17 | 2430115 | 1941-04-30 | 252.64 |
| -13 | 2431105 | 1944-01-15 | 252.62 |
| -10 | 2431875 | 1946-02-23 | 252.85 |
| -7 | 2432621 | 1948-03-10 | 252.9 |
| -4 | 2433370 | 1950-03-29 | 253.26 |
| 22 | 2439968 | 1968-04-21 | 253.49 |
| 25 | 2440725 | 1970-05-18 | 253.56 |
| 32 | 2442508 | 1975-04-05 | 253.85 |
| 35 | 2443278 | 1977-05-14 | 254.3 |
| 36 | 2443530 | 1978-01-21 | 255.03 |
| 38 | 2444040 | 1979-06-15 | 254.92 |
| 39 | 2444290 | 1980-02-20 | 255.06 |
| 40 | 2444560 | 1980-11-16 | 255.75 |
| 41 | 2444804 | 1981-07-18 | 255.53 |
| 42 | 2445057 | 1982-03-28 | 255.14 |
| 43 | 2445320 | 1982-12-16 | 254.57 |
| 44 | 2445580 | 1983-09-02 | 254.43 |
| 45 | 2445823 | 1984-05-02 | 255.36 |
| 46 | 2446079 | 1985-01-13 | 254.14 |
| 47 | 2446335 | 1985-09-26 | 253.36 |
| 48 | 2446591 | 1986-06-09 | 254.64 |
| 49 | 2446845 | 1987-02-18 | 255 |
| 50 | 2447090 | 1987-10-21 | 254.43 |
| 51 | 2447357 | 1988-07-14 | 254.29 |
| 52 | 2447611 | 1989-03-25 | 254.64 |
| 53 | 2447861 | 1989-11-30 | 255.71 |
| 54 | 2448115 | 1990-08-11 | 255.14 |
| 55 | 2448371 | 1991-04-24 | 253.5 |
| 56 | 2448630 | 1992-01-08 | 253.29 |
| 57 | 2448885 | 1992-09-19 | 253.43 |
| 58 | 2449134 | 1993-05-26 | 254.07 |
| 59 | 2449383 | 1994-01-30 | 254.14 |
| 60 | 2449635 | 1994-10-09 | 253.57 |
| 61 | 2449889 | 1995-06-20 | 253.79 |
| 62 | 2450154 | 1996-03-11 | 254.64 |
| 63 | 2450405 | 1996-11-17 | 255.21 |
| 64 | 2450660 | 1997-07-30 | 254.93 |
| 65 | 2450912 | 1998-04-08 | 254.07 |
| 66 | 2451170 | 1998-12-22 | 253.29 |
| 67 | 2451421 | 1999-08-30 | 253.36 |
| 68 | 2451672 | 2000-05-07 | 253.71 |
| 69 | 2451928 | 2001-01-18 | 253.71 |
| 70 | 2452177 | 2001-09-24 | 253.79 |
| 71 | 2452435 | 2002-06-09 | 254 |
| 72 | 2452689 | 2003-02-18 | 254.29 |
| 73 | 2452945 | 2003-11-01 | 254.57 |
| 74 | 2453199 | 2004-07-12 | 253.64 |
| 75 | 2453450 | 2005-03-20 | 252.86 |
| 76 | 2453710 | 2005-12-05 | 252.57 |
| 77 | 2453959 | 2006-08-11 | 252.86 |
| 78 | 2454204 | 2007-04-13 | 253.79 |
| 79 | 2454460 | 2007-12-25 | 253.93 |
| 80 | 2454710 | 2008-08-31 | 253.21 |
| 81 | 2454974 | 2009-05-22 | 253.29 |
| 82 | 2455228 | 2010-01-31 | 253.64 |
| 83 | 2455487 | 2010-10-17 | 253.36 |
| 84 | 2455727 | 2011-06-14 | 253.14 |
| 85 | 2455982 | 2012-02-24 | 252.36 |
| 86 | 2456233 | 2012-11-01 | 251.21 |
| 87 | 2456484 | 2013-07-10 | 251.5 |
| 88 | 2456744 | 2014-03-27 | 251.79 |
| 89 | 2456991 | 2014-11-29 | 251.07 |
| 90 | 2457241 | 2015-08-06 | 252.21 |
| 91 | 2457494 | 2016-04-15 | 252.64 |
| 92 | 2457740 | 2016-12-17 | 252.29 |
| 93 | 2457990 | 2017-08-24 | 253.57 |
| 94 | 2458258 | 2018-05-19 | 254.36 |
| 95 | 2458507 | 2019-01-23 | 255 |
| 96 | 2458760 | 2019-10-03 | 255.57 |
| 97 | 2459022 | 2020-06-21 | 254.78 |
| 98 | 2459274 | 2021-02-28 | 254.37 |
| 99 | 2459530 | 2021-11-11 | 255.83 |
| 100 | 2459778 | 2022-07-17 | 256.4 |
| 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. |