| E | O (JD) | O (dat) | Period |
| -62 | 2415900 | 1902-05-30 | 307.69 |
| -58 | 2417130 | 1905-10-11 | 307.83 |
| -57 | 2417430 | 1906-08-07 | 307.1 |
| -56 | 2417760 | 1907-07-03 | 306.64 |
| -55 | 2418055 | 1908-04-23 | 307.07 |
| -50 | 2419595 | 1912-07-11 | 308.27 |
| -49 | 2419890 | 1913-05-02 | 307.5 |
| -46 | 2420810 | 1915-11-08 | 305.97 |
| -45 | 2421125 | 1916-09-18 | 305.56 |
| -44 | 2421450 | 1917-08-09 | 304.72 |
| -43 | 2421735 | 1918-05-21 | 304.69 |
| -37 | 2423565 | 1923-05-25 | 304.62 |
| -32 | 2425085 | 1927-07-23 | 303.84 |
| -31 | 2425370 | 1928-05-03 | 304 |
| -28 | 2426299 | 1930-11-18 | 305.08 |
| -26 | 2426907 | 1932-07-18 | 306.03 |
| -25 | 2427214 | 1933-05-21 | 306.96 |
| -24 | 2427523 | 1934-03-26 | 307.31 |
| -20 | 2428760 | 1937-08-14 | 308.12 |
| -19 | 2429071 | 1938-06-21 | 308.83 |
| -18 | 2429365 | 1939-04-11 | 308.67 |
| -15 | 2430294 | 1941-10-26 | 308.9 |
| -14 | 2430615 | 1942-09-12 | 308.7 |
| -13 | 2430918 | 1943-07-12 | 309.05 |
| -12 | 2431227 | 1944-05-16 | 310.15 |
| -11 | 2431543 | 1945-03-28 | 310 |
| -8 | 2432462 | 1947-10-03 | 308.68 |
| -7 | 2432773 | 1948-08-09 | 308.39 |
| -6 | 2433089 | 1949-06-21 | 308.19 |
| -5 | 2433400 | 1950-04-28 | 308.48 |
| 18 | 2440480 | 1969-09-15 | 308.77 |
| 19 | 2440785 | 1970-07-17 | 308.66 |
| 20 | 2441093 | 1971-05-21 | 308.59 |
| 24 | 2442346 | 1974-10-25 | 308.88 |
| 25 | 2442650 | 1975-08-25 | 310.95 |
| 26 | 2442966 | 1976-07-06 | 311.41 |
| 27 | 2443273 | 1977-05-09 | 310.32 |
| 28 | 2443580 | 1978-03-12 | 309.75 |
| 30 | 2444215 | 1979-12-07 | 309.69 |
| 31 | 2444514 | 1980-10-01 | 309.47 |
| 32 | 2444821 | 1981-08-04 | 310.11 |
| 33 | 2445131 | 1982-06-10 | 309.53 |
| 34 | 2445440 | 1983-04-15 | 308.81 |
| 36 | 2446060 | 1984-12-25 | 309.69 |
| 37 | 2446375 | 1985-11-05 | 309.11 |
| 38 | 2446682 | 1986-09-08 | 307.73 |
| 39 | 2446988 | 1987-07-11 | 307 |
| 40 | 2447302 | 1988-05-20 | 306.05 |
| 44 | 2448523 | 1991-09-23 | 305.08 |
| 45 | 2448818 | 1992-07-14 | 304.75 |
| 46 | 2449129 | 1993-05-21 | 303.92 |
| 49 | 2450039 | 1995-11-17 | 303.1 |
| 50 | 2450340 | 1996-09-13 | 303.94 |
| 51 | 2450644 | 1997-07-14 | 304.28 |
| 52 | 2450940 | 1998-05-06 | 304.56 |
| 53 | 2451250 | 1999-03-12 | 305.64 |
| 54 | 2451562 | 2000-01-18 | 305.36 |
| 55 | 2451862 | 2000-11-13 | 306.21 |
| 56 | 2452179 | 2001-09-26 | 308 |
| 57 | 2452479 | 2002-07-23 | 307.5 |
| 58 | 2452780 | 2003-05-20 | 306.69 |
| 59 | 2453091 | 2004-03-26 | 306.56 |
| 61 | 2453719 | 2005-12-14 | 306.94 |
| 62 | 2454013 | 2006-10-04 | 307.33 |
| 63 | 2454318 | 2007-08-05 | 307 |
| 64 | 2454628 | 2008-06-10 | 306.21 |
| 65 | 2454941 | 2009-04-19 | 306.33 |
| 68 | 2455850 | 2011-10-15 | 306.78 |
| 69 | 2456161 | 2012-08-21 | 306.22 |
| 70 | 2456467 | 2013-06-23 | 305.61 |
| 71 | 2456779 | 2014-05-01 | 305.19 |
| 72 | 2457074 | 2015-02-20 | 305.21 |
| 73 | 2457384 | 2015-12-27 | 304.86 |
| 74 | 2457686 | 2016-10-24 | 304 |
| 75 | 2457988 | 2017-08-22 | 304 |
| 76 | 2458296 | 2018-06-26 | 304.5 |
| 77 | 2458600 | 2019-04-26 | 303.64 |
| 78 | 2458902 | 2020-02-22 | 303.56 |
| 79 | 2459207 | 2020-12-23 | 304 |
| 80 | 2459514 | 2021-10-26 | 303.17 |
| 81 | 2459807 | 2022-08-15 | 303 |
| 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. |