| E | O (JD) | O (dat) | Period |
| -69 | 2412120 | 1892-01-22 | 340.92 |
| -67 | 2412790 | 1893-11-22 | 341.12 |
| -66 | 2413150 | 1894-11-17 | 341.22 |
| -65 | 2413500 | 1895-11-02 | 341.88 |
| -57 | 2416214 | 1903-04-09 | 343.03 |
| -55 | 2416900 | 1905-02-23 | 343.47 |
| -53 | 2417580 | 1907-01-04 | 342.84 |
| -52 | 2417940 | 1907-12-30 | 343.74 |
| -51 | 2418290 | 1908-12-14 | 345.2 |
| -50 | 2418641 | 1909-11-30 | 345.86 |
| -49 | 2418980 | 1910-11-04 | 346.07 |
| -42 | 2421390 | 1917-06-10 | 344.64 |
| -40 | 2422080 | 1919-05-01 | 343.18 |
| -39 | 2422430 | 1920-04-15 | 342.11 |
| -38 | 2422780 | 1921-03-31 | 340.91 |
| -37 | 2423100 | 1922-02-14 | 341.67 |
| -36 | 2423440 | 1923-01-20 | 340.93 |
| -35 | 2423760 | 1923-12-06 | 337.11 |
| -34 | 2424110 | 1924-11-20 | 337.32 |
| -33 | 2424485 | 1925-11-30 | 339 |
| -32 | 2424798 | 1926-10-09 | 340.86 |
| -27 | 2426480 | 1931-05-18 | 341.36 |
| -26 | 2426821 | 1932-04-23 | 339.32 |
| -25 | 2427177 | 1933-04-14 | 338.59 |
| -24 | 2427522 | 1934-03-25 | 340.67 |
| -23 | 2427858 | 1935-02-24 | 343.5 |
| -22 | 2428202 | 1936-02-03 | 343 |
| -21 | 2428530 | 1936-12-27 | 342.93 |
| -20 | 2428880 | 1937-12-12 | 344.64 |
| -19 | 2429230 | 1938-11-27 | 345.36 |
| -18 | 2429570 | 1939-11-02 | 346 |
| -17 | 2429930 | 1940-10-27 | 346.82 |
| -16 | 2430275 | 1941-10-07 | 346.82 |
| -15 | 2430620 | 1942-09-17 | 347.73 |
| -10 | 2432340 | 1947-06-03 | 348.77 |
| -9 | 2432700 | 1948-05-28 | 348.18 |
| -8 | 2433040 | 1949-05-03 | 347.77 |
| -7 | 2433410 | 1950-05-08 | 348.78 |
| -6 | 2433763 | 1951-04-26 | 348.71 |
| -5 | 2434102 | 1952-03-30 | 346.57 |
| -4 | 2434444 | 1953-03-07 | 344 |
| -3 | 2434794 | 1954-02-20 | 341 |
| -2 | 2435128 | 1955-01-20 | 340.36 |
| -1 | 2435464 | 1955-12-22 | 341.71 |
| 0 | 2435802 | 1956-11-24 | 342.71 |
| 1 | 2436145 | 1957-11-02 | 342.79 |
| 2 | 2436485 | 1958-10-08 | 343.57 |
| 3 | 2436845 | 1959-10-03 | 343.79 |
| 11 | 2439590 | 1967-04-09 | 344.21 |
| 12 | 2439930 | 1968-03-14 | 344.46 |
| 13 | 2440282 | 1969-03-01 | 342.68 |
| 14 | 2440610 | 1970-01-23 | 340.36 |
| 15 | 2440975 | 1971-01-23 | 338.93 |
| 16 | 2441300 | 1971-12-14 | 338.5 |
| 17 | 2441625 | 1972-11-03 | 339.04 |
| 25 | 2444340 | 1980-04-10 | 338.39 |
| 26 | 2444670 | 1981-03-06 | 337.86 |
| 27 | 2445020 | 1982-02-19 | 338.75 |
| 28 | 2445365 | 1983-01-30 | 339.29 |
| 29 | 2445695 | 1983-12-26 | 339.29 |
| 30 | 2446040 | 1984-12-05 | 339.44 |
| 31 | 2446370 | 1985-10-31 | 339.32 |
| 32 | 2446720 | 1986-10-16 | 339.36 |
| 33 | 2447040 | 1987-09-01 | 339.73 |
| 38 | 2448760 | 1992-05-17 | 339.73 |
| 39 | 2449090 | 1993-04-12 | 339.95 |
| 40 | 2449436 | 1994-03-24 | 341 |
| 41 | 2449773 | 1995-02-24 | 341.33 |
| 42 | 2450111 | 1996-01-28 | 342 |
| 43 | 2450458 | 1997-01-09 | 343 |
| 44 | 2450804 | 1997-12-21 | 342.35 |
| 45 | 2451140 | 1998-11-22 | 341.39 |
| 47 | 2451840 | 2000-10-22 | 341.56 |
| 48 | 2452174 | 2001-09-21 | 341.72 |
| 50 | 2452855 | 2003-08-03 | 341.72 |
| 51 | 2453174 | 2004-06-17 | 341.35 |
| 52 | 2453543 | 2005-06-21 | 340.5 |
| 53 | 2453870 | 2006-05-14 | 341.53 |
| 54 | 2454225 | 2007-05-04 | 343.36 |
| 55 | 2454558 | 2008-04-01 | 342.93 |
| 56 | 2454904 | 2009-03-13 | 342.21 |
| 57 | 2455248 | 2010-02-20 | 342.07 |
| 58 | 2455588 | 2011-01-26 | 341.93 |
| 59 | 2455930 | 2012-01-03 | 343.43 |
| 60 | 2456274 | 2012-12-12 | 342.71 |
| 61 | 2456610 | 2013-11-13 | 343.93 |
| 62 | 2456960 | 2014-10-29 | 347.21 |
| 63 | 2457310 | 2015-10-14 | 345.64 |
| 64 | 2457640 | 2016-09-08 | 343.57 |
| 65 | 2458011 | 2017-09-14 | 343.86 |
| 66 | 2458368 | 2018-09-06 | 344.14 |
| 67 | 2458675 | 2019-07-10 | 346.02 |
| 68 | 2459019 | 2020-06-18 | 344.14 |
| 69 | 2459365 | 2021-05-30 | 335.33 |
| 70 | 2459723 | 2022-05-23 | 331 |
| 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. |