| E | O (JD) | O (dat) | Period |
| -91 | 2415820 | 1902-03-11 | 322.15 |
| -90 | 2416154 | 1903-02-08 | 322.79 |
| -89 | 2416475 | 1903-12-26 | 322.64 |
| -88 | 2416815 | 1904-11-30 | 323.58 |
| -83 | 2418410 | 1909-04-13 | 323.26 |
| -82 | 2418741 | 1910-03-10 | 322.84 |
| -81 | 2419052 | 1911-01-15 | 322.94 |
| -80 | 2419392 | 1911-12-21 | 323.18 |
| -74 | 2421310 | 1917-03-22 | 322.86 |
| -73 | 2421650 | 1918-02-25 | 322.38 |
| -72 | 2421974 | 1919-01-15 | 321.76 |
| -71 | 2422300 | 1919-12-07 | 321 |
| -65 | 2424214 | 1925-03-04 | 320.41 |
| -64 | 2424540 | 1926-01-24 | 320.24 |
| -63 | 2424844 | 1926-11-24 | 320.42 |
| -57 | 2426772 | 1932-03-05 | 320.05 |
| -56 | 2427082 | 1933-01-09 | 320.12 |
| -55 | 2427430 | 1933-12-23 | 319.78 |
| -50 | 2429020 | 1938-05-01 | 319.65 |
| -49 | 2429336 | 1939-03-13 | 320.45 |
| -48 | 2429662 | 1940-02-02 | 319.87 |
| -47 | 2429955 | 1940-11-21 | 318.93 |
| -42 | 2431570 | 1945-04-24 | 320.11 |
| -40 | 2432218 | 1947-02-01 | 320.54 |
| -39 | 2432530 | 1947-12-10 | 321.17 |
| -38 | 2432850 | 1948-10-25 | 321.59 |
| -25 | 2437030 | 1960-04-05 | 321.41 |
| -24 | 2437354 | 1961-02-23 | 321.44 |
| -23 | 2437679 | 1962-01-14 | 321.41 |
| -22 | 2437996 | 1962-11-27 | 320.91 |
| -21 | 2438327 | 1963-10-24 | 319.95 |
| -17 | 2439600 | 1967-04-19 | 320.12 |
| -16 | 2439922 | 1968-03-06 | 320.25 |
| -15 | 2440227 | 1969-01-05 | 319.96 |
| -14 | 2440556 | 1969-11-30 | 319.72 |
| -9 | 2442160 | 1974-04-22 | 320.14 |
| -8 | 2442482 | 1975-03-10 | 321.18 |
| -7 | 2442800 | 1976-01-22 | 321.61 |
| -6 | 2443120 | 1976-12-07 | 320.7 |
| -5 | 2443445 | 1977-10-28 | 320.62 |
| -4 | 2443770 | 1978-09-18 | 320.87 |
| -2 | 2444410 | 1980-06-19 | 320.25 |
| -1 | 2444720 | 1981-04-25 | 320.31 |
| 0 | 2445052 | 1982-03-23 | 319.69 |
| 1 | 2445364 | 1983-01-29 | 318.94 |
| 2 | 2445680 | 1983-12-11 | 319.69 |
| 3 | 2446010 | 1984-11-05 | 319.69 |
| 4 | 2446320 | 1985-09-11 | 319.31 |
| 6 | 2446963 | 1987-06-16 | 320.5 |
| 7 | 2447282 | 1988-04-30 | 321.31 |
| 8 | 2447605 | 1989-03-19 | 321.19 |
| 9 | 2447920 | 1990-01-28 | 322.13 |
| 10 | 2448252 | 1990-12-26 | 323.33 |
| 11 | 2448579 | 1991-11-18 | 323.5 |
| 12 | 2448890 | 1992-09-24 | 324.31 |
| 13 | 2449225 | 1993-08-25 | 324.5 |
| 15 | 2449870 | 1995-06-01 | 324 |
| 16 | 2450193 | 1996-04-19 | 324.69 |
| 17 | 2450521 | 1997-03-13 | 324.5 |
| 18 | 2450843 | 1998-01-29 | 323 |
| 19 | 2451172 | 1998-12-24 | 323.2 |
| 20 | 2451492 | 1999-11-09 | 324.38 |
| 21 | 2451815 | 2000-09-27 | 324.69 |
| 22 | 2452125 | 2001-08-03 | 324.19 |
| 24 | 2452786 | 2003-05-26 | 323 |
| 25 | 2453118 | 2004-04-22 | 322.63 |
| 26 | 2453441 | 2005-03-11 | 323.31 |
| 27 | 2453761 | 2006-01-25 | 323.13 |
| 28 | 2454071 | 2006-12-01 | 321.29 |
| 29 | 2454398 | 2007-10-24 | 320.36 |
| 30 | 2454715 | 2008-09-05 | 320.86 |
| 31 | 2455043 | 2009-07-30 | 322.29 |
| 32 | 2455359 | 2010-06-11 | 323.79 |
| 33 | 2455685 | 2011-05-03 | 324.36 |
| 34 | 2456009 | 2012-03-22 | 324.07 |
| 35 | 2456335 | 2013-02-11 | 325.07 |
| 36 | 2456667 | 2014-01-09 | 327.21 |
| 37 | 2456987 | 2014-11-25 | 327 |
| 38 | 2457308 | 2015-10-12 | 326.14 |
| 39 | 2457645 | 2016-09-13 | 326.64 |
| 40 | 2457980 | 2017-08-14 | 327.64 |
| 41 | 2458292 | 2018-06-22 | 328.07 |
| 42 | 2458618 | 2019-05-14 | 327.86 |
| 43 | 2458957 | 2020-04-17 | 326.63 |
| 44 | 2459284 | 2021-03-10 | 326.97 |
| 45 | 2459604 | 2022-01-24 | 330.33 |
| 46 | 2459939 | 2022-12-25 | 331.2 |
| 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. |