| E | O (JD) | O (dat) | Period |
| -90 | 2411277 | 1889-10-01 | 460.96 |
| -88 | 2412209 | 1892-04-20 | 461.56 |
| -87 | 2412650 | 1893-07-05 | 463.51 |
| -86 | 2413090 | 1894-09-18 | 462.49 |
| -82 | 2414957 | 1899-10-29 | 461.26 |
| -80 | 2415887 | 1902-05-17 | 462.36 |
| -79 | 2416368 | 1903-09-10 | 463.83 |
| -76 | 2417735 | 1907-06-08 | 464.41 |
| -75 | 2418205 | 1908-09-20 | 463.85 |
| -72 | 2419600 | 1912-07-16 | 462.5 |
| -71 | 2420055 | 1913-10-14 | 462.42 |
| -68 | 2421460 | 1917-08-19 | 462.91 |
| -67 | 2421908 | 1918-11-10 | 461.6 |
| -66 | 2422372 | 1920-02-17 | 460.11 |
| -65 | 2422829 | 1921-05-19 | 459.5 |
| -64 | 2423295 | 1922-08-28 | 459.79 |
| -63 | 2423742 | 1923-11-18 | 459.64 |
| -62 | 2424195 | 1925-02-13 | 458.36 |
| -61 | 2424672 | 1926-06-05 | 460.21 |
| -60 | 2425133 | 1927-09-09 | 462.43 |
| -59 | 2425582 | 1928-12-01 | 462.14 |
| -58 | 2426036 | 1930-02-28 | 461.07 |
| -57 | 2426531 | 1931-07-08 | 460.43 |
| -56 | 2426980 | 1932-09-29 | 461.57 |
| -55 | 2427427 | 1933-12-20 | 463.43 |
| -54 | 2427895 | 1935-04-02 | 461.71 |
| -53 | 2428356 | 1936-07-06 | 460.64 |
| -52 | 2428821 | 1937-10-14 | 463.86 |
| -51 | 2429285 | 1939-01-21 | 466.13 |
| -50 | 2429746 | 1940-04-26 | 466.62 |
| -49 | 2430214 | 1941-08-07 | 466.38 |
| -48 | 2430687 | 1942-11-23 | 466 |
| -46 | 2431627 | 1945-06-20 | 466.5 |
| -45 | 2432090 | 1946-09-26 | 466.44 |
| -44 | 2432549 | 1947-12-29 | 464.31 |
| -43 | 2433013 | 1949-04-06 | 461.67 |
| -42 | 2433482 | 1950-07-19 | 459.86 |
| -41 | 2433941 | 1951-10-21 | 458.93 |
| -40 | 2434389 | 1953-01-11 | 457.64 |
| -39 | 2434850 | 1954-04-17 | 455.86 |
| -38 | 2435305 | 1955-07-16 | 454.5 |
| -37 | 2435759 | 1956-10-12 | 455.86 |
| -36 | 2436210 | 1958-01-06 | 457.57 |
| -35 | 2436667 | 1959-04-08 | 458.29 |
| -34 | 2437119 | 1960-07-03 | 460.14 |
| -33 | 2437593 | 1961-10-20 | 460.93 |
| -32 | 2438052 | 1963-01-22 | 461.71 |
| -31 | 2438519 | 1964-05-03 | 463.86 |
| -30 | 2438987 | 1965-08-14 | 464.07 |
| -29 | 2439435 | 1966-11-05 | 463.5 |
| -28 | 2439906 | 1968-02-19 | 464.79 |
| -27 | 2440374 | 1969-06-01 | 465.07 |
| -26 | 2440835 | 1970-09-05 | 466.43 |
| -25 | 2441299 | 1971-12-13 | 467.07 |
| -24 | 2441779 | 1973-04-06 | 465.21 |
| -23 | 2442238 | 1974-07-09 | 467.5 |
| -22 | 2442714 | 1975-10-28 | 470.57 |
| -21 | 2443166 | 1977-01-22 | 469.43 |
| -20 | 2443627 | 1978-04-28 | 468.79 |
| -19 | 2444127 | 1979-09-10 | 468.93 |
| -18 | 2444595 | 1980-12-21 | 469.79 |
| -17 | 2445055 | 1982-03-26 | 471.14 |
| -16 | 2445525 | 1983-07-09 | 468.36 |
| -15 | 2445992 | 1984-10-18 | 464.43 |
| -14 | 2446465 | 1986-02-03 | 465.21 |
| -13 | 2446924 | 1987-05-08 | 466.36 |
| -12 | 2447387 | 1988-08-13 | 464.57 |
| -11 | 2447837 | 1989-11-06 | 463.57 |
| -10 | 2448326 | 1991-03-10 | 463.36 |
| -9 | 2448783 | 1992-06-09 | 463.64 |
| -8 | 2449238 | 1993-09-07 | 465.36 |
| -7 | 2449709 | 1994-12-22 | 465 |
| -6 | 2450167 | 1996-03-24 | 464.36 |
| -5 | 2450635 | 1997-07-05 | 466.71 |
| -4 | 2451104 | 1998-10-17 | 467.64 |
| -3 | 2451569 | 2000-01-25 | 468.79 |
| -2 | 2452041 | 2001-05-11 | 469.71 |
| -1 | 2452514 | 2002-08-27 | 467.86 |
| 0 | 2452980 | 2003-12-06 | 469.29 |
| 1 | 2453459 | 2005-03-29 | 469.57 |
| 2 | 2453919 | 2006-07-02 | 466.86 |
| 3 | 2454370 | 2007-09-26 | 466.14 |
| 4 | 2454873 | 2009-02-10 | 465.57 |
| 5 | 2455311 | 2010-04-24 | 465.14 |
| 6 | 2455780 | 2011-08-06 | 464.21 |
| 7 | 2456240 | 2012-11-08 | 459.93 |
| 8 | 2456717 | 2014-02-28 | 459.29 |
| 9 | 2457173 | 2015-05-30 | 460.57 |
| 10 | 2457615 | 2016-08-14 | 458.29 |
| 11 | 2458067 | 2017-11-09 | 456.64 |
| 12 | 2458547 | 2019-03-04 | 455.03 |
| 13 | 2458992 | 2020-05-22 | 456.34 |
| 14 | 2459444 | 2021-08-17 | 460.42 |
| 15 | 2459906 | 2022-11-22 | 462.1 |
| 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. |