| E | O (JD) | O (dat) | Period |
| -72 | 2415170 | 1900-05-30 | 410.49 |
| -71 | 2415570 | 1901-07-04 | 413.83 |
| -70 | 2415990 | 1902-08-28 | 413.61 |
| -69 | 2416390 | 1903-10-02 | 413.03 |
| -68 | 2416809 | 1904-11-24 | 413.07 |
| -67 | 2417220 | 1906-01-09 | 413.5 |
| -64 | 2418480 | 1909-06-22 | 414.23 |
| -63 | 2418880 | 1910-07-27 | 414.75 |
| -62 | 2419284 | 1911-09-04 | 416.12 |
| -61 | 2419705 | 1912-10-29 | 416.82 |
| -60 | 2420130 | 1913-12-28 | 418.06 |
| -59 | 2420544 | 1915-02-15 | 419.14 |
| -57 | 2421380 | 1917-05-31 | 421.03 |
| -56 | 2421815 | 1918-08-09 | 422.06 |
| -55 | 2422230 | 1919-09-28 | 422.56 |
| -54 | 2422658 | 1920-11-29 | 422.89 |
| -53 | 2423073 | 1922-01-18 | 422.46 |
| -50 | 2424348 | 1925-07-16 | 421.36 |
| -49 | 2424773 | 1926-09-14 | 419.63 |
| -48 | 2425200 | 1927-11-15 | 418.01 |
| -47 | 2425620 | 1929-01-08 | 415.83 |
| -45 | 2426440 | 1931-04-08 | 414.05 |
| -43 | 2427270 | 1933-07-16 | 411.66 |
| -42 | 2427670 | 1934-08-20 | 410.68 |
| -41 | 2428070 | 1935-09-24 | 409.41 |
| -40 | 2428470 | 1936-10-28 | 409.37 |
| -39 | 2428892 | 1937-12-24 | 409.62 |
| -37 | 2429720 | 1940-03-31 | 412.26 |
| -35 | 2430540 | 1942-06-29 | 413.98 |
| -34 | 2430930 | 1943-07-24 | 415.66 |
| -33 | 2431360 | 1944-09-26 | 416.92 |
| -32 | 2431769 | 1945-11-09 | 417.32 |
| -29 | 2433060 | 1949-05-23 | 417.92 |
| -28 | 2433460 | 1950-06-27 | 418.22 |
| -27 | 2433890 | 1951-08-31 | 418.31 |
| -26 | 2434308 | 1952-10-22 | 417.67 |
| -20 | 2436799 | 1959-08-18 | 417.31 |
| -19 | 2437218 | 1960-10-10 | 416.31 |
| -17 | 2438050 | 1963-01-20 | 416.29 |
| -15 | 2438890 | 1965-05-09 | 415.67 |
| -14 | 2439300 | 1966-06-23 | 415.7 |
| -13 | 2439720 | 1967-08-17 | 415.83 |
| -12 | 2440124 | 1968-09-24 | 416.15 |
| -11 | 2440540 | 1969-11-14 | 416.74 |
| -10 | 2440950 | 1970-12-29 | 417.44 |
| -8 | 2441796 | 1973-04-23 | 418.82 |
| -7 | 2442212 | 1974-06-13 | 420.14 |
| -6 | 2442638 | 1975-08-13 | 421.82 |
| -5 | 2443059 | 1976-10-07 | 422.88 |
| -4 | 2443480 | 1977-12-02 | 424.25 |
| -3 | 2443910 | 1979-02-05 | 425.4 |
| -2 | 2444336 | 1980-04-06 | 426.35 |
| -1 | 2444763 | 1981-06-07 | 427.19 |
| 0 | 2445185 | 1982-08-03 | 427.47 |
| 1 | 2445618 | 1983-10-10 | 428.11 |
| 2 | 2446049 | 1984-12-14 | 428.02 |
| 3 | 2446475 | 1986-02-13 | 428.02 |
| 4 | 2446909 | 1987-04-23 | 427.24 |
| 5 | 2447325 | 1988-06-12 | 426.63 |
| 6 | 2447765 | 1989-08-26 | 424.95 |
| 7 | 2448185 | 1990-10-20 | 423.01 |
| 8 | 2448612 | 1991-12-21 | 420.83 |
| 9 | 2449024 | 1993-02-05 | 419.06 |
| 10 | 2449453 | 1994-04-10 | 417.26 |
| 11 | 2449861 | 1995-05-23 | 415.17 |
| 12 | 2450271 | 1996-07-06 | 413.25 |
| 13 | 2450679 | 1997-08-18 | 411.6 |
| 14 | 2451103 | 1998-10-16 | 410.44 |
| 15 | 2451507 | 1999-11-24 | 409.13 |
| 16 | 2451921 | 2001-01-11 | 408.92 |
| 17 | 2452316 | 2002-02-10 | 407.72 |
| 18 | 2452728 | 2003-03-29 | 405.81 |
| 19 | 2453135 | 2004-05-09 | 404.05 |
| 20 | 2453542 | 2005-06-20 | 403.55 |
| 21 | 2453955 | 2006-08-07 | 403.29 |
| 22 | 2454344 | 2007-08-31 | 402.68 |
| 23 | 2454733 | 2008-09-23 | 402.3 |
| 24 | 2455139 | 2009-11-03 | 402.84 |
| 25 | 2455550 | 2010-12-19 | 403.13 |
| 26 | 2455960 | 2012-02-02 | 404.05 |
| 27 | 2456346 | 2013-02-22 | 406.18 |
| 28 | 2456762 | 2014-04-14 | 408.03 |
| 29 | 2457177 | 2015-06-03 | 409.1 |
| 30 | 2457573 | 2016-07-03 | 410.53 |
| 31 | 2457986 | 2017-08-20 | 411.47 |
| 32 | 2458406 | 2018-10-14 | 413.07 |
| 33 | 2458823 | 2019-12-05 | 413.31 |
| 34 | 2459235 | 2021-01-20 | 414.21 |
| 35 | 2459656 | 2022-03-17 | 416.54 |
| 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. |