| E | O (JD) | O (dat) | Period |
| -105 | 2414540 | 1898-09-07 | 274.26 |
| -104 | 2414810 | 1899-06-04 | 275 |
| -101 | 2415620 | 1901-08-23 | 275.25 |
| -100 | 2415940 | 1902-07-09 | 274.51 |
| -89 | 2418930 | 1910-09-15 | 272.27 |
| -83 | 2420600 | 1915-04-12 | 270.47 |
| -81 | 2421135 | 1916-09-28 | 269.77 |
| -80 | 2421400 | 1917-06-20 | 268.91 |
| -63 | 2425920 | 1929-11-04 | 267.06 |
| -57 | 2427500 | 1934-03-03 | 266.19 |
| -56 | 2427800 | 1934-12-28 | 266.5 |
| -55 | 2428045 | 1935-08-30 | 266.93 |
| -54 | 2428310 | 1936-05-21 | 269.6 |
| -51 | 2429130 | 1938-08-19 | 270.29 |
| -50 | 2429395 | 1939-05-11 | 269.97 |
| -49 | 2429670 | 1940-02-10 | 271.48 |
| -46 | 2430490 | 1942-05-10 | 272.04 |
| -43 | 2431297 | 1944-07-25 | 272.55 |
| -39 | 2432377 | 1947-07-10 | 272.48 |
| -31 | 2434566 | 1953-07-07 | 272.02 |
| -30 | 2434844 | 1954-04-11 | 272 |
| -26 | 2435946 | 1957-04-17 | 272.42 |
| -23 | 2436743 | 1959-06-23 | 272.46 |
| -20 | 2437562 | 1961-09-19 | 271.21 |
| -18 | 2438097 | 1963-03-08 | 269.85 |
| -16 | 2438653 | 1964-09-14 | 269.63 |
| -15 | 2438916 | 1965-06-04 | 269.43 |
| -12 | 2439715 | 1967-08-12 | 268.28 |
| -11 | 2439980 | 1968-05-03 | 267.56 |
| -8 | 2440798 | 1970-07-30 | 267.22 |
| -5 | 2441590 | 1972-09-29 | 267.86 |
| -1 | 2442654 | 1975-08-29 | 268.83 |
| 3 | 2443728 | 1978-08-07 | 268.96 |
| 6 | 2444530 | 1980-10-17 | 268.91 |
| 11 | 2445887 | 1984-07-05 | 269.8 |
| 14 | 2446712 | 1986-10-08 | 270.74 |
| 15 | 2446976 | 1987-06-29 | 271.84 |
| 16 | 2447244 | 1988-03-23 | 272.82 |
| 18 | 2447792 | 1989-09-22 | 273.86 |
| 19 | 2448066 | 1990-06-23 | 274.34 |
| 22 | 2448891 | 1992-09-25 | 274.14 |
| 23 | 2449165 | 1993-06-26 | 274.29 |
| 24 | 2449459 | 1994-04-16 | 274.35 |
| 26 | 2449990 | 1995-09-29 | 274.67 |
| 27 | 2450261 | 1996-06-26 | 274.82 |
| 28 | 2450535 | 1997-03-27 | 272.88 |
| 29 | 2450810 | 1997-12-27 | 271.33 |
| 30 | 2451091 | 1998-10-04 | 271.49 |
| 31 | 2451362 | 1999-07-02 | 271.43 |
| 32 | 2451628 | 2000-03-24 | 270.87 |
| 33 | 2451891 | 2000-12-12 | 269.19 |
| 34 | 2452161 | 2001-09-08 | 267.56 |
| 35 | 2452435 | 2002-06-09 | 267.83 |
| 37 | 2452973 | 2003-11-29 | 268.28 |
| 38 | 2453235 | 2004-08-17 | 268.5 |
| 39 | 2453499 | 2005-05-08 | 268.59 |
| 41 | 2454044 | 2006-11-04 | 268.67 |
| 42 | 2454304 | 2007-07-22 | 269.29 |
| 45 | 2455118 | 2009-10-13 | 269.91 |
| 46 | 2455387 | 2010-07-09 | 270.09 |
| 47 | 2455663 | 2011-04-11 | 270.45 |
| 49 | 2456200 | 2012-09-29 | 270.99 |
| 50 | 2456472 | 2013-06-28 | 269.8 |
| 52 | 2457013 | 2014-12-21 | 268.23 |
| 53 | 2457285 | 2015-09-19 | 267.73 |
| 54 | 2457557 | 2016-06-17 | 268.04 |
| 57 | 2458344 | 2018-08-13 | 268.38 |
| 58 | 2458607 | 2019-05-03 | 267.82 |
| 60 | 2459146 | 2020-10-23 | 266.01 |
| 61 | 2459423 | 2021-07-27 | 266.95 |
| 62 | 2459698 | 2022-04-28 | 269.07 |
| 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. |