| E | O (JD) | O (dat) | Period |
| -104 | 2415080 | 1900-03-01 | 273.33 |
| -99 | 2416433 | 1903-11-14 | 273.75 |
| -92 | 2418330 | 1909-01-23 | 273.35 |
| -91 | 2418600 | 1909-10-20 | 272.07 |
| -88 | 2419434 | 1912-02-01 | 271.93 |
| -87 | 2419715 | 1912-11-08 | 271.06 |
| -84 | 2420520 | 1915-01-22 | 270.31 |
| -83 | 2420790 | 1915-10-19 | 269.2 |
| -80 | 2421600 | 1918-01-06 | 267.42 |
| -76 | 2422650 | 1920-11-21 | 267.05 |
| -75 | 2422930 | 1921-08-28 | 266.97 |
| -69 | 2424526 | 1926-01-10 | 266.7 |
| -66 | 2425320 | 1928-03-14 | 267.39 |
| -65 | 2425597 | 1928-12-16 | 268.3 |
| -64 | 2425858 | 1929-09-03 | 268.12 |
| -62 | 2426400 | 1931-02-27 | 268.75 |
| -61 | 2426674 | 1931-11-28 | 269.84 |
| -60 | 2426955 | 1932-09-04 | 269.78 |
| -58 | 2427472 | 1934-02-03 | 269.24 |
| -57 | 2427749 | 1934-11-07 | 268.84 |
| -56 | 2428025 | 1935-08-10 | 268.36 |
| -55 | 2428286 | 1936-04-27 | 269.52 |
| -54 | 2428549 | 1937-01-15 | 270.92 |
| -50 | 2429633 | 1940-01-04 | 270.87 |
| -49 | 2429900 | 1940-09-27 | 266.65 |
| -46 | 2430726 | 1943-01-01 | 265.26 |
| -42 | 2431810 | 1945-12-20 | 265.35 |
| -41 | 2432090 | 1946-09-26 | 265.45 |
| -7 | 2441020 | 1971-03-09 | 265.1 |
| -6 | 2441280 | 1971-11-24 | 264.53 |
| -3 | 2442110 | 1974-03-03 | 264.04 |
| -2 | 2442375 | 1974-11-23 | 264.65 |
| -1 | 2442640 | 1975-08-15 | 269.11 |
| 0 | 2442910 | 1976-05-11 | 267.55 |
| 1 | 2443169 | 1977-01-25 | 265.06 |
| 2 | 2443438 | 1977-10-21 | 265.71 |
| 4 | 2443975 | 1979-04-11 | 265.78 |
| 5 | 2444231 | 1979-12-23 | 265.06 |
| 6 | 2444495 | 1980-09-12 | 265.21 |
| 8 | 2445037 | 1982-03-08 | 265.69 |
| 9 | 2445297 | 1982-11-23 | 266.53 |
| 10 | 2445553 | 1983-08-06 | 267.45 |
| 12 | 2446093 | 1985-01-27 | 266.53 |
| 13 | 2446368 | 1985-10-29 | 265.5 |
| 15 | 2446902 | 1987-04-16 | 266.39 |
| 16 | 2447173 | 1988-01-12 | 267.23 |
| 17 | 2447423 | 1988-09-18 | 266.43 |
| 18 | 2447690 | 1989-06-12 | 265.33 |
| 19 | 2447955 | 1990-03-04 | 265.43 |
| 20 | 2448234 | 1990-12-08 | 266.57 |
| 21 | 2448490 | 1991-08-21 | 268.28 |
| 22 | 2448760 | 1992-05-17 | 268.14 |
| 23 | 2449031 | 1993-02-12 | 267.64 |
| 24 | 2449297 | 1993-11-05 | 268.71 |
| 25 | 2449572 | 1994-08-07 | 270.5 |
| 26 | 2449827 | 1995-04-19 | 269.71 |
| 27 | 2450109 | 1996-01-26 | 269.5 |
| 28 | 2450377 | 1996-10-20 | 270.93 |
| 29 | 2450660 | 1997-07-30 | 272.27 |
| 30 | 2450907 | 1998-04-03 | 272.75 |
| 31 | 2451194 | 1999-01-15 | 272.06 |
| 32 | 2451468 | 1999-10-16 | 271.12 |
| 34 | 2452015 | 2001-04-15 | 271.39 |
| 35 | 2452285 | 2002-01-10 | 271.23 |
| 36 | 2452554 | 2002-10-06 | 269.74 |
| 38 | 2453092 | 2004-03-27 | 269.11 |
| 39 | 2453360 | 2004-12-20 | 268.11 |
| 40 | 2453623 | 2005-09-09 | 267.95 |
| 42 | 2454164 | 2007-03-04 | 268.3 |
| 43 | 2454432 | 2007-11-27 | 268.06 |
| 44 | 2454694 | 2008-08-15 | 268.12 |
| 45 | 2454968 | 2009-05-16 | 268.93 |
| 46 | 2455239 | 2010-02-11 | 269.36 |
| 47 | 2455502 | 2010-11-01 | 270.21 |
| 48 | 2455771 | 2011-07-28 | 270.57 |
| 49 | 2456050 | 2012-05-02 | 270.43 |
| 50 | 2456317 | 2013-01-24 | 270.14 |
| 51 | 2456592 | 2013-10-26 | 269.57 |
| 52 | 2456858 | 2014-07-19 | 269.5 |
| 53 | 2457135 | 2015-04-22 | 268.64 |
| 54 | 2457388 | 2015-12-31 | 268.28 |
| 55 | 2457659 | 2016-09-27 | 268.64 |
| 56 | 2457935 | 2017-06-30 | 268.21 |
| 57 | 2458193 | 2018-03-15 | 269.5 |
| 58 | 2458472 | 2018-12-19 | 270.79 |
| 59 | 2458739 | 2019-09-12 | 269.74 |
| 60 | 2459009 | 2020-06-08 | 270.74 |
| 61 | 2459287 | 2021-03-13 | 271.35 |
| 62 | 2459551 | 2021-12-02 | 269.82 |
| 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. |