| E | O (JD) | O (dat) | Period |
| -80 | 2415800 | 1902-02-19 | 283.33 |
| -77 | 2416650 | 1904-06-18 | 283.71 |
| -76 | 2416930 | 1905-03-25 | 286.04 |
| -72 | 2418070 | 1908-05-08 | 285.67 |
| -71 | 2418350 | 1909-02-12 | 284.29 |
| -68 | 2419205 | 1911-06-17 | 284.29 |
| -67 | 2419520 | 1912-04-27 | 284.29 |
| -66 | 2419780 | 1913-01-12 | 283.93 |
| -63 | 2420630 | 1915-05-12 | 284.11 |
| -62 | 2420910 | 1916-02-16 | 283.07 |
| -58 | 2422050 | 1919-04-01 | 282.94 |
| -57 | 2422320 | 1919-12-27 | 283.53 |
| -54 | 2423190 | 1922-05-15 | 282.94 |
| -50 | 2424310 | 1925-06-08 | 283.55 |
| -49 | 2424610 | 1926-04-04 | 283.67 |
| -46 | 2425440 | 1928-07-12 | 282.33 |
| -45 | 2425720 | 1929-04-18 | 281.48 |
| -44 | 2426030 | 1930-02-22 | 280.77 |
| -41 | 2426850 | 1932-05-22 | 279.62 |
| -40 | 2427130 | 1933-02-26 | 279.62 |
| -37 | 2427970 | 1935-06-16 | 278.84 |
| -36 | 2428250 | 1936-03-22 | 279.73 |
| -33 | 2429070 | 1938-06-20 | 282.54 |
| -32 | 2429360 | 1939-04-06 | 283.58 |
| -31 | 2429640 | 1940-01-11 | 284.43 |
| -28 | 2430513 | 1942-06-02 | 286.58 |
| -27 | 2430813 | 1943-03-29 | 287.54 |
| -24 | 2431660 | 1945-07-23 | 288.12 |
| -23 | 2431955 | 1946-05-14 | 285.41 |
| -22 | 2432243 | 1947-02-26 | 284.01 |
| -19 | 2433088 | 1949-06-20 | 283.94 |
| -18 | 2433403 | 1950-05-01 | 283.73 |
| 8 | 2440735 | 1970-05-28 | 283.58 |
| 9 | 2441040 | 1971-03-29 | 283.68 |
| 13 | 2442161 | 1974-04-23 | 283.36 |
| 17 | 2443301 | 1977-06-06 | 283.34 |
| 18 | 2443583 | 1978-03-15 | 284.47 |
| 19 | 2443875 | 1979-01-01 | 284.74 |
| 21 | 2444435 | 1980-07-14 | 285.39 |
| 22 | 2444720 | 1981-04-25 | 284.68 |
| 23 | 2445020 | 1982-02-19 | 283.38 |
| 26 | 2445869 | 1984-06-17 | 283.35 |
| 27 | 2446157 | 1985-04-01 | 283.77 |
| 30 | 2446990 | 1987-07-13 | 282.74 |
| 31 | 2447269 | 1988-04-17 | 281.46 |
| 32 | 2447558 | 1989-01-31 | 281 |
| 33 | 2447840 | 1989-11-09 | 281.95 |
| 35 | 2448403 | 1991-05-26 | 283.05 |
| 36 | 2448678 | 1992-02-25 | 282.86 |
| 39 | 2449530 | 1994-06-26 | 282.83 |
| 40 | 2449820 | 1995-04-12 | 282.74 |
| 41 | 2450100 | 1996-01-17 | 283.12 |
| 44 | 2450950 | 1998-05-16 | 283.58 |
| 45 | 2451236 | 1999-02-26 | 283.59 |
| 46 | 2451510 | 1999-11-27 | 283.26 |
| 49 | 2452366 | 2002-04-01 | 282.45 |
| 50 | 2452648 | 2003-01-08 | 282.32 |
| 51 | 2452941 | 2003-10-28 | 283.17 |
| 53 | 2453494 | 2005-05-03 | 283.45 |
| 54 | 2453770 | 2006-02-03 | 283 |
| 57 | 2454627 | 2008-06-09 | 282.55 |
| 58 | 2454915 | 2009-03-24 | 282.67 |
| 59 | 2455197 | 2009-12-31 | 284.1 |
| 61 | 2455760 | 2011-07-17 | 284.83 |
| 62 | 2456045 | 2012-04-27 | 284.5 |
| 63 | 2456326 | 2013-02-02 | 284.82 |
| 64 | 2456620 | 2013-11-23 | 286.2 |
| 65 | 2456904 | 2014-09-03 | 286.86 |
| 66 | 2457190 | 2015-06-16 | 286.44 |
| 67 | 2457479 | 2016-03-31 | 285.51 |
| 68 | 2457771 | 2017-01-17 | 284.75 |
| 70 | 2458337 | 2018-08-06 | 284.5 |
| 71 | 2458617 | 2019-05-13 | 283.56 |
| 72 | 2458897 | 2020-02-17 | 282.64 |
| 73 | 2459183 | 2020-11-29 | 281.65 |
| 74 | 2459463 | 2021-09-05 | 281.49 |
| 75 | 2459743 | 2022-06-12 | 281.79 |
| 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. |