| E | O (JD) | O (dat) | Period |
| 0 | 2424802 | 1926-10-13 | 252.32 |
| 61 | 2440167 | 1968-11-06 | 251.96 |
| 62 | 2440425 | 1969-07-22 | 251.66 |
| 64 | 2440940 | 1970-12-19 | 251.87 |
| 70 | 2442450 | 1975-02-06 | 251.91 |
| 77 | 2444197 | 1979-11-19 | 251.83 |
| 79 | 2444705 | 1981-04-10 | 251.44 |
| 80 | 2444954 | 1981-12-15 | 251.03 |
| 81 | 2445206 | 1982-08-24 | 251.59 |
| 82 | 2445459 | 1983-05-04 | 251.93 |
| 83 | 2445712 | 1984-01-12 | 251.57 |
| 84 | 2445962 | 1984-09-18 | 252.14 |
| 85 | 2446220 | 1985-06-03 | 251.93 |
| 86 | 2446461 | 1986-01-30 | 251.57 |
| 87 | 2446720 | 1986-10-16 | 250.93 |
| 88 | 2446970 | 1987-06-23 | 250.29 |
| 89 | 2447222 | 1988-03-01 | 250.93 |
| 90 | 2447471 | 1988-11-05 | 250.5 |
| 91 | 2447716 | 1989-07-08 | 249.8 |
| 92 | 2447970 | 1990-03-19 | 249.75 |
| 93 | 2448224 | 1990-11-28 | 249.19 |
| 94 | 2448464 | 1991-07-26 | 249.44 |
| 96 | 2448973 | 1992-12-16 | 249.19 |
| 97 | 2449215 | 1993-08-15 | 248.5 |
| 98 | 2449465 | 1994-04-22 | 248.06 |
| 99 | 2449713 | 1994-12-26 | 247.67 |
| 100 | 2449960 | 1995-08-30 | 249.07 |
| 101 | 2450210 | 1996-05-06 | 250.21 |
| 102 | 2450447 | 1996-12-29 | 249.64 |
| 103 | 2450705 | 1997-09-13 | 250.21 |
| 104 | 2450970 | 1998-06-05 | 250.21 |
| 105 | 2451213 | 1999-02-03 | 251.07 |
| 106 | 2451460 | 1999-10-08 | 251.93 |
| 107 | 2451716 | 2000-06-20 | 249.93 |
| 108 | 2451957 | 2001-02-16 | 249.43 |
| 109 | 2452215 | 2001-11-01 | 251.47 |
| 110 | 2452464 | 2002-07-08 | 251.94 |
| 111 | 2452710 | 2003-03-11 | 251.75 |
| 112 | 2452965 | 2003-11-21 | 251.69 |
| 114 | 2453480 | 2005-04-19 | 251.13 |
| 115 | 2453727 | 2005-12-22 | 251.25 |
| 116 | 2453974 | 2006-08-26 | 252.31 |
| 117 | 2454225 | 2007-05-04 | 251.67 |
| 118 | 2454472 | 2008-01-06 | 250.5 |
| 119 | 2454722 | 2008-09-12 | 251.31 |
| 120 | 2454990 | 2009-06-07 | 252.17 |
| 121 | 2455230 | 2010-02-02 | 252.95 |
| 122 | 2455484 | 2010-10-14 | 253.3 |
| 125 | 2456238 | 2012-11-06 | 253 |
| 126 | 2456500 | 2013-07-26 | 253 |
| 128 | 2457003 | 2014-12-11 | 253.5 |
| 129 | 2457257 | 2015-08-22 | 253.44 |
| 130 | 2457515 | 2016-05-06 | 252.75 |
| 131 | 2457765 | 2017-01-11 | 252.27 |
| 132 | 2458019 | 2017-09-22 | 252.93 |
| 133 | 2458265 | 2018-05-26 | 252.86 |
| 134 | 2458517 | 2019-02-02 | 252.43 |
| 135 | 2458770 | 2019-10-13 | 252.36 |
| 136 | 2459031 | 2020-06-30 | 252.63 |
| 137 | 2459281 | 2021-03-07 | 253.94 |
| 138 | 2459533 | 2021-11-14 | 254.58 |
| 139 | 2459784 | 2022-07-23 | 254.9 |
| 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. |