Cycle | Saros-Inex Combination |
Lunations Eclipse Seasons |
Period | Comments |
---|---|---|---|---|
Fortnight | 19 I – 30½ S | ½ 0 |
14.765 d 0.0404 y |
Shortest possible interval between a lunar and a solar eclipse. |
Synodic month (Lunation, Nova) | 38 I – 61 S | 1 0 |
29.531 d 0.0809 y |
Shortest possible interval between two successive lunar or solar eclipses. |
Short Semester (Pentalunex) | 53 S – 33 I | 5 1 |
147.65 d 0.404 y |
|
Semester | 5 I – 8 S | 6 1 |
177.18 d 0.485 y |
Two successive lunar or solar eclipses at alternate lunar nodes. |
Long Semester | 43 I – 69 S | 7 1 |
206.71 d 0.566 y |
|
Lunar year | 10 I – 16 S | 12 2 |
354.37 d 0.970 y |
1 lunar year |
Hexon | 13 S – 8 I | 35 6 |
1033.57 d 2.830 y |
|
Hepton | 5 S – 3 I | 41 7 |
1210.75 d 3.315 y |
Eclipses repeat on (nearly) the same weekday. |
Octon | 2 I – 3 S | 47 >8 |
1387.94 d 3.800 y |
|
Tzolkinex | 2 S – I | 88 15 |
2598.69 d 7.115 y |
Nearly 10 Tzolkins. |
Hibbardina | 31 S – 19 I | 111 19 |
3277.90 d 8.975 y |
Nearly similar pairs of central solar eclipses |
Sar (Half Saros) | ½ S | 111½ 19 |
3292.66 d 9.015 y |
Alternating lunar and solar eclipses of nearly similar character. |
Tritos | I – S | 135 23 |
3986.63 d 10.915 y |
|
Saros (Chaldean) | S | 223 38 |
6585.32 d 18.030 y |
Similar solar eclipses spaced about 120º apart in terrestrial longitude. |
Metonic Cycle | 10 I – 15 S | 235 40 |
6939.69 d 19.000 y |
Same date in the Julian/Gregorian and luni-solar calendars. |
Semanex | 3 S – I | 311 53 |
9184.01 d 25.145 y |
Same weekday. |
Thix | 4 I – 5 S | 317 54 |
9361.20 d 25.630 y |
Approximately 36 Tzolkins. |
Inex | I | 358 61 |
10571.95 d 28.945 y |
Similar solar eclipses at the same terrestrial longitude but opposite latitudes. |
Triple Tritos (Fox, Maya, Mayan Eclipse Cycle) |
3 I – 3 S | 405 69 |
11959.89 d 32.745 y |
Nearly 46 Tzolkins. |
Double Saros | 2 S | 446 76 |
13170.64 d 36.060 y |
|
Unnamed (40) | 2 I – S | 493 84 |
14558.58 d 39.860 y |
|
Unnamed (47) | I + S | 581 99 |
17157.27 d 46.975 y |
Same weekday. |
Unnamed (51) | 3 I – 2 S | 628 107 |
18545.21 d 50.775 y |
|
Exeligmos (Triple Saros) | 3 S | 669 114 |
19755.96 d 54.090 y |
Similar solar eclipses at approximately the same terrestrial longitude. |
Double Inex | 2 I | 716 122 |
21143.90 d 57.890 y |
|
Unnamed (61) | 4 I – 3 S | 763 130 |
22531.84 d 61.690 y |
|
Unidos | I + 2 S | 804 137 |
23742.59 d 65.005 y |
67 lunar years, nearly same date in Julian/Gregorian calendar. |
Unnamed (69) | 3 I – S | 851 145 |
25130.53 d 68.805 y |
|
Short Calippic Cycle | 2 I + S | 939 160 |
27729.22 d 75.920 y |
4 Metonic Cycles minus one month. |
Triad (Triple Inex) | 3 I | 1074 183 |
31715.85 d 86.835 y |
|
Quarter Palmen Cycle | 4 I – S | 1209 206 |
35702.48 d 97.750 y |
|
Mercury Cycle | 2 I + 3 S | 1385 236 |
40899.87 d 111.98 y |
Nearly equals 353 synodic periods of the planet Mercury. |
Tritrix | 3 I + 3 S | 1743 297 |
51471.82 d 140.93 y |
|
Unnamed (176) | 21 S – 7 I | 2177 371 |
64288.09 d 176.01 y |
Nearly similar pairs of central solar eclipses. |
Unnamed (176.5) | 13 S – 2 I | 2183 372 |
64465.28 d 176.50 y |
|
Trihex | 3 I + 6 S | 2412 411 |
71227.78 d 195.02 y |
201 lunar years. |
Half Babylonian Period | 7 I + S | 2729 465 |
80588.98 d 220.65 y |
|
Unnamed (246) | 6 I + 4 S | 3040 518 |
89772.99 d 245.79 y |
|
Unnamed (298) | 24 I – 22 S | 3686 628 |
108849.8 d 298.02 y |
|
Macdonald Cycle | 6 I + 7 S | 3709 632 |
109529.0 d 299.88 y |
Nearly similar eclipses on the same day of the week. |
Utting Cycle | 10 I + S | 3803 648 |
112304.8 d 307.48 y |
|
Unnamed (327) | 25 I – 22 S | 4044 689 |
119421.7 d 326.97 y |
337 lunar years. |
Unnamed (336) | 11 I + S | 4161 709 |
122876.8 d 336.43 y |
|
Hipparchus Cycle | 25 I – 21 S | 4267 727 |
126007.0 d 345.00 y |
Nearly similar pairs of central solar eclipses. |
Unnamed (353) | 26 S – 4 I | 4366 744 |
128930.6 d 353.00 y |
Same Gregorian calendar date (approximately). |
Square Year (Jubilee Period) | 12 I + S | 4519 770 |
133448.7 d 365.37 y |
|
Gregoriana | 6 I + 11 S | 4601 784 |
135870.2 d 372.00 y |
Same Gregorian calendar date and weekday (approximately). |
Hexdodeka | 6 I + 12 S | 4824 822 |
142455.6 d 390.03 y |
402 lunar years. |
Grattan Guinness Cycle | 16 I – 4 S | 4836 824 |
142809.9 d 391.00 y |
403 lunar years and same Gregorian calendar date (approximately). |
Babylonian Period (Hipparchian Period) | 14 I + 2 S | 5458 930 |
161178.0 d 441.29 y |
|
Unnamed (520.5) | 13 I + 8 S | 6438 1097 |
190117.9 d 520.53 y |
|
Basic Period (Pingré Cycle, Hyper Saros) | 18 I | 6444 1098 |
190295.1 d 521.01 y |
537 lunar years, same Julian calendar date and same weekday. |
Chalepe (Great Chaldean Cycle) | 18 I + 2 S | 6890 1174 |
203465.8 d 557.07 y |
|
Tetradia | 19 I + 2 S | 7248 1235 |
214037.7 d 586.02 y |
604 lunar years and same Julian calendar date (approximately). |
Unnamed (595) | 33 S | 7359 1254 |
217315.6 d 594.99 y |
|
Unnamed (600) | 12 I + 14 S | 7418 1264 |
219057.9 d 599.76 y |
Same day of the week. |
Unnamed (702) | 23 I + 2 S | 8680 1479 |
256325.5 d 701.80 y |
|
Unnamed (725) | 37 S + 2 I | 8967 1528 |
264800.8 d 725.00 y |
Same Gregorian calendar date (approximately). |
Hyper Exeligmos | 24 I + 12 S | 11268 1920 |
332750.7 d 911.04 y |
939 lunar years. |
Double Basic Period | 36 I | 12888 2196 |
380590.2 d 1042.0 y |
1074 lunar years, same Julian calendar date and same weekday. |
Unnamed (1154) | 38 I + 3 S | 14273 2432 |
421490.1 d 1154.0 y |
Same Gregorian calendar date (approximately). |
Unnamed (1172) | 38 I + 4 S | 14496 2470 |
428075.4 d 1172.0 y |
1208 lunar years and same Julian calendar date (approximately). |
Unnamed (1404) | 46 I + 4 S | 17360 2958 |
512651.0 d 1403.6 y |
|
Unnamed (1418) | 49 I | 17542 2989 |
518025.6 d 1418.3 y |
|
Unnamed (1490) | 49 I + 4 S | 18434 3141 |
544366.9 d 1490.4 y |
|
Cartouche | 52 I | 18616 3172 |
549741.4 d 1505.1 y |
|
Triple Basic Period | 54 I | 19332 3294 |
570885.3 d 1563.0 y |
1611 lunar years and same weekday (approximately). |
Unnamed (1610) | 55 I + S | 19913 3393 |
588042.6 d 1610.0 y |
|
Unnamed (1628) | 55 I + 2 S | 20136 3431 |
594627.9 d 1628.0 y |
1678 lunar years and same Julian calendar date (approximately). |
Palaea-Horologia | 55 I + 3 S | 20359 3469 |
601213.3 d 1646.1 y |
|
Hybridia | 55 I + 4 S | 20582 3507 |
607798.6 d 1664.1 y |
|
Selenid I | 55 I + 5 S | 20805 3545 |
614383.9 d 1682.1 y |
|
Unnamed (1700) | 55I + 6 S | 21028 3583 |
620969.2 d 1700.2 y |
|
Unnamed (1751) | 58 I + 4 S | 21656 3690 |
639514.4 d 1750.9 y |
|
Proxima | 58 I + 5 S | 21879 3728 |
646099.8 d 1769.0 y |
Nearly 2485 Tzolkins and same weekday. |
Heliotrope | 58 I + 6 S | 22102 3766 |
652685.1 d 1787.0 y |
|
Megalosaros | 58 I + 7 S | 22325 3804 |
659270.4 d 1805.0 y |
95 Metonic Cycles. |
Immobilis | 58 I + 8 S | 22548 3842 |
665855.7 d 1823.1 y |
1879 lunar years. |
Accuratissima | 58 I + 9 S | 22771 3880 |
672441.0 d 1841.1 y |
Same weekday. |
Unnamed (2471) | 81 I + 7 S | 30559 5207 |
902425.3 d 2470.8 y |
|
Selenid II | 95 I + 11 S | 36463 6213 |
1076773.9 d 2948.1 y |
|
Horologia | 110 I + 7 S | 40941 6976 |
1209011.8 d 3310.2 y |
Same weekday (approximately). |