It's all very well digging into the theory — what does this mean in practice? In particular, how often will I see an eclipse? This page gives you some statistics about how often eclipses occur to hopefully provide the answers.

Don't forget that you can also directly browse the solar and lunar eclipse catalogs, and even search the entire database.

So how often can we see an eclipse? Well, as explained in Eclipse Cycles, there are two eclipse seasons per year (actually, one every 173 days) when an eclipse can occur. An eclipse season lasts for 37 days; since the Moon only takes 29 days to complete an orbit, we're guaranteed one solar and one lunar eclipse (which may or may not be total) every eclipse season. With an eclipse season happening a little more often than every 6 months, there are at least two — and sometimes three — in a year; so there should be at least 4 eclipses a year.

In fact, since one orbit of the Moon takes less time than the
length of an eclipse season, it's quite possible to get two solar
*or* two lunar eclipses in an eclipse season (but not two of
each); this happens a bit more than every 4 years, on average, for
solar eclipses, and about every 3 years for lunar eclipses. However,
since the two eclipses have to be at either end of the season, the two
eclipses are usually both small partial eclipses; but about every 300
years, a total solar eclipse and a partial solar eclipse occur in the
same eclipse season. The last time this happened was in 1928; a tiny
total eclipse in the far south, in May, was followed in June by a
small partial eclipse in the far north. The next time this happens
will be in July and August 2195.

So, every year sees at least 4 eclipses (2 solar and 2 lunar), somewhere on the Earth. About once in 3½ years, 5 eclipses occur; 6 in a year happens ever 4½ years or so; and you can get 7 eclipses in a year, but that's rare — only about every 33 years. (The last year this happened was 1982; the next time will be 2038.)

Total eclipses are, of course, rarer. On average, a total solar eclipse happens about twice in three years, and total lunar eclipses are a little more frequent than that. It's possible to get 2 total solar eclipses in a year, but again this is rare; only every 170 years or so. However, two total lunar eclipses occur in a single year about once every 3.5 years, and 3 in a year about every 200 years.

Actually seeing an eclipse is a little more tricky, of course; you actually have to be in the right place at the right time. For solar eclipses, because the partial phase of a total solar eclipse covers a relatively large area, this can be seen about every 2 years, on average, from any given spot on the Earth. The much narrower track of the total eclipse falls over a particular place far less often — the best guess is about every 360 years on the average, although they're distributed so randomly (in effect, though, of course, it's not really random) that a given spot might not see a total eclipse for centuries, or might see two within a few years. Some examples of the latter are shown in the USA eclipse bonanza page.

Lunar eclipses are much easier to see; because the action is happening on the Moon, and on the side facing us, anywhere that the Moon is up during the eclipse will see it (clouds permitting), whether it's partial or total.

The following statistics are extracted from the 5,000 year eclipse catalog:

The database contains 23962 eclipses over 5000 years, from -1999 (2000 BC) to 3000 AD. There are between 4 and 7 eclipses in any calendar year; with an average of 4.79 eclipses per year.

There are:

- 2401 years with 4 eclipses (48.0%, 1 in 2.08 years)
- 1388 years with 5 eclipses (27.8%, 1 in 3.60 years)
- 1059 years with 6 eclipses (21.2%, 1 in 4.72 years)
- 152 years with 7 eclipses (3.0%, 1 in 32.89 years)

7 eclipses occur in 1908, 1917, 1935, 1973, 1982, 2038, 2094, among others.

The database contains 10536 complete eclipse seasons.

There are:

- 7649 eclipse seasons with 2 eclipses (72.6%, 1 in 1.38 seasons)
- 2887 eclipse seasons with 3 eclipses (27.4%, 1 in 3.65 seasons)

This table shows the number of eclipse seasons which contained each combination of eclipse types:

Number | First Eclipse | Second Eclipse | Third Eclipse | Rate |
---|---|---|---|---|

179 seasons |
penumbral lunar | annular solar | 1 in 58.86 | |

57 seasons |
penumbral lunar | hybrid solar | 1 in 184.84 | |

462 seasons |
penumbral lunar | total solar | 1 in 22.81 | |

1122 seasons |
partial lunar | annular solar | 1 in 9.39 | |

167 seasons |
partial lunar | hybrid solar | 1 in 63.09 | |

13 seasons |
partial lunar | partial solar | 1 in 810.46 | |

782 seasons |
partial lunar | total solar | 1 in 13.47 | |

178 seasons |
total lunar | annular solar | 1 in 59.19 | |

12 seasons |
total lunar | hybrid solar | 1 in 878.00 | |

730 seasons |
total lunar | partial solar | 1 in 14.43 | |

127 seasons |
total lunar | total solar | 1 in 82.96 | |

160 seasons |
annular solar | penumbral lunar | 1 in 65.85 | |

1147 seasons |
annular solar | partial lunar | 1 in 9.19 | |

178 seasons |
annular solar | total lunar | 1 in 59.19 | |

85 seasons |
hybrid solar | penumbral lunar | 1 in 123.95 | |

124 seasons |
hybrid solar | partial lunar | 1 in 84.97 | |

5 seasons |
hybrid solar | total lunar | 1 in 2107.20 | |

749 seasons |
partial solar | total lunar | 1 in 14.07 | |

432 seasons |
total solar | penumbral lunar | 1 in 24.39 | |

801 seasons |
total solar | partial lunar | 1 in 13.15 | |

139 seasons |
total solar | total lunar | 1 in 75.80 | |

941 seasons |
penumbral lunar | annular solar | penumbral lunar | 1 in 11.20 |

24 seasons |
penumbral lunar | annular solar | partial lunar | 1 in 439.00 |

118 seasons |
penumbral lunar | hybrid solar | penumbral lunar | 1 in 89.29 |

416 seasons |
penumbral lunar | total solar | penumbral lunar | 1 in 25.33 |

27 seasons |
partial lunar | annular solar | penumbral lunar | 1 in 390.22 |

1347 seasons |
partial solar | total lunar | partial solar | 1 in 7.82 |

6 seasons |
partial solar | total lunar | total solar | 1 in 1756.00 |

8 seasons |
total solar | total lunar | partial solar | 1 in 1317.00 |

There are:

- 11898 solar eclipses altogether (2.38 per year)
- 3173 total solar eclipses (26.7%, 1 every 1.58 years)
- 569 hybrid eclipses (4.8%, 1 every 8.79 years)
- 3956 annular eclipses (33.2%, 1 every 1.26 years)
- 4200 partial eclipses (35.3%, 1 every 1.19 years)

There are:

- 3625 years with 2 solar eclipses (72.5%, 1 in 1.38 years)
- 877 years with 3 solar eclipses (17.5%, 1 in 5.70 years)
- 473 years with 4 solar eclipses (9.5%, 1 in 10.57 years)
- 25 years with 5 solar eclipses (0.5%, 1 in 200.00 years)

Since year 1000, 5 solar eclipses occur in 1255, 1805, 1935, 2206, 2709, 2774, 2839, 2904.

There is a maximum of 2 total solar eclipses in any calendar year.

There are:

- 1856 years with 0 total solar eclipses (37.1%, 1 in 2.69 years)
- 3115 years with 1 total solar eclipses (62.3%, 1 in 1.61 years)
- 29 years with 2 total solar eclipses (0.6%, 1 in 172.41 years)

Since year 1000, 2 total solar eclipses occur in 1014, 1209, 1358, 1535, 1554, 1712, 1889, 2057, 2252, 2429, 2606, 2801, 2996.

There are 1361 double solar eclipse seasons (1 in 3.67 years); of which 14 involve a total eclipse (1 in 357.14 years):

The database contains solar eclipses from saros series -13 to 190. There are 204 complete saros series (and 83 partial series). The number of eclipses in a series ranges from 70 (Saros 104, 116, 122, 123, 131, 137, 138, 141, 144) to 86 (Saros 34, 52).

There are:

- 12064 lunar eclipses altogether (2.41 per year)
- 3479 total lunar eclipses (28.8%, 1 every 1.44 years)
- 4207 partial eclipses (34.9%, 1 every 1.19 years)
- 4378 penumbral eclipses (36.3%, 1 every 1.14 years)

Of the 4378 penumbral eclipses, 141 are total penumbral eclipses (ie. penumbral magnitude >= 1.000); this is 3.2% of the penumbral eclipses, or 1.2% of all lunar eclipses; 1 every 35.46 years.

There are:

- 3541 years with 2 lunar eclipses (70.8%, 1 in 1.41 years)
- 887 years with 3 lunar eclipses (17.7%, 1 in 5.64 years)
- 539 years with 4 lunar eclipses (10.8%, 1 in 9.28 years)
- 33 years with 5 lunar eclipses (0.7%, 1 in 151.52 years)

Since year 1000, 5 lunar eclipses occur in 1181, 1246, 1311, 1676, 1694, 1749, 1879, 2132, 2262, 2400, 2653, 2783, 2968.

There is a maximum of 3 total lunar eclipses in any calendar year.

There are:

- 2971 years with 0 total lunar eclipses (59.4%, 1 in 1.68 years)
- 604 years with 1 total lunar eclipses (12.1%, 1 in 8.28 years)
- 1400 years with 2 total lunar eclipses (28.0%, 1 in 3.57 years)
- 25 years with 3 total lunar eclipses (0.5%, 1 in 200.00 years)

Since year 1000, 3 total lunar eclipses occur in 1414, 1479, 1544, 1917, 1982, 2485, 2550, 2615.

There are 1527 double lunar eclipse seasons (1 in 3.27 years); of which none involve a total eclipse.

The database contains lunar eclipses from saros series -20 to 183. There are 204 complete saros series (and 84 partial series). The number of eclipses in a series ranges from 70 (Saros 126) to 86 (Saros 47, 65).