The inex is an eclipse cycle of 10,571.95 days. The cycle was first described in modern times by Crommelin in 1901, but was named by George van den Bergh who studied it in detail half a century later. One inex after an eclipse of a particular saros series there will be an eclipse in the next saros series, unless the latter saros series has come to an end. It corresponds to: • 10,571.95 solar days • 28.95 years • 358 synodic months • 388.50011 draconic months • 30.50011 eclipse years • 383.67351 anomalistic months • 386.94 sidereal months • 8 eclipse sets__###newline###__ The 30.5 eclipse years means that if there is a solar eclipse, then after one inex a New Moon will take place at the opposite node of the orbit of the Moon, and under these circumstances another eclipse can occur. Unlike the saros, the inex is not close to an integer number of anomalistic months so successive eclipses are not very similar in their appearance and characteristics. Read more
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