The Callippic cycle is 76 years long, four Metonic cycles.
2.
The Greek astronomer Callippus continued the work of Meton, proposing what is now termed the Callippic cycle.
3.
The Callippic cycle is four Metonic cycles, and this dial indicates which of the four Metonic cycles is the current one in the Callippic cycle.
4.
The Callippic cycle is four Metonic cycles, and this dial indicates which of the four Metonic cycles is the current one in the Callippic cycle.
5.
The Mechanism has a dial for the Callippic cycle and the 76 years are mentioned in the Greek text of the manual of this old device.
6.
The first year of the first Callippic cycle began at the summer solstice of 330 BC ( 28 June in the proleptic Julian calendar ), and was subsequently used by later astronomers.
7.
The Callippic cycle of 76 years appears to be used in the Antikythera mechanism, an ancient astronomical mechanical clock and observational aide of the 2nd century BC ( discovered in Mediterranean waters off Greece ).
8.
VII 3, H25 ) observations by Timocharis during the 47th year of the first Callippic cycle ( 283 BC ), when on the eighth of Anthesterion, the Pleiades star cluster was occulted by the Moon.
9.
If the Callippic cycle is considered as closer to its unrounded length of days ( based on 940 lunations ) then its accuracy is essentially the same as the unrounded Metonic cycle ( within a few seconds per year ).
10.
The Metonic cycle has 19 tropical years and 235 synodic months in 6940 days . The Callippic cycle synchronizes days per orbit and rotations per orbit within the Metonic cycle, noting the difference of one after 4 Metonic cycles, a duration of 76 years.
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