Conversion Center
Search a unit
Convert point (medieval time unit) to callippic cycle
Selected category: time.
Definition and details for point (medieval time unit):
Point (time) is a medieval unit of time equal to 1/5 hour, or 12 minutes. One point was divided into 8 moments. One moment was equal to 1.5 minutes or 90 seconds.
Definition and details for callippic cycle:
Callippic cycle, in astronomy and calendar studies, is a particular approximate common multiple of the the tropical year and the synodic month. It was proposed by Callippus in 330 BC. Callippic cycle is a period of 76 years, as an improvement on the 19-year Metonic cycle.
A Metonic cycle was invented by Meton and lasts 6940 days. This means that a solar year is 365 d 6 h 18 min 56 s, but Callippus knew that year length was more closely to 365 + 1/4 days. So he multiplied the 19-year cycle by 4 to reach an integer number of days and dropped 1 day from the last 19-year cycle. Thus he constructed a cycle of 76 years that contains 940 lunations or 27,759 days.
A Metonic cycle was invented by Meton and lasts 6940 days. This means that a solar year is 365 d 6 h 18 min 56 s, but Callippus knew that year length was more closely to 365 + 1/4 days. So he multiplied the 19-year cycle by 4 to reach an integer number of days and dropped 1 day from the last 19-year cycle. Thus he constructed a cycle of 76 years that contains 940 lunations or 27,759 days.
Swap, do a callippic cycle to point (medieval time unit) conversion.
