search

jyotisham / jyotisha

Python tools for the astronomical / astrological vedAnga of Hindus
MIT License
88 stars 53 forks source link

Accurate saMvatsara-skipping logic #83

Open vvasuki opened 3 years ago

vvasuki commented 3 years ago

The ancient text Surya Siddhanta calculates the Jovian year to be about 361.026721 days or about 4.232 days shorter than the Earth-based solar year.[3] This difference requires that about once every 85 solars years (~ 86 jovian years), one of the named samvatsara is expunged (skipped as a shadow year), to synchronize the two calendars.[4] However, the details of the synchronization varies slightly between the north and south Indian calendars.[5]

Particularly important for deciphering inscriptions. Must find out and implement this logic.

vvasuki commented 3 years ago

Looks like the problem is not as critical for south India since accuracy of saMvatsara assignment has degenerated for over a millennium (come on Southies - not again!) as per pg 37 here.