Function calculateKarana

calculateKarana(ahargana: number): { index: number; name: string }
Calculate the Karana (Half-Tithi).

[Ch. II, v.67-68]

Siddhantic Proof: Spashta (True Longitudes) v.67

Sanskrit (Devanagari):

ध्रुवाणि शकुनिर्नागं तृतीयं तु चतुष्पदम्‌।

Translation (Burgess):

The fixed (dhruva) Karanas are Shakuni, Naga, and the third is Chatushpada.

Siddhantic Proof: Spashta (True Longitudes) v.67

Sanskrit (Devanagari):

ध्रुवाणि शकुनिर्नागं तृतीयं तु चतुष्पदम्‌।

Translation (Burgess):

The fixed (dhruva) Karanas are Shakuni, Naga, and the third is Chatushpada.

A Karana is exactly half of a Tithi (6° arc). There are 11 distinct names that cycle through the 60 Karanas of a lunar month in a fixed pattern.
Parameters
- ahargana: number
  Current day count
Returns { index: number; name: string }
Current Karana index and name