Siddhanta Parity API Documentation - v1.3.0
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    • Get the Solar Month Sign (Rashi index).

      [Ch. I, v.13]

      Siddhantic Proof: Madhyama (Mean Motions) v.13

      Sanskrit (Devanagari):

      तद्द्वद्वात्रिंशता तिथिभिश्चान्द्रो मासस्तत्र ।... मासेर्द्वादशभिर्वर्षं दिव्यं तदह उच्यते ॥

      Translation (Burgess):

      Twelve months make a year, which is called a day and night of the gods (Devaratripa).

      Modern Technical Commentary:

      Establishes the year as the fundamental solar cycle. It also introduces the 'Divine Day' concept where one human solar year corresponds to a single day for the gods, centered on the North/South poles (Meru).

      Siddhantic Proof: Madhyama (Mean Motions) v.13

      Sanskrit (Devanagari):

      तद्द्वद्वात्रिंशता तिथिभिश्चान्द्रो मासस्तत्र ।... मासेर्द्वादशभिर्वर्षं दिव्यं तदह उच्यते ॥

      Translation (Burgess):

      Twelve months make a year, which is called a day and night of the gods (Devaratripa).

      Modern Technical Commentary:

      Establishes the year as the fundamental solar cycle. It also introduces the 'Divine Day' concept where one human solar year corresponds to a single day for the gods, centered on the North/South poles (Meru).

      Returns the sign occupied by the Sun's true longitude.

      Parameters

      • ahargana: number

        Current day count

      • OptionalrawSunLong: number

      Returns number

      1-based Rashi index (1=Mesha, ..., 12=Meena)