QUESTION: So if I am understanding correctly, you calculate the signs using tropical astro and nakshatras using Vedic?
“Vedic” means “belonging to the Veda,” it doesn’t mean “sidereal.”
I calculate as I have understood the Sūrya Siddhānta and Vedic Purāṇa: tropical for signs and with ayanāṁśa for the sidereal nakṣatra.
QUESTION: How is puranic or siddhantic astro different than Vedic/ sidereal astrology? I do understand tropical vs sidereal.
The Purāṇas are the Fifth Veda, as confirmed in Caṇḍogya Upaṇiṣad and elsewhere. Sūrya Siddhānta is the fundamental astronomical text from India’s antiquity. As far as how to calculate the rāśi signs and nakṣatra stars, the Siddhānta does not deviate from the Purāṇas, so we can call the Siddhānta “Vedic” as well, in that context.
The term “Vedic astrology” is a slang used to mean “Indian astrology.” The majority of Indian astrology today uses a nakṣatra / sidereal based version of the rāśi / signs. One significant difference between actual “Vedic” astrology and what is commonly referred to as “Vedic astrology” is therefore the laters not recognizing the difference between rāśi and nakṣatra and therefore using ayanaṁśa for rāśi, arriving at a sidereal zodiac.
There may be other differences in so far as modern Indian astrology deviates from the definitions, principles and techniques defined in the fundamental texts. However, there really are not Vedic texts for Jātaka Jyotiṣa, so for these we rely on classical texts like Bṛhāt Parāśara Hora Śāstra, Phaladīpikā, etc.
QUESTION: What is jataka?
ज (ja) means “coming into being.” Jāti means “pertaining to birth.” Jātaka Jyotiṣa is “Natal astrology” – i.e. astrology for predicting or describing the details of an individual’s life and character based on their birth chart.
– Vic DiCara (www.vicdicara.com)