Comprehensive Blog on Vedic Astrology (Jyotish)


Archive for the 'Vedic Calendar' Category

November 4th, 2006

Hindu Festivals

One of my fellow bloggers, Srinivas Shastri wanted to find out if there was a way to find out the day Dussehra occurred in 1916. This is essentially a problem of calendar conversion and a lot of research has gone into this. For quick reference to find it out, I use this website – I would love to include this information in my panchanga applet and birth chart generation applet. However, I do not have source code of such an algorithm. If any of you can help me understand the lisp code in this paper Indian Calendrical Calculations and convert it to Java, I would really appreciate it.

As mentioned in the post about the panchanga, tithi is essentially angular distance between the Moon and Sun modulus 180 divided by 15. In Shukla paksh, i.e. the bright half of the month, the distance increases from 0

October 6th, 2006

Panchanga Calculations

This post is nothing but reiteration of what I have already mentioned in the panchanga.html page. It is just for the sake of completeness.

Panchanga or Panchang is Hindu Almanac. The literal translation of Panchanga is “Five Limbs”. The five energies it represents are considered for selecting an appropriate and auspicious time for ceremonies or certain actions. Panchanga is consulted in matters of timing, i.e. calculating muhurta concerning marriage, education, travel and agriculture to name a few. It is very interesting to note the importance given to Sun and Moon in ascertaining a good time. While fixing a muhurta, we cannot possibly choose a time that is perfect in all respects, we therefore should try to choose a time that would do more good than bad.

The five limbs and a brief description is as follows:

  1. Tithi (along with Paksha): A tithi means a lunar day. A lunar day is about 0.95 of a normal day. When the Sun and Moon are closer to each other, it is Amavasya and when they are 180 degrees apart, it becomes Poornima. To calculate a tithi, we need to find out the difference between the longitudes of Moon and Sun and divide the difference by 15. This will tell us what the tithi is. When the Moon is moving towards the Sun, it is called Krishna Paksha, otherwise its Shukla Paksha.
  2. Vaar (Day of the weeks): The days of the week along with the ruler planet in the brackets are – Sunday (Sun), Monday (Moon), Tuesday (Mars), Wednesday (Mercury), Thursday (Jupiter), Friday (Venus) and Saturday (Saturn).
  3. Nakshatra (Constellation): Apart from the 12 signs, there are 27 constellations that are like “mansions” or “houses”. The planets visit these houses while on their journeys through the skies. Nakshatra is a generic term and all planets are in one Nakshatra or the other at any given time. However, when someone says Janma Nakshatra or daily Nakshatra, he/she specifically means Moon Nakshatra. In a panchanga, to calculate a nakshatra, we need to take the longitude of the moon and divide it by 360/27, i.e 13 1/3.
  4. Yoga: Yoga means combination. In this context of Panchanga, it means it means a particular combination of Moon and Sun. This combination is said to affect a person’s health.
  5. Karana: Karana means half a lunar day. There are 11 Karanas.

The reason I have not mentioned the steps for calculations for Yoga and Karana not because they are complicated but because they do not (or I am not able to guess!) any beauty behind the calculations.

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