title:: Panchang Software Tools Reference Guide tags:: Panchang, Software, Tools, Reference audience:: All levels

Panchang Software Tools Reference Guide

Overview

This guide provides comprehensive information on all software tools useful for Panchang study, from beginner-friendly apps to professional research tools.

1. Planetarium Software

Stellarium (Free, Open Source)

Best For: Visual learning, sky observation, Nakshatra identification

Stellarium Web (Browser Version):

Access at stellarium-web.org

• Same features as desktop
• No installation required
• Works on tablets/phones

SkySafari (Commercial, Mobile)

Best For: Mobile stargazing, field observation

• Indian constellation names
• Ecliptic coordinates
• Moon phase display
• Planet position tables

Cartes du Ciel (Free, Open Source)

Best For: Deep sky charting, technical astronomy

• Detailed star charts
• Ecliptic overlay
• Customizable labels
• Print capability

TheSkyX (Commercial)

Best For: Professional astronomy, research

• Telescope control
• CCD imaging
• Professional ephemeris
• Scripting capability

2. Vedic Astrology / Panchang Software

Jagannatha Hora (JHora) (Free)

Best For: Comprehensive Vedic astrology, Panchang calculations

Ayanamsha Options:

DrikPanchang (Free, Web/Mobile)

Best For: Daily Panchang, festival calendar, quick reference

Parashara's Light (Commercial)

Best For: Professional Vedic astrology, advanced analysis

Kundli Chakra (Commercial)

Best For: Birth charts, Panchang, transit analysis

Solar Fire (Commercial, Western + Vedic)

Best For: Cross-system comparison (Western + Vedic)

• Western and Vedic astrology
• Bi-wheel charts
• Animated charts
• Asteroid database
• Fixed stars

3. Calculation Libraries

Swiss Ephemeris (Free, Open Source)

Best For: High-precision astronomical calculations

pip install pyswisseph

Basic Usage:

import swisseph as swe

Set ephemeris path
swe.set_ephe_path('ephe')

Get Julian Day
jd = swe.julday(2026, 7, 2, 12.0)

Get Sun position
sun = swe.calc_ut(jd, swe.SUN)
print(f"Sun longitude: {sun[0][0]:.4f}°")

Get Moon position
moon = swe.calc_ut(jd, swe.MOON)
print(f"Moon longitude: {moon[0][0]:.4f}°")

Get Ayanamsha (Lahiri)
aya = swe.get_ayanamsa(jd)
print(f"Ayanamsha: {aya:.4f}°")

Skyfield (Free, Python)

Best For: Modern astronomical calculations

pip install skyfield

Basic Usage:

from skyfield import api
from skyfield import almanac

ts = load.timescale()
eph = load('de421.bsp')
t = ts.utc(2026, 7, 2, 12)
sun = eph['sun']
moon = eph['moon']
astrometric = earth.at(t).observe(moon)
ra, dec, distance = astrometric.radec()

Astropy (Free, Python)

Best For: General astronomy, coordinate transformations

pip install astropy

Coordinate Example:

from astropy.coordinates import get_sun, get_moon, EarthLocation
from astropy.time import Time
import astropy.units as u

t = Time('2026-07-02T12:00:00')
loc = EarthLocation(lat=28.6u.deg, lon=77.2u.deg)
sun = get_sun(t)
moon = get_moon(t)

4. Mobile Apps

Android Apps

iOS Apps

5. Online Tools

Web-Based Calculators

Ephemeris Data Sources

6. Programming Libraries

Python Libraries

JavaScript Libraries

Calculation Example (Python)

from datetime import datetime
import swisseph as swe

def calculate_panchang(date, lat, lon, ayanamsha='lahiri'):
    """
    Calculate complete Panchang for given date and location.
    """
    # Convert to Julian Day
    jd = swe.julday(date.year, date.month, date.day, 
                    date.hour + date.minute/60.0)
    
    # Set Ayanamsha
    if ayanamsha == 'lahiri':
        swe.set_sid_mode(swe.SIDM_LAHIRI)
    
    # Get positions
    sun = swe.calc_ut(jd, swe.SUN, swe.FLG_SIDEREAL)
    moon = swe.calc_ut(jd, swe.MOON, swe.FLG_SIDEREAL)
    
    sun_long = sun[0][0]
    moon_long = moon[0][0]
    
    # Calculate Tithi
    elongation = (moon_long - sun_long) % 360
    tithi_num = int(elongation / 12) + 1
    paksha = "Shukla" if tithi_num <= 15 else "Krishna"
    if tithi_num > 15:
        tithi_num -= 15
    
    # Calculate Nakshatra
    nak_num = int(moon_long / 13.333) + 1
    pada = int((moon_long % 13.333) / 3.333) + 1
    
    # Calculate Yoga
    combined = (sun_long + moon_long) % 360
    yoga_num = int(combined / 13.333) + 1
    
    # Calculate Karana
    karana_num = int(elongation / 6) + 1
    
    return {
        'date': date,
        'tithi': tithi_num,
        'paksha': paksha,
        'nakshatra': nak_num,
        'pada': pada,
        'yoga': yoga_num,
        'karana': karana_num,
        'sun_longitude': sun_long,
        'moon_longitude': moon_long
    }
Example usage
date = datetime(2026, 7, 2, 12, 0)
result = calculate_panchang(date, 28.6, 77.2)
print(result)

7. Hardware Tools

Telescopes for Moon Observation

Recommended for Panchang Study

For observing Moon phases and Nakshatra stars:

• Binoculars: 10x50 or 12x50 ($50-100)
• Small Telescope: 70mm refractor ($100-200)

8. Reference Books

Beginner

• Astronomy: A Self-Teaching Guide by Dinah Moche
• NightWatch by Terence Dickinson
• The Stars by H.A. Rey

Intermediate

• Astronomical Algorithms by Jean Meeus
• Vedic Astroscopy by B.V. Raman
• Surya Siddhanta translation by P.C. Sengupta

Advanced

• Fundamentals of Celestial Mechanics by J.M.A. Danby
• Planetary Programs and Tables by Pierre Bretagnon
• Indian Astronomy: A Source Book by B.V. Subbarayappa

Quick Reference Table

This guide is part of the Panchang series. See also: Panchang Associate Book, Panchang Bachelor Book, Panchang Master Book, Panchang PhD Monograph.