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Where ancient astronomical wisdom meets modern computation
Dekho Panchang is built and maintained by Aditya Kumar – a Maithil Brahmin with deep roots in the Vedic tradition.
This project was born from a simple conviction: that the astronomical and astrological wisdom preserved in texts like the Surya Siddhanta and Brihat Parashara Hora Shastra deserves to be accessible to everyone – not locked behind paywalls or simplified beyond recognition.
Every calculation on this site is done from first principles. Planetary positions use Jean Meeus's astronomical algorithms. Panchang elements are computed using classical Jyotish rules. There are no external astrology APIs – just mathematics, the same mathematics our ancestors encoded thousands of years ago, now running in your browser.
This is a passion project, not a corporation. If you find value in it, that is the best reward.
Daily Tithi, Nakshatra, Yoga, Karana, and Muhurta timings computed for your exact location using astronomical algorithms verified within 1-2 minutes of reference sources.
25+ analysis modules: Vimshottari/Ashtottari/Yogini Dashas, Shadbala (6-fold strength), Ashtakavarga, 16 divisional charts (D1-D60), 144 yoga patterns, KP System (Placidus sub-lords), Jaimini Karakas, Avasthas, Argala, Bhava Chalit – plus AI-powered chart chat. Computed locally from Swiss Ephemeris, no external APIs.
Primary engine: Swiss Ephemeris powered by NASA JPL DE441 planetary ephemeris – arcsecond accuracy for all 9 planets, the same data used by NASA for spacecraft navigation. Meeus algorithms as fallback. No black-box APIs – open, verifiable astronomical computation.
Your birth data stays yours. We use Supabase with Row Level Security – users can only access their own data. No selling personal information to third parties.
Available in 10 languages including Hindi, Tamil, Bengali, Telugu, Kannada, Marathi, Gujarati, Maithili, and Sanskrit. Real translations, not machine-generated.
A structured curriculum covering everything from Panchang basics to advanced Jaimini Jyotish, Shadbala, KP System, and Ashtakavarga – free for everyone.
Swiss Ephemeris v2.10 powered by NASA JPL DE441 – the same planetary ephemeris used by NASA for spacecraft navigation. Sub-arcsecond accuracy for Sun, Moon, and all planets including true lunar nodes (Rahu/Ketu).
Lahiri (Chitrapaksha) Ayanamsha as default – the Indian government standard used by the Indian Astronomical Ephemeris. Krishnamurti Ayanamsha available for KP System analysis.
3,005 automated tests covering panchang accuracy, kundali computation, dasha periods, yoga detection, and festival dates. Regularly cross-verified against professional Hindu almanacs and authoritative panchang sources for multiple locations worldwide.
Swiss Ephemeris atmospheric refraction model accounting for observer elevation, temperature, and pressure. Verified within ±1 minute of professional panchang sources across Delhi, Bangalore, and New York.
Indian Jyotish is a two-layer system. The foundation is Siddhantic Jyotish – mathematical astronomy of the highest order, computing planetary positions with precision that modern instruments have confirmed. Upon this foundation stands Phalit Jyotish – the interpretive framework that maps cosmic patterns to human experience. This site implements both layers with equal rigour: the astronomy engine uses algorithms from the Surya Siddhanta and Jean Meeus, verified against NASA's JPL ephemeris; the interpretive modules follow Parashara, Jaimini, and the Muhurta Chintamani.
The Surya Siddhanta (c. 400 CE) is one of the most remarkable astronomical texts in human history. It accurately calculates the sidereal year at 365.2563627 days – a figure astonishingly close to the modern value of 365.25636 days. It provides precise formulas for planetary positions, eclipse predictions, and the precession of equinoxes.
Aryabhata (476 CE) proposed that the Earth rotates on its axis – over a millennium before Copernicus. His Aryabhatiya contains sophisticated sine tables, pi accurate to 4 decimal places (3.1416), and algorithms for planetary calculations still admired today.
The Panchang ("five limbs") is a lunisolar calendar tracking five astronomical elements: Tithi (lunar day), Nakshatra (lunar mansion), Yoga (luni-solar angle), Karana (half-tithi), and Vara (weekday). It simultaneously tracks the Moon's position relative to the Sun and against fixed stars.
Indian astronomy accounts for precession of equinoxes through Ayanamsha – the angular difference between tropical and sidereal zodiacs. This ~50.3 arc-seconds/year precession completes one cycle in ~25,920 years. The Lahiri Ayanamsha is ~24 degrees currently.
Indian astronomers identified Rahu and Ketu as the ascending and descending nodes of the Moon's orbit – where eclipses occur. The Saros cycle (~18 years) was independently discovered. Ancient eclipse computation tables show remarkable accuracy when verified against modern calculations.
We would love to hear from you. Whether you have a question about our calculations, want to report a bug, or just want to say hello – reach out.
General inquiries
hello@dekhopanchang.comPrivacy & data requests
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legal@dekhopanchang.comWe typically respond within 48 hours.
Dekho Panchang — dekhopanchang.com