Upstellar Astrology
Calculators
Birth Natal Chart Ascendant / Rising Sign Astro Portrait Personal Daily Horoscope Transit Chart Synastry Secondary Progressions Solar Arc & Returns Composite & Davison Traditional Astrology Sidereal / Vedic Asteroids Draconic Chart Astro Calendar Ephemeris Tables Retrograde Planets Aspect Search Engine AstroCartography Electional Astrology Moon Calendar Full Moons & New Moons Eclipses Void of Course Moon Arabic Parts & Lots Fixed Stars Sabian Symbols Numerology Love Compatibility API Documentation
All tools & roadmap
Natal Chart Synastry
Upstellar
Home Natal Chart Synastry
Calculators
Birth Natal Chart Ascendant / Rising Sign Astro Portrait Personal Daily Horoscope Transit Chart Synastry Secondary Progressions Solar Arc & Returns Composite & Davison Traditional Astrology Sidereal / Vedic Asteroids Draconic Chart Astro Calendar Ephemeris Tables Retrograde Planets Aspect Search Engine AstroCartography Electional Astrology Moon Calendar Full Moons & New Moons Eclipses Void of Course Moon Arabic Parts & Lots Fixed Stars Sabian Symbols Numerology Love Compatibility API Documentation
Real ephemeris · no sign-up

Astrological precision, delivered.

Natal charts, transits, synastry and two dozen more astrology tools — each computed from a precise in-house ephemeris, accurate to the arcminute. No third parties, no accounts.

Cast your birth chart → Synastry
Charts & Calculators
Birth Natal Chart
Full natal wheel, planet positions, houses & aspects.
Ascendant / Rising Sign
Rising sign, Midheaven and house angles.
Astro Portrait
Sun, Moon & Ascendant snapshot with meaning.
Personal Daily Horoscope
Today's transits to your natal chart.
Transit Chart
Current planets over your natal chart.
Synastry
Two charts overlaid with inter-aspects.
Secondary Progressions
Day-for-a-year progressed chart.
Solar Arc & Returns
Solar arc directions, solar & lunar returns.
Composite & Davison
Relationship midpoint & time/space charts.
Traditional Astrology
Hellenistic / classical techniques.
Sidereal / Vedic
Sidereal zodiac & Janam Kundali.
Asteroids
Ceres, Pallas, Juno, Vesta, Chiron & more.
Draconic Chart
Chart relative to the lunar nodes.
Calendars & Ephemeris
Astro Calendar
Monthly & annual aspect calendar.
Ephemeris Tables
Planetary positions 1800-2100.
Retrograde Planets
Retrograde periods & shadow zones.
Aspect Search Engine
Find dates matching aspect criteria.
AstroCartography
Relocation lines on a world map.
Electional Astrology
Find favorable chart timing.
Moon
Moon Calendar
Daily Moon sign & phase.
Full Moons & New Moons
Lunation dates & next full Moon.
Eclipses
Solar & lunar eclipse calendar.
Void of Course Moon
VoC Moon periods.
Esoteric
Arabic Parts & Lots
Hermetic Lots: Fortune, Spirit, Love, Marriage & more.
Fixed Stars
Conjunctions to Algol, Spica, Regulus, Antares & more.
Sabian Symbols
360 symbolic degree images for your natal planets.
Numerology
Life Path, Expression, Soul Urge & Personality number.
Relationship
Love Compatibility
Horoscope matching score.
Developers
API Documentation
Use our astrology calculations in your own apps.

How it works

Planet positions come from analytic planetary theory; the Moon from a high-order lunar series; houses are solved directly from sidereal time, obliquity and your latitude — every result cross-checked against JPL ephemerides to the arcsecond.