Upstellar Astrology
Calculators
Birth Natal Chart Ascendant / Rising Sign Astro Portrait Personal Daily Horoscope Transit Chart Transit Forecast Annual Profections Saturn Return Synastry Secondary Progressions Solar Arc & Returns Composite & Davison Traditional Astrology Sidereal / Vedic Nakshatra Birth Star Vimshottari Dasha Dominant Planet Natal Moon Phase Decans Asteroids Draconic Chart Astro Calendar Ephemeris Tables Retrograde Planets Aspect Search Engine Multi-Aspect Finder AstroCartography Electional Astrology Planetary Hours Moon Calendar Full Moons & New Moons Eclipses Void of Course Moon Arabic Parts & Lots Fixed Stars Sabian Symbols Numerology Chinese Zodiac Mayan Tzolkin Sign Celtic Tree Astrology Native American Totem Birthstone & Crystals Angel Numbers Biorhythm Love Compatibility Sun Sign Compatibility Reverse Synastry API Documentation
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Natal Chart Synastry
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Home Natal Chart Synastry
Calculators
Birth Natal Chart Ascendant / Rising Sign Astro Portrait Personal Daily Horoscope Transit Chart Transit Forecast Annual Profections Saturn Return Synastry Secondary Progressions Solar Arc & Returns Composite & Davison Traditional Astrology Sidereal / Vedic Nakshatra Birth Star Vimshottari Dasha Dominant Planet Natal Moon Phase Decans Asteroids Draconic Chart Astro Calendar Ephemeris Tables Retrograde Planets Aspect Search Engine Multi-Aspect Finder AstroCartography Electional Astrology Planetary Hours Moon Calendar Full Moons & New Moons Eclipses Void of Course Moon Arabic Parts & Lots Fixed Stars Sabian Symbols Numerology Chinese Zodiac Mayan Tzolkin Sign Celtic Tree Astrology Native American Totem Birthstone & Crystals Angel Numbers Biorhythm Love Compatibility Sun Sign Compatibility Reverse Synastry API Documentation
Real ephemeris · no sign-up

The cosmos, decoded.

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.
Transit Forecast
Dated timeline of upcoming transits to your chart.
Annual Profections
Your time-lord year, activated house & Lord of the Year.
Saturn Return
Exact dates of your Saturn returns and what each asks.
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.
Nakshatra Birth Star
Your Moon's lunar mansion, pada, ruler & deity.
Vimshottari Dasha
Your Vedic planetary-period life timeline.
Dominant Planet
The planet, element & modality that rule your chart.
Natal Moon Phase
Your lunation type & soul pattern (8 phases).
Decans
Your Sun, Moon & Rising decans and sub-rulers.
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.
Multi-Aspect Finder
Stack several aspects, find every date they line up.
AstroCartography
Relocation lines on a world map.
Electional Astrology
Find favorable chart timing.
Planetary Hours
Chaldean day & night hour rulers for any place.
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.
Chinese Zodiac
Your lunar animal, element & yin/yang with compatibility.
World Zodiacs & Crystals
Mayan Tzolkin Sign
Your sacred Maya day-sign & galactic tone.
Celtic Tree Astrology
Your Druid birth tree and its meaning.
Native American Totem
Your Medicine Wheel birth totem & clan.
Birthstone & Crystals
Your zodiac gemstone, crystals & lucky metal.
Angel Numbers
Decode the repeating numbers you keep seeing.
Biorhythm
Physical, emotional & intellectual cycles for any day.
Relationship
Love Compatibility
Horoscope matching score.
Sun Sign Compatibility
Quick two-sign love match — no birth time needed.
Reverse Synastry
Find the birth dates of people who fit your chart.
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.