A private map of the birth sky
Your sky, drawn as coordinates—not a verdict.
Calculate the Sun, Moon, planets, angles, equal houses, and major aspects in this browser. Your birth details are not submitted, stored, placed in the URL, or sent to analytics.
Draw my chart
Birth coordinates
Set the clock and horizon
Exact time is required only for the Ascendant, Midheaven, and houses. If it is unknown, choose the honest date-only mode.
Calculated chart
Your natal atlas
Planetary coordinates
What acts—and where
Equal houses
Where the pattern lands
Major angular relationships
How the functions meet
Element and modality counts
The chart's visible balance
Take this result with you
Only the visible result is included. Names, birth details, questions, and private notes stay out.
Nothing is shared until you choose an action.
Continue in the app ↗
Method, uncertainty, boundary
A chart is reproducible only when the choices are visible.
- 01Astronomical positions
Geocentric apparent longitudes come from Astronomy Engine 2.1.19. Signs use the tropical zodiac and the equinox of date.
- 02Time and place
The selected city's historical IANA time zone converts local civil time to UTC. Coordinates set the local horizon.
- 03Houses and aspects
Houses are twelve equal 30° sectors from the Ascendant. Major aspects use disclosed orbs: conjunction/opposition 6°, square/trine 5°, sextile 4°.
- 04Unknown-time mode
We use local noon only as a reference for planets, check the Moon across the local date, and omit the Ascendant, Midheaven, and houses. It is not rectification.