How accurate is the birth chart?

Accuracy varies by body and date. The core planets and luminaries use published astronomical methods; Pluto and Chiron have wider, date-dependent limits. The supported chart range is 1800–2200.

What leaves my device?

Birth date, time and chart calculations stay in your browser. Place search sends the place text to Open-Meteo to resolve coordinates. Saved charts remain in local storage on this device.

Can I save the chart?

Yes. Save it to this device, export the data or artwork, share a private chart link, open the seven-chapter natal reading, or carry the chart into the 12 August eclipse contact tool.

Your minute, then the sitting

Date, town, and the hour if you have it. The chart is the receipt. The seven chapters are the sitting.

Date, place & time

Birth Date

Please enter your birth date.

Start here — the sky on your day.

Birth City

Please select a city from the dropdown.

Pick a result for precise coordinates — a typed city name alone is not enough. The location button sends coordinates to Open-Meteo for timezone lookup only.

Birth Time — optional

Exact time unlocks the Moon, Rising, MC and houses. Leave blank if unknown — time-sensitive placements will be withheld.

Time unknown · Moon, Rising, MC and houses will be withheld.

Name this chart (optional)

Labels saved charts and exports. Blank = “Birth Chart”.

The chart calculation stays on your device. Place search sends the place text to Open-Meteo to find coordinates.

Advanced chart options

Time of Day — tap to approximate if exact time is unknown

House System

Equal

Each house spans exactly 30° from your Ascendant. Simple to compare, but every cusp and placement remains provisional when birth time is approximate.

Placidus

Time-based divisions. The most popular system in Western astrology today.

Whole Sign

Each sign = one house. The oldest classical method, used in Hellenistic astrology.

Lunar Node Model

Mean Node Smoothly-moving classical point (default) True Node Osculating node — wobbles ±~1.5° about the mean

Black Moon Lilith (mean lunar apogee, ⚸) and the lunar nodes (☊ / ☋) are always included in your chart.

Instrument specification

A chart you can audit.

Published methodsThe wheel is a schematic drawing of calculated Western tropical positions, not a sky photograph.

Qualified limitsPublished methods typically place the supported major-planet positions within about a sixtieth of a degree across 1800–2200. Accuracy varies by body and date; Pluto and Chiron carry wider, date-dependent limits.

Time honestyNo birth time? Date-based placements remain available; Moon, Rising, the career angle and houses are withheld instead of guessed.

Place lookup disclosedBirth fields have no URL names. Place search contacts Open-Meteo to resolve coordinates; the chart calculation stays in the browser.

Natal wheel

Click a body · the sitting is the next door

Click a planet or aspect line · Esc clears

Chart details & export

Computed locally · VSOP87 + ELP2000 · Western tropical / geocentric Numbers are computed positions; interpretations are editorial. Ecliptic rings and export artwork are schematic, not measured sky photographs. Live feeds are labelled separately. Add a birth time for Moon, Rising, MC and houses — time-sensitive points are withheld without it See where the 12 Aug eclipse landed → The chart page withholds Moon and angles without a birth time. The natal reading keeps the Moon as approximate (±7°) and still withholds angles. Keep is optional and free — this chart stays free either way, and the minute travels in this tab, never in the link.

Your minute, then the sitting

Cast your chart

Core placements and time-dependent angles