Natal Compass

Birth chart

Computes a birth chart from a date, an optional time and a place: the sign and degree of the Sun, Moon, planets, lunar nodes, Lilith, Chiron and the Part of Fortune, the ascendant and midheaven, the twelve house cusps and the major aspects between planets. Use it when a person asks about their chart, their placements, their rising sign, their houses or their aspects. The birth place must be given as latitude and longitude in decimal degrees; when a person names a place, look up its coordinates f

Planets on a date

Gives where the Sun, Moon and planets are on a date: the sign and degree of each, computed geocentrically for 00:00 UTC on that date, or for the current instant when no date is given. Use it, rather than web search, when a person asks where a planet is now, what the sky looks like on a date, or which sign the Moon is in today. Positions only: it does not say whether a planet is retrograde, and it is tied to no birth chart. For how a date relates to a birth chart, use get_transits_to_chart; for t

Transits to a birth chart

Relates the sky on a date to a specific birth chart: which transiting planets form major aspects to which natal points, with orbs, plus the transiting positions themselves. Aspects are to the natal planets and points (the lunar nodes, Lilith, Chiron and the Part of Fortune); aspects to the ascendant and midheaven are not included. Use it when a person asks how the planets on a given day, or today, relate to their chart, what a transiting planet is doing to one of their natal placements, or which

Moon phase

Gives the Moon on a date: the phase name, how much of the Moon is lit, its elongation from the Sun, the sign and degree of the Moon and of the Sun, and whether the Moon is void of course, with the time of its next major aspect and of its next sign change. Values are for 00:00 UTC on the date, or for the current instant when no date is given. Use it, rather than web search, when a person asks whether the Moon is void of course right now, about the Moon phase, a full or new Moon, the sign the Moon

Retrograde periods of a year

Lists the retrograde periods of Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto in a calendar year: the day each planet stations retrograde and the day it stations direct, to the day, in UTC. Use it when a person asks whether a planet is retrograde on a date, when a Mercury retrograde starts or ends, or which planets are retrograde in a year. The year is optional and defaults to the current year. A period that crosses the year boundary is shown in full. For where the planets are

Synastry between two charts

Compares two birth charts: the major aspects between one person's Sun, Moon, planets and North Node and the other's, each with its orb. Use it when a person asks how two charts relate, which aspects run between two people's charts, or what one person's planet does to another's. It needs the birth details that get_natal_chart takes for each person, as person_a and person_b, with each birth place as latitude and longitude in decimal degrees; when a person names a place, look up its coordinates fir

Solar return chart

Computes a solar return chart: the moment in a given year when the Sun returns to its natal position, and the chart cast for that moment at a place, with the planets, the ascendant and midheaven, the twelve house cusps and the major aspects. Use it when a person asks about their solar return or their birthday chart for a year. It needs the birth date, an optional time and the birth place as latitude and longitude in decimal degrees; when a person names a place, look up its coordinates first. The