Asteroid Astrology Calculator
The ten planets describe the broad outline of a chart. The asteroids fill in what that outline leaves out. Ceres, Pallas, Juno and Vesta were the first four discovered, between 1801 and 1807, and astrologers gradually recognised that they described areas of experience the traditional planets had no separate symbol for: how a person nurtures and grieves, how they think strategically, what they require from a partnership, and what they are willing to give everything to.
This Asteroid Report calculates thirty-five asteroids in your birth chart, gives the sign and house of each, and identifies which of them sit close enough to a personal planet or an angle to actually matter in your chart. Twenty-four of them, the best established, are read by default, and the rest are calculated on request.
Where the Natal Chart Report covers your planets and their aspects, the Asteroid Report adds the finer detail underneath, and it will often name something the planetary chart only gestured at.
How to Generate Your Asteroid Chart
Date of Birth: Your birth date sets the position of every asteroid in the zodiac, which is what determines each sign placement.
Birth Time: An accurate birth time gives you the house placements and the contacts to your Ascendant and Midheaven. Without one the report still runs and still gives you every sign placement, but houses and angle contacts are left out because they cannot be calculated honestly.
Birthplace: Enter your birth city and choose the correct location from the list. The coordinates are needed for the house cusps and the angles.
Which Asteroids Are Included
Thirty five bodies, grouped below by the kind of material they describe. Each one is placed by sign and house in your chart and tested for contacts with your planets and angles, and each contact comes with its own written reading.
The four goddesses
- Ceres is nurture and its interruptions: how you feed and are fed, what you hold on to, and how you handle separation and return.
- Pallas is pattern recognition: strategy, craft, the kind of intelligence that sees the shape of a problem before the detail.
- Juno is committed partnership: what you require of a long bond, what you will tolerate in one, and where loyalty becomes a sore point.
- Vesta is focused devotion: what you give yourself to completely, and what you keep private in order to protect it.
Wound and shadow
- Chiron is the injury you cannot heal in yourself and become unusually good at treating in other people.
- Black Moon Lilith is refusal: the part of you that will not be managed, and what it costs to show it.
- Eris is the disruption caused by being left out, and the reckoning that follows when the excluded party arrives anyway.
- Pholus is the small action with disproportionate consequences, the lid coming off something that had been sealed for a generation.
- Pandora is curiosity that sets things in motion before anyone has decided whether they should be.
Love and union
- Eros is desire and what specifically ignites it for you.
- Psyche is soul recognition, and the trials a bond goes through before it is understood.
- Amor is affection given without conditions attached.
- Valentine is devotion expressed, the romantic gesture and the long fidelity behind it.
- Sappho is intimacy inside friendship, and love that does not fit the expected shape.
- Union is the point of joining itself, where two separate lives become one arrangement.
- Groom, Briede and Boda are the roles and the ceremony: who you become when you marry, and the wedding as an event in its own right.
Work and talent
- Industria is sustained effort, the capacity to keep going after the interest has worn off.
- Academia is formal learning and your relationship to institutions that certify it.
- Nike is victory, and what winning does to you.
- Talent is natural aptitude, the thing that came easily and may therefore have been undervalued.
- Vulcano is the forge: raw force disciplined into something made.
- Urania is the pull toward the sky, mathematics and systems, and astrology itself.
Fate and memory
- Karma is consequence arriving, usually later than expected.
- Destinn is the sense of appointed direction, the road that seems chosen for you.
- Proserpina is descent and return, the cycle of being taken under and coming back changed.
- Mnemosyne is remembrance: what you cannot put down, and what you are the keeper of.
- Hekate is the threshold and the crossroads, the moment of choosing in the dark.
- Orpheus is grief given a voice, and the art that comes out of loss.
Drive, health and the far horizon
- Diana is independence and the wish to be left unclaimed.
- Icarus is risk taken for its own sake, and the particular way you overreach.
- Toro is raw strength and stubbornness, force that does not ask permission.
- Hidalgo is standing up for others, the self-appointed champion of a cause.
- Hygiea is health, prevention and the ordinary maintenance of a body.
If you want short definitions of these and the other points in a chart, our points and asteroids glossary covers the terminology. This page produces the reading for your own chart.
The Marriage and Relationship Asteroids
These are the asteroids people look up most often, usually with a specific question about partnership behind the search. Each one is placed in your chart by sign, degree and house, with a written reading of what that placement describes. Juno is calculated by default. Groom, Briede, Boda, Union and Valentine sit in the extended set, so open your report and use Show all asteroids to bring them in.
Juno
Asteroid 3, and the one with the most written about it. Juno was the wife of Jupiter in Roman myth, and in a chart she describes what you actually need from a committed bond, which is a separate question from what attracts you in the first place. Her sign and house often describe the kind of partner you keep returning to, the terms on which you can stay, and where betrayal or imbalance would hurt most. Juno is part of the default set of twenty-four.
Groom
Asteroid 5129. Used in modern practice as a marriage significator, read alongside Briede and Boda when the question is about a wedding or a husband figure. Its placement describes the partner role, so it is read most usefully by house and by its contacts to the Sun, Moon, Venus and the angles. There is little published literature on this body, so the report says what it is and how it is used, and leaves the weight of it to you.
Briede
Asteroid 19029, the counterpart to Groom, named for the bride. Read the same way and usually together with it, describing the bridal or wife role in a chart. It carries no fixed prediction about marrying. As with Groom, the tradition here is recent and thin, and the report is explicit about that.
Boda
Asteroid 1487. Boda is the Spanish word for wedding, and this body is read as the event itself, with Groom and Briede covering the two people in it. Astrologers who work with the marriage asteroids tend to look at Boda in contact with Juno, Groom or Briede, or sitting on an angle, when timing questions come up.
Union
Asteroid 1585. Read as coming together and staying together, in partnerships and in working alliances. It sits comfortably beside Juno, where Juno describes the terms of a bond and Union describes the fact of it.
Valentine
Asteroid 447. Devotion of the openly romantic kind, the gesture made and the affection declared. It reads well with Eros and Amor, which cover desire and tenderness respectively.
Eros, Psyche, Sappho and Amor
The four love asteroids with the deepest interpretive tradition behind them, and all four are in the default set. Eros is desire and what charges it, Psyche is the soul recognition that outlasts attraction, Sappho covers friendship that carries feeling and creative intimacy, and Amor is tenderness and unconditional regard. Each is placed by sign and house with its own reading.
What You Will Find in Your Asteroid Report
Every Placement, by Sign and House
Each asteroid is given its sign, its exact degree, and its house when a birth time is available, along with a written interpretation of both. Each section also explains what the asteroid actually governs before you read your own placement, so an unfamiliar name such as Mnemosyne or Hekate is not left as a word on a table.
Contacts to Your Chart
Every asteroid is measured against your Sun, Moon, Mercury, Venus, Mars and the angles, and the contacts are listed tightest first so the ones that actually shape the chart lead. Conjunctions are taken to 5°. For the six asteroids with the deepest tradition behind them, Ceres, Pallas, Juno, Vesta, Chiron and Black Moon Lilith, the flowing and difficult angles are read as well, to 3°. A sextile or a trine describes something already available to you, easy enough to use that it often goes unexamined. A square or an opposition describes friction you have to work at, and that work usually produces the sturdier version of the same capacity. Each contact is graded from exact through to loose, so you can see at a glance which ones carry real weight.
The outer planets are left out deliberately: an asteroid sitting on Neptune or Pluto is shared by everyone born within a few years of you, so it describes a generation and not a person.
Asteroids in Contact With Each Other
Where two asteroids meet closely in your chart, for instance Ceres with Juno or Pallas with Vesta, the report names the combination and explains what the pairing produces.
The Chart Wheel
A wheel showing your planets, the angles and the aspect grid, with the contacting asteroids marked on it. Only the asteroids that actually form a contact are drawn, since thirty-five glyphs at once would be unreadable and the ones touching nothing have nothing to say about the shape of the chart.
What to Expect from Your Asteroid Reading
You will find:
- Thirty-five asteroids placed by sign, degree and house
- A written interpretation for every placement, not a table of positions
- A plain explanation of what each asteroid governs
- Every contact to your chart, ranked by orb and graded by strength
- Conjunctions for all of them, plus flowing and difficult angles for the core six
- Contacts between asteroids where they occur
- A chart wheel and aspect grid
Read alongside your Natal Chart Report, the asteroids tend to explain the specifics a planetary chart leaves general.
