Last updated May 26, 2026

Free Pholus Asteroid Calculator

Enter your birth details to find asteroid 5145 Pholus: the part of the chart where a small action sets off a chain reaction, read by sign and house in a practitioner's voice.

What Pholus is, and what this calculator returns

Asteroid 5145 Pholus is a centaur, discovered on January 9, 1992 by David L. Rabinowitz at Kitt Peak National Observatory through the Spacewatch survey. Her orbit crosses the gap between Saturn and Neptune, with a perihelion near 8.6 AU and an aphelion near 32 AU, and the full cycle takes about 92 years. Because the orbit is highly eccentric, Pholus does not spend equal time in each sign: in a modern lifetime she may transit a single sign for as little as five years or as long as twelve, which makes her sign a generational marker first and a personal one second.

Pholus is one of the four supported centaurs alongside Chiron, Nessus, and Chariklo. The Centaur Calculator linked below reads all four together; the all-asteroids calculator covers Pholus alongside the wider minor-body set.

The calculator above returns your Pholus sign, degree, house, and any tight major natal aspects to the main chart factors that the engine finds within its conservative orb. Positions come from JPL ephemeris data, the same source the rest of the Augurine engine reads. The sign and house entries below give you a written interpretation block by block; the calculator points you to the one that matches your placement.

The stance this page takes

Most writing about Pholus online cycles between two frames. One: she is the trauma-trigger asteroid, the chart factor that warns of explosive events about to unfold. Two: she is the cosmic-butterfly asteroid, a generalized metaphor for any small action with a big consequence. The first frame predicts; the second flattens. Neither leaves a person anything to do with the placement except wait or shrug.

We read Pholus as the uncorking asteroid. The pattern she names is the small action that opens a sealed container: a sentence said, a cork pulled, a question asked, a clause signed. What was already in the bottle does the rest of the work. Her placement marks where you tend to pull these corks and where they tend to land hardest when pulled, which makes the work practical rather than fatalistic. You can learn what your jars look like before the action that opens them.

Pholus vs. Chiron: the difference that matters

Pholus and Chiron are both centaurs and both entered the modern record the same way, but they are not interchangeable in a chart reading. Chiron names the chronic wound, the structural injury that organizes a life around it: the thing you carry, the thing the work returns to. Pholus names the single moment that uncorks the wound or opens the seal, the small action whose consequences then run on their own. Chiron is the condition; Pholus is the event.

In practice the contrast looks like this. Two people share a Chiron in the 4th house, an early-family wound. The first person's Pholus sits in Gemini squaring the Sun. The second person's Pholus sits in Capricorn trining Saturn. The wound is the same. The trigger pattern is not. The first uncorks her Chiron through an offhand sentence said to a sibling at thirty-one. The second uncorks his through a structural decision about an aging parent at fifty-two. The Chiron reading tells you the bottle. The Pholus reading tells you the cork.

When a chart has tight Pholus and Chiron contacts inside three degrees, read the two together: the event-trigger has gone looking for the chronic wound, or the chronic wound has built itself into the event-trigger. Either way the two bodies are working as one mechanism rather than as parallel themes.

How to read your Pholus placement

Sign is generational, not personal. Pholus takes about 92 years to circle the zodiac, with an eccentric orbit that lets her sit in some signs for five or six years and others for ten or twelve. Your Pholus sign is shared with a cohort of birthdays around your own, and the sign tells you the texture of the small-cause-large-effect mechanic for that cohort: how a generation tends to uncork, what kind of seal it tends to break.

House is personal. With an exact birth time, Pholus also lands in a specific house, the life area where your version of the cohort's pattern actually plays. A Pholus in Sagittarius in the 3rd house places the curiosity-trigger inside language and the close circle. A Pholus in Sagittarius in the 10th places the same curiosity-trigger inside the public record of career. Same generational pattern, very different venue.

Aspects are activation. Tight contacts to natal personal planets and angles tell you what other part of the chart shows up at the moment of the uncorking. Pholus on the Moon means the cork is pulled through mood and gut. Pholus square Mars means the cork is pulled in a heated moment. Pholus conjunct Saturn means the cork is pulled inside a structural decision. Aspects tell you the agent, not the meaning.

Orb discipline matters more on Pholus than on the lights. The community standard for centaurs is 2° natal and 1° transit. This result keeps the first pass to tight major aspects. If you read beyond what the calculator returns, 2° is the outer ceiling; past that you are reading the surrounding chart rather than Pholus.

Key aspects to Pholus

Pholus to the Sun (conjunction, opposition, square): the chain-reaction mechanic is built into core identity. People read you as someone whose small actions tend to set off larger ones, and your bearing carries an open cork before you have language for it. The shadow is identity-by-trigger, the version of you that only feels real when something has just been set off.

Pholus to the Moon: the uncorking arrives through mood and gut first. You feel a small action coming before the conscious mind has named it. The Moon's sign and house tell you what the early signal feels like; that is your earliest interruption point in the sequence.

Pholus to Mars: the cork is pulled in heated language or motion. Mars's sign tells you the texture of the trigger and the contact tells you the temperature. A Pholus and Mars contact inside 2° is worth tracking specifically for the rehearsal moment, the half-second between the temperature rising and the move.

Pholus to Saturn: the highest-stakes aspect on this asteroid. Saturn gives Pholus weight, time, and consequence, and the uncorking becomes structural, with effects that span years. A Pholus and Saturn aspect inside 3° usually reads as the chart's defining cork-pull moment: the small decision that reorganizes the structure under a life. Worth reading first in any chart that has one.

Pholus to Chiron: the event-trigger has found the chronic wound. Read the two as one mechanism, not as parallel placements. The order matters: which body holds the wound and which body opens it is part of the reading.

Pholus to the lunar nodes: each cork-pull carries the weight of the larger arc, not just the local question. South-node contacts pull from inherited material; north-node contacts pull toward the next development.

Pholus to Pluto: the deep-uncorking combination. Pholus pulls the surface cork; Pluto holds the depth that comes out. Together the two produce the rare uncorkings that visibly change the floor of a life.

When 5145 is the wrong tool

A fraction of people searching for a Pholus asteroid calculator are actually asking a different question. If any of the following is closer to what you want, the page you need is not this one.

Chronic wounds and the structural injury a life is organized around: that is Chiron, asteroid 2060. Pholus describes the moment a wound is uncorked; Chiron describes the wound itself. If your question is what is wrong, read Chiron first.

A cyclical pattern of harm being interrupted, particularly inside a relationship or a family line: that is Nessus, the centaur 7066. Nessus is the loop; Pholus is the single trigger that opened the loop. The two are often confused because both centaurs handle difficult material, but they answer different questions.

Sudden disruption from outside the system: that is the Uranus reading, not Pholus. Uranus shows up as an unanticipated shock from the environment; Pholus shows up as a small action with disproportionate internal consequence. The first reading is about the external event; the second is about the mechanism that opened to it.

Slow-burn transformation that restructures a life through pressure rather than through trigger: that is Pluto. A Pluto transit organizes years around its theme; a Pholus transit organizes a moment around its cork. Both can show up in a year of upheaval, but the reading differs.

Pholus in synastry and transit

In synastry, Pholus contacts can be read as questions about which person tends to be the source of the small actions whose consequences then organize the relationship. When one person's Pholus sits on another person's Sun, Moon, or angles, the cork-pulling lands in that area of the partner's chart, often as a sequence of small moments that compound rather than as a single dramatic event. Read it as a dynamic available to both people, not as a power assignment.

Pholus transits run on a 92-year orbit, with average daily motion near 0.01° but highly variable across the cycle. A direct pass through a 1° hot zone takes three to four months at typical speeds, and considerably longer near aphelion. Once retrograde motion is included, the full triple-contact period for a transiting Pholus over a natal point can span eighteen to twenty-four months across all three exact contacts. The strongest transit signature in a chart is Pholus aspecting natal Pholus, which is rare in a lifetime because of the long orbit and marks the activation moment of your trigger-work. Use the windows to notice the rehearsal in real time. The transit is not a prediction; it is a reading of which corks are currently in the room.

Pholus through the 12 zodiac signs

A short interpretation of Pholus in each zodiac sign. Read the entry that matches your placement above. The other entries give you the texture and shape of the archetype across the full wheel.

Pholus in Aries

the unstopped move

Pholus in Aries names a chain reaction triggered by an unstopped move: the door pushed before the read finishes, the message sent before the second thought arrives. The placement runs hot and arrives early. It works when the moment was actually waiting for someone to act, and fails when the cork was holding something heavier than expected. The half-second pause between impulse and move, held long enough to feel whether the bottle is full of water or full of pressure, is the discipline. The shadow is impact without aftermath: uncorking, walking off, treating consequences as someone else's housekeeping.

Pholus in Taurus

the disturbed ground

Pholus in Taurus names a chain reaction triggered through the ground itself: the body, the table, the room arranged so carefully for years that one small disturbance reveals what the arrangement was actually holding down. It works when the disturbance is welcome and the foundation needed to shift, and fails when the slow-built stability was the thing that kept a harder pattern out of view. Let the disturbance finish before you patch the floor, and listen for what the room is saying after the spill. The shadow is restoration without acknowledgement: the cork pushed back in, the spill never named.

Pholus in Gemini

the careless sentence

Pholus in Gemini names a chain reaction triggered by an offhand sentence: the joke that turned into the rumor, the casual mention that became someone's pivot. The placement notices the small cause and is slow to feel its weight: useful for a journalist or a witness, harder for the speaker who is also a participant. Reread the sentence before sending and ask what bottle this opens for the receiver. The shadow is plausible deniability: treating the spoken cork as something you happened to be standing near rather than something you actually pulled out of the bottle.

Pholus in Cancer

the household jar

Pholus in Cancer names a chain reaction triggered inside the household. A family detail surfaces, an ancestral story leaks, a Sunday dinner becomes the moment three generations realize what was being held in place. It works when the seal needed to come out and the family was strong enough to receive the spill, and fails when the rupture lands on the person least equipped to absorb it. Choose the timing of the uncorking rather than letting the moment make the decision. The shadow is family as detonation: the placement read as permission to keep pulling corks at the same table.

Pholus in Leo

the witnessed pour

Pholus in Leo names a chain reaction triggered in front of an audience: the public moment that flips a fortune, the stage on which a small private gesture lands as something visible and irreversible. It works when the witnessing helps the truth land, and fails when visibility makes the spill more important than what spilled. Locate the smallest possible audience that lets the moment be real, and refuse the version where the audience is the point. The shadow is performance-as-trigger: uncorkings staged for the watching rather than for the contents of the bottle they were drawn from.

Pholus in Virgo

the small adjustment

Pholus in Virgo names a chain reaction triggered by a small procedural move: the email rewritten, the form filed differently, the inventory completed in a way that revealed what the system was hiding. The placement is excellent at noticing the cork before it pulls, which works for an auditor and for anyone whose job is naming what is wrong. It fails when the noticing substitutes for the move and the small correction goes uncoupled from its actual consequences. The shadow is the small-correction that was secretly a large one, named as a fix while the larger spill goes unattended.

Pholus in Libra

the courteous trigger

Pholus in Libra names a chain reaction triggered by a courteous gesture: the polite agreement that turned out to be a binding promise, the consultation that became the partner's permission to leave. It works when the courtesy is real and the gesture matches the weight of what was said, and fails when polite language was carrying a decision you weren't ready to own. Name the size of the offer before you extend it, and refuse the version where a small accommodation is dressed as a generous one. The shadow is harm-as-civility: the trigger pulled inside a frame of fairness.

Pholus in Scorpio

the buried jar

Pholus in Scorpio names a chain reaction triggered in the buried jar: the secret released, the dossier opened, the moment a long-held confidence becomes air the room is now breathing. The placement is the most direct expression of the underlying mythology. It works when the bottle was past time to come out and the room could handle what came up, and fails when the release is performed as honesty when the actual work was revenge. Ask whose interest the disclosure serves before the words leave your mouth. The shadow is uncorking-as-control: depth used as leverage rather than as truth.

Pholus in Sagittarius

the curious pour

Pholus in Sagittarius names a chain reaction triggered by curiosity: the question that should not have been asked at this dinner, the trip that opened a door you now have to walk through. The mythology lives cleanly in this sign. It works when you stay for the answer, which serves a researcher and anyone willing to follow the question all the way home. Check before asking whether you are ready for the conversation the question opens. The shadow is curiosity without residence: corks pulled in places you have no intention of cleaning up afterward.

Pholus in Capricorn

the structural uncorking

Pholus in Capricorn names a chain reaction triggered inside a structure: a policy small enough to overlook, a contract clause edited at the last minute, an institutional seal that turned out to be the only thing keeping the building from rearranging itself. The placement is good at the executive-level uncorking, where one decision reorders a hierarchy, and is mostly useful for lawyers, founders, eldest siblings, anyone who manages the weight of a system. Read the second-order effects out loud before signing the first-order action. The shadow is treating the structure as too large to be moved by a small change, then watching it move.

Pholus in Aquarius

the collective ripple

Pholus in Aquarius names a chain reaction triggered into the collective: the protest sign held by one person that turned into the policy, the data point posted in a friend's group chat that became the network's argument. It works when the originator is willing to be cited for the small cause they pulled, and fails when the cause becomes anonymous the moment the effect gets large. Stay attached to the cork after the bottle has emptied, and refuse the cleaner version of the story that erases the originator. The shadow is movement without author: ripples disowned the moment they get embarrassing.

Pholus in Pisces

the dissolving seal

Pholus in Pisces names a chain reaction triggered through dissolving seals: the boundary that softened in a conversation and then would not re-form, the dream voiced once that started behaving as though it had been promised. It works when the dreamer also keeps the receipt, and fails when the small unsealed moment is forgotten by the person who unsealed it and remembered by the people now living with what came out. Write down the small thing that was said and own the moment of the soft cork being pulled. The shadow is uncorking without memory: the spill remembered only by the room.

Pholus through the 12 houses

If you have an exact birth time, your Pholus also lands in a specific house, the life area where this prompt may be easiest to notice. Without a birth time, use the sign placement as the steadier read and skip this section.

Pholus in the 1st house

Pholus in the 1st places the chain reaction inside the visible self. The way you walk into a room, the first sentence you say, the small unstopped gesture that turned out to set everything else in motion. The placement runs early and people read it as decisive. It works when the move was actually overdue. The shadow is the unstopped move that becomes a signature: a self people learn to brace for, the first sentence consistently uncorking something the speaker had not yet realized they were planning to release.

Pholus in the 2nd house

Pholus in the 2nd places the chain reaction inside resources and personal values. The small purchase that turned out to reorganize the budget, the financial decision made offhand that compounded, the value quietly held that turned out to determine the rest of your economic life. It works when you take the decision seriously at the moment it is made. The shadow is the small expenditure or commitment whose consequences arrive years later, with the placement surprised every time by the size of what the small choice opened.

Pholus in the 3rd house

Pholus in the 3rd places the chain reaction inside speech and the local circuit. The text sent in a heated moment, the published comment that turned into the controversy, the casual remark to the sibling that became the family's organizing wound. It works for someone trained to catch the sentence before sending. The shadow is the speech reflex faster than the second thought: a habit of pulling corks before the body has caught up with what is being released, with the placement surprised by the room every time.

Pholus in the 4th house

Pholus in the 4th places the chain reaction inside the household. A family detail surfaces, an ancestral story leaks, a Sunday dinner becomes the moment three generations realize what was being held in place. It works when the seal needed to come out and the family could receive the spill. The shadow is family as recurring detonation: the placement read as permission to keep pulling corks at the same table, the household never quite stabilizing because the next uncorking is always close.

Pholus in the 5th house

Pholus in the 5th places the chain reaction inside creativity, romance, and the raising of children. The artwork that turned out to set the field in motion, the romantic gesture that became the relationship's whole structure, the small parental choice that organized the rest of the child's life. It works when you take the small creative or relational move seriously at the moment it is made. The shadow is the small move pulled offhand, with the placement surprised when the artwork, the romance, or the child arranges itself around what was released.

Pholus in the 6th house

Pholus in the 6th places the chain reaction inside daily work and the body. The small procedural change that turned out to reorganize the entire workflow, the offhand health choice that compounded across years, the daily routine adjusted slightly and then carrying the rest of the body's life into a different shape. It works when you read the small adjustment carefully. The shadow is the small move treated as nothing, with the body or the workplace surprising the placement decades later with the size of what compounded from the unattended decision.

Pholus in the 7th house

Pholus in the 7th places the chain reaction inside partnership. The polite agreement that turned out to be a binding promise, the consultation that became the partner's permission to leave, the small accommodation that rearranged the entire shape of the relationship. It works when the courtesy is real and the gesture matches the weight of what was said. The shadow is harm-as-civility: a trigger pulled inside a frame of fairness, the placement convinced it was being reasonable while the consequences were being silently signed for by the other party.

Pholus in the 8th house

Pholus in the 8th places the chain reaction inside the buried jar. The secret released, the dossier opened, the inheritance disclosure that rearranged the family, the moment a long-held confidence becomes air the room is now breathing. It works when the bottle was past time to come out and the people could handle what came up. The shadow is uncorking-as-control: depth used as leverage rather than as truth, the disclosure timed not for the room's metabolizing capacity but for the speaker's strategic position.

Pholus in the 9th house

Pholus in the 9th places the chain reaction inside curiosity, teaching, and travel. The question that should not have been asked at this dinner, the trip that opened a door you now have to walk through, the inquiry that turned into a tradition. It works when you stay for the answer, useful for a researcher and anyone willing to follow the question all the way home. The shadow is curiosity without residence: corks pulled in places you have no intention of cleaning up afterward, the question asked and then left for someone else.

Pholus in the 10th house

Pholus in the 10th places the chain reaction inside the public role. The decision made in office that turned out to reorder the field, the policy small enough to overlook that rearranged the institution, the small public gesture that became the moment your career pivoted. It works when you read the second-order effects out loud before signing the first-order action. The shadow is treating the institution as too large to be moved by a small change, then watching it move while the placement is still convinced the decision was minor.

Pholus in the 11th house

Pholus in the 11th places the chain reaction inside the collective. The protest sign held by one person that became the policy, the data point posted in a group chat that became the network's argument, the small contribution to the community that organized the rest of its history. It works when you stay attached to the cork after the bottle empties. The shadow is movement without author: ripples disowned the moment they get embarrassing, the placement happy to claim the cause when the effect is admirable and absent when the consequences are inconvenient.

Pholus in the 12th house

Pholus in the 12th places the chain reaction inside dissolving seals. The boundary that softened in a conversation and then would not re-form, the dream voiced once that started behaving as though it had been promised, the prayer that turned out to set something in motion years later. It works when the dreamer also keeps the receipt. The shadow is uncorking without memory: the spill remembered only by the room, the placement surprised by consequences from soft moments it had not registered as moments at all.

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Frequently Asked Questions

What is asteroid Pholus (5145) in astrology?

Asteroid 5145 Pholus is a centaur, discovered on January 9, 1992 by David L. Rabinowitz at Kitt Peak National Observatory through the Spacewatch project. She is named for the wise centaur in Greek mythology whose accidental uncorking of a communal wine jar triggered a chain of events that ended his own life. In modern astrology Pholus can be read as the part of the chart that handles small actions with disproportionate consequence: the cork pulled, the sentence said, the clause signed whose effects then run on their own.

How do I find my Pholus asteroid sign?

Enter your birth date, time, and place above. The calculator computes asteroid 5145 Pholus at your birth moment from a local JPL SBDB-derived Keplerian element set and returns the sign, degree, and house when birth time and location are known. Pholus takes about 92 years to complete one orbit on a highly eccentric path, so her sign shifts unevenly across a lifetime: as little as five years in one sign or as long as twelve in another.

What is the difference between Pholus and Chiron?

Chiron and Pholus are both centaurs, but they answer different questions. Chiron is the chronic wound, the structural injury that organizes a life around itself. Pholus is the single moment that uncorks the wound, the small action whose consequences then run on their own. In a chart reading, Chiron tells you what is wrong; Pholus tells you what tends to open it. When the two form a tight aspect (within three degrees), read them as one mechanism: the trigger has found the wound, or the wound has built itself into the trigger.

How long is the Pholus orbital cycle and what does a Pholus transit look like?

Pholus completes one orbit in about 92 years on a highly eccentric path between Saturn and Neptune. Her daily motion averages near 0.01° but varies significantly across the cycle. A direct pass through a 1° hot zone takes about three to four months at typical speeds. Once retrograde motion is included, the full triple-contact period for a transiting Pholus over a natal point can span eighteen to twenty-four months, which means a Pholus transit is a season in your life rather than a single date.

What orb should I use for Pholus aspects?

Keep it tight. Two degrees or less for natal aspects, one degree for transits. Centaur orbs are not the same as the personal-planet orbs you may be used to: a named asteroid loses signal fast past 2°, and the looser conventions you see online tend to manufacture meaning rather than find it. This result keeps the first pass conservative by surfacing only tight major aspects returned by the chart engine.

What if I don't know my exact birth time?

You will still see the Pholus sign, which on Pholus is the generational layer rather than the personal one. The house placement requires the hour of birth, so it is skipped without it. The sign tells you the texture of the cork-pulling for your cohort; the house adds the life area where your version actually plays. Without a birth time, lean on aspects to your natal Sun and Moon, both of which you may already know from approximate time of day, as the next-best personal layer.

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