Tom Coster birth chart is shown with zodiac signs and aspects. Because the birth time is unknown, Arcadia does not use houses, Rising sign, or angular dominants as the main basis of interpretation.
Tom Coster's chart rests first on the stable factors: Sun in Leo and Moon in Leo. Without a reliable time, signs and aspects are stronger than the Rising sign or houses.
Chart detail:
Sun square Saturn (orb 0.2°) gives a central dynamic in this reading. The orb is extremely tight; this aspect is one of the chart's strongest signals.
In plain terms, this aspect makes identity, ego, and father image meet Saturn pressure: confidence, recognition, or the father relationship may have to grow through duty, delay, judgment, authority, or fear of failure.
The birth time is not known with certainty, so the Rising sign and houses are less reliable. Signs and exact aspects give the safer reading base.
Learn the zodiac signs · Learn the planets · Learn the houses · Browse celebrity charts · Calculate your own birth chart
| Element | Sign | Degrees | Speed |
| Sun | Leo | 28° 01' 13" | 0.963 / day |
| Moon | Leo | 11° 58' 58" | 13.367 / day |
| Mercury | Virgo | 00° 32' 52" | 1.958 / day |
| Venus | Libra | 00° 34' 35" | 1.201 / day |
| Mars | Aries | 21° 53' 27" | 0.218 / day |
| Jupiter | Gemini | 17° 38' 56" | 0.142 / day |
| Saturn | Taurus | 28° 11' 08" | 0.035 / day |
| Uranus | Gemini | 00° 15' 20" | 0.012 / day |
| Neptune | Virgo | 26° 20' 31" | 0.033 / day |
| Pluto | Leo | 04° 36' 37" | 0.026 / day |
| Lilith | Taurus | 18° 27' 06" | 0.111 / day |
| RS | Sagittarius | 01° 31' 55" | |
| MH | Leo | 27° 12' 36" |
Log in or create and account to be able to save your own charts (it's free!).
Signs Sun in Leo · Venus in Libra · Mars in Aries
Aspects Venus conjunct Neptune (orb 4.2°) · Sun trine Mars (orb 6.1°) · Sun square Saturn (orb 0.2°) · Mercury square Saturn (orb 2.4°)
This section gives a concrete reading thread. It highlights the most visible signatures, then the tabs keep each placement separate instead of mixing everything together.
Important: Unknown birth time: the Rising sign, houses, and angular dominants are too time-sensitive to anchor the interpretation. The Moon remains useful, but its exact aspects can shift during the day: tight non-Moon aspects are more reliable when they exist.
Start here: a short reading that shows what hooks, what helps, what pushes back, and where it becomes concrete.
Sun in Leo · Moon in Leo
First hook: this is where the chart often becomes recognizable in real life. Sun in Leo: identity and direction move through presence, pride, creation, and the wish to be seen; Moon in Leo: emotional safety looks for presence, pride, creation, and the wish to be seen. Because the birth time is missing, reliable aspects should carry the next step before houses or angles.
Dominants unavailable without reliable birth time
Angular dominants depend on birth time. Without a reliable hour, do not use them as primary evidence.
Harmonious circuit: Venus, Saturn, Uranus, Neptune, and Pluto
This is the easiest door into the chart: it shows what tends to cooperate naturally.
This pattern describes what comes more easily. Houses are not used here: unknown time. It connects Venus (attraction, pleasure, taste, and relationships), Saturn (responsibility, limits, effort, and patience), Uranus (change, freedom, rupture, and originality), and Neptune (dreams, ideals, imagination, and confusion).
This is the clearest cooperation pattern in the chart: Venus trine Uranus (orb 0.3°), Venus trine Saturn (orb 2.4°), and Saturn trine Neptune (orb 1.8°). It shows where functions support each other, recover, or come naturally when used together. Because several planets are connected, the full pattern matters more than one isolated aspect.
Tension circuit: Sun, Saturn, Uranus, and Mercury
This is the pressure line to read first: it shows where tension repeats in concrete situations.
This pattern shows where pressure builds fastest. Houses are not used here: unknown time. It connects Sun (identity, confidence, and direction), Saturn (responsibility, limits, effort, and patience), Uranus (change, freedom, rupture, and originality), and Mercury (thinking, speech, and decisions).
This is the clearest friction pattern in the chart: Sun square Saturn (orb 0.2°), Mercury square Uranus (orb 0.3°), and Sun square Uranus (orb 2.2°). It shows where pressure, contradiction, or repeated effort concentrates. Because several planets are connected, the full pattern matters more than one isolated aspect.
Houses unavailable without reliable birth time
Houses describe domains of existence, but they depend on birth time. Without a reliable hour, signs and aspects should carry the reading.
Read the full chart-reading method · Detailed placements and aspects are below in the tabs.
Without a reliable birth time, the Sun, Moon, and exact aspects become the reliable base. The Rising sign, houses, and angular dominants need a reliable birth time.
The Moon can change signs during a day. Near a lunar sign change, the Moon sign remains a hypothesis.
Without a reliable hour, exact aspects and reliable repetitions can strongly nuance the starting reading.
Sun in Leo remains a reliable combination even without a birth time. The Sun describes identity, ego, father figure, visibility, and direction, with Leo style: presence, pride, creation, and the wish to be seen.
Concretely, the person expresses identity, ego, father figure, recognition, and personal direction through the Leo style (presence, pride, creation, and the wish to be seen). Exact aspects and repeated patterns indicate whether this theme becomes central.
Aspect connected to this placement: Sun square Saturn (orb 0.2°). Aspect effect: makes identity, ego, and father image meet Saturn pressure: confidence, recognition, or the father relationship may have to grow through duty, delay, judgment, authority, or fear of failure.
Sun square Saturn (orb 0.2°) creates concrete friction between the two planets. The orb is extremely tight; this aspect is one of the chart's strongest signals.
Here, Sun in Leo brings identity, ego, father figure, visibility, and direction with Leo style (presence, pride, creation, and the wish to be seen); Saturn in Taurus brings discipline, constraint, endurance, and mastery with Taurus style (nature, good food, physical sensuality, roots, resources, and perseverance).
Concrete friction: this aspect makes identity, ego, and father image meet Saturn pressure: confidence, recognition, or the father relationship may have to grow through duty, delay, judgment, authority, or fear of failure.
Sun conjunct Mercury (orb 2.5°) brings the two planets out together. The orb is tight enough to count in the main reading.
Here, Sun in Leo brings identity, ego, father figure, visibility, and direction with Leo style (presence, pride, creation, and the wish to be seen); Mercury in Virgo brings intellect, language, thought, and technique with Virgo style (precision, method, usefulness, and attention to detail).
Concrete effect: this aspect brings identity, ego, father image, intellect, and speech together: thought sticks strongly to the self-image.
Reading note: Common solar conjunction: Mercury and Venus always stay close to the Sun. It becomes genuinely meaningful when the orb is very tight, one factor is angular, or the same theme repeats elsewhere.
Sun square Uranus (orb 2.2°) creates concrete friction between the two planets. The orb is tight enough to count in the main reading.
Here, Sun in Leo brings identity, ego, father figure, visibility, and direction with Leo style (presence, pride, creation, and the wish to be seen); Uranus in Gemini brings disruption, independence, and change with Gemini style (curiosity, language, movement, and mental adaptation).
Concrete friction: this aspect creates tension between ego, personal stability, and refusal of the frame.
Moon in Leo remains a useful base without a birth time. The Moon sign is often usable, but near a Moon sign change it remains a hypothesis; the Moon describes personal dream, play, inner child, childhood imprint, mother figure, mother image, optimism, and inner rhythm, with Leo style: presence, pride, creation, and the wish to be seen.
Concretely, the person expresses personal dream, play instinct, inner child, childhood imprint, mother figure, mother image, optimism, and inner rhythm through the Leo style (presence, pride, creation, and the wish to be seen). Exact aspects and repeated patterns indicate whether this theme becomes central.
The Rising sign cannot be determined if the time is not known.
Mercury in Virgo remains a reliable combination even without a birth time. Mercury describes intellect, language, thought, and technique, with Virgo style: precision, method, usefulness, and attention to detail.
Concretely, the person expresses thinking, speech, learning, technique, and mental strategy through the Virgo style (precision, method, usefulness, and attention to detail). Exact aspects and repeated patterns indicate whether this theme becomes central.
Aspect connected to this placement: Mercury square Uranus (orb 0.3°). Aspect effect: creates tension between thought, nervousness, rupture, and contradiction: the mind can cut too fast, provoke, or refuse the frame.
Mercury square Uranus (orb 0.3°) creates concrete friction between the two planets. The orb is extremely tight; this aspect is one of the chart's strongest signals.
Here, Mercury in Virgo brings intellect, language, thought, and technique with Virgo style (precision, method, usefulness, and attention to detail); Uranus in Gemini brings disruption, independence, and change with Gemini style (curiosity, language, movement, and mental adaptation).
Concrete friction: this aspect creates tension between thought, nervousness, rupture, and contradiction: the mind can cut too fast, provoke, or refuse the frame.
Same aspect, other side: the full reading is under the other planet, and it also applies to Mercury.
Mercury square Saturn (orb 2.4°) creates concrete friction between the two planets. The orb is tight enough to count in the main reading.
Here, Mercury in Virgo brings intellect, language, thought, and technique with Virgo style (precision, method, usefulness, and attention to detail); Saturn in Taurus brings discipline, constraint, endurance, and mastery with Taurus style (nature, good food, physical sensuality, roots, resources, and perseverance).
Concrete friction: this aspect creates tension between thought, doubt, rigidity, and the demand for precision.
Venus in Libra remains a reliable combination even without a birth time. Venus describes desire, taste, relationship, and attraction, with Libra style: relationship, balance, negotiation, and sense of form.
Concretely, the person expresses desire, taste, attraction, pleasure, and love style through the Libra style (relationship, balance, negotiation, and sense of form). Exact aspects and repeated patterns indicate whether this theme becomes central.
Aspect connected to this placement: Venus trine Uranus (orb 0.3°). Aspect effect: gives positive ease between charm and originality: attraction can become free, inventive, modern, or unexpected.
Venus trine Uranus (orb 0.3°) shows positive structural ease between the two planets. The orb is extremely tight; this aspect is one of the chart's strongest signals.
Here, Venus in Libra brings desire, taste, relationship, and attraction with Libra style (relationship, balance, negotiation, and sense of form); Uranus in Gemini brings disruption, independence, and change with Gemini style (curiosity, language, movement, and mental adaptation).
Concrete support: this aspect gives positive ease between charm and originality: attraction can become free, inventive, modern, or unexpected.
Venus trine Saturn (orb 2.4°) shows positive structural ease between the two planets. The orb is tight enough to count in the main reading.
Here, Venus in Libra brings desire, taste, relationship, and attraction with Libra style (relationship, balance, negotiation, and sense of form); Saturn in Taurus brings discipline, constraint, endurance, and mastery with Taurus style (nature, good food, physical sensuality, roots, resources, and perseverance).
Concrete support: this aspect gives durable ease between taste, loyalty, sobriety, and commitment.
Venus conjunct Neptune (orb 4.2°) brings the two planets out together. The orb is moderate; it stays secondary beside tighter signatures.
Concrete effect: this aspect mixes Venus with Neptune: desire, beauty, projection, glamour, romantic ideal, and sensitivity to collective moods come out together.
Venus sextile Pluto (orb 4°) shows active cooperation between the two planets. The orb is moderate; it stays secondary beside tighter signatures.
Concrete cooperation: Venus and Pluto can cooperate when desire becomes a force of transformation instead of a simple need to possess.
Mars in Aries remains a reliable combination even without a birth time. Mars describes action, courage, competition, and effort, with Aries style: initiative, speed, confrontation, and direct action.
Concretely, the person expresses action, anger, courage, competition, and effort through the Aries style (initiative, speed, confrontation, and direct action). Exact aspects and repeated patterns indicate whether this theme becomes central.
Mars sextile Jupiter (orb 4.2°) shows active cooperation between the two planets. The orb is moderate; it stays secondary beside tighter signatures.
Concrete cooperation: action and fulfillment can cooperate when the person chooses a concrete goal.
Jupiter in Gemini remains a reliable combination even without a birth time. Jupiter describes personal fulfillment, confidence, encouragement, and broader horizons, with Gemini style: curiosity, language, movement, and mental adaptation.
Concretely, the person expresses personal fulfillment, confidence, and opening of horizons through the Gemini style (curiosity, language, movement, and mental adaptation). Exact aspects and repeated patterns indicate whether this theme becomes central.
Same aspect, other side: the full reading is under the other planet, and it also applies to Jupiter.
Saturn in Taurus remains a reliable combination even without a birth time. Saturn describes discipline, constraint, endurance, and mastery, with Taurus style: nature, good food, physical sensuality, roots, resources, and perseverance.
Concretely, the person expresses discipline, limits, duty, fear, and long construction through the Taurus style (nature, good food, physical sensuality, roots, resources, and perseverance). Exact aspects and repeated patterns indicate whether this theme becomes central.
Same aspect, other side: the full reading is under the other planet, and it also applies to Saturn.
Saturn conjunct Uranus (orb 2.1°) brings the two planets out together. The orb is tight enough to count in the main reading.
Here, Saturn in Taurus brings discipline, constraint, endurance, and mastery with Taurus style (nature, good food, physical sensuality, roots, resources, and perseverance); Uranus in Gemini brings disruption, independence, and change with Gemini style (curiosity, language, movement, and mental adaptation).
Concrete effect: this aspect brings Saturn (discipline, constraint, endurance, and mastery) together with Uranus (disruption, independence, and change) in the same behaviors or situations.
Saturn trine Neptune (orb 1.8°) shows positive structural ease between the two planets. The orb is very tight; this describes a stable character pattern more than a passing reaction.
Here, Saturn in Taurus brings discipline, constraint, endurance, and mastery with Taurus style (nature, good food, physical sensuality, roots, resources, and perseverance); Neptune in Virgo brings imagination, image, popularity, collective moods, and inspiration with Virgo style (precision, method, usefulness, and attention to detail).
Concrete support: this aspect gives positive ease giving solid form to a dream or collective image.
Same aspect, other side: the full reading is under the other planet, and it also applies to Saturn.
Same aspect, other side: the full reading is under the other planet, and it also applies to Saturn.
Uranus in Gemini remains a reliable combination even without a birth time. Uranus describes disruption, independence, and change, with Gemini style: curiosity, language, movement, and mental adaptation.
Concretely, the person expresses freedom, disruption, broken rhythms, and the need for independence through the Gemini style (curiosity, language, movement, and mental adaptation). Exact aspects and repeated patterns indicate whether this theme becomes central.
Same aspect, other side: the full reading is under the other planet, and it also applies to Uranus.
Same aspect, other side: the full reading is under the other planet, and it also applies to Uranus.
Same aspect, other side: the full reading is under the other planet, and it also applies to Uranus.
Same aspect, other side: the full reading is under the other planet, and it also applies to Uranus.
Neptune in Virgo remains a reliable combination even without a birth time. Neptune describes imagination, image, popularity, collective moods, and inspiration, with Virgo style: precision, method, usefulness, and attention to detail.
Concretely, the person expresses imagination, image, popularity, and the ability to read collective currents through the Virgo style (precision, method, usefulness, and attention to detail). Exact aspects and repeated patterns indicate whether this theme becomes central.
Same aspect, other side: the full reading is under the other planet, and it also applies to Neptune.
Same aspect, other side: the full reading is under the other planet, and it also applies to Neptune.
Pluto in Leo remains a reliable combination even without a birth time. Pluto describes crisis, power, survival, and regeneration, with Leo style: presence, pride, creation, and the wish to be seen.
Concretely, the person expresses crisis, power, sexuality, survival, and transformation through the Leo style (presence, pride, creation, and the wish to be seen). Exact aspects and repeated patterns indicate whether this theme becomes central.
Same aspect, other side: the full reading is under the other planet, and it also applies to Pluto.
Lilith in Taurus remains a reliable combination even without a birth time. Lilith describes pure ideal, absolute demand, fascination, and refusal of compromise, with Taurus style: nature, good food, physical sensuality, roots, resources, and perseverance.
Concretely, the person expresses the pure ideal, absolute demand, desire, fascination, and what refuses to become ordinary through the Taurus style (nature, good food, physical sensuality, roots, resources, and perseverance). Exact aspects and repeated patterns indicate whether this theme becomes central.
