James M. Poterba 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.
James M. Poterba's chart rests first on the stable factors: Sun in Cancer and Moon in Gemini. Without a reliable time, signs and aspects are stronger than the Rising sign or houses.
Chart detail:
Venus opposite Saturn (orb 0.8°) 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 opposes the desire for connection to reserve, fear of lack, or high standards.
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 | Cancer | 20° 34' 50" | 0.954 / day |
| Moon | Gemini | 10° 31' 48" | 12.629 / day |
| Mercury | Leo | 13° 55' 14" | 1.488 / day |
| Venus | Gemini | 19° 34' 29" | 1.191 / day |
| Mars | Aries | 24° 58' 40" | 0.654 / day |
| Jupiter | Libra | 22° 37' 44" | 0.07 / day |
| Saturn | Sagittarius | 20° 23' 46" R | -0.058 / day |
| Uranus | Leo | 10° 36' 52" | 0.059 / day |
| Neptune | Scorpio | 02° 00' 22" R | 0.0 / day |
| Pluto | Virgo | 00° 41' 01" | 0.026 / day |
| Lilith | Aries | 15° 58' 08" | 0.11 / day |
| RS | Libra | 22° 33' 28" | |
| MH | Cancer | 19° 16' 20" |
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Signs Mars in Aries
Aspects Mars trine Pluto (orb 5.7°) · Venus opposite Saturn (orb 0.8°) · Sun square Mars (orb 4.4°)
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 Cancer · Moon in Gemini
First hook: this is where the chart often becomes recognizable in real life. Sun in Cancer: identity and direction move through memory, protection, belonging, and family sensitivity; Moon in Gemini: emotional safety looks for curiosity, language, movement, and mental adaptation. 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: Jupiter, Saturn, Mars, Venus, 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 Jupiter (growth, faith, luck, and confidence in the future), Saturn (responsibility, limits, effort, and patience), Mars (action, anger, desire, and courage), and Venus (attraction, pleasure, taste, and relationships).
This is the clearest cooperation pattern in the chart: Venus trine Jupiter (orb 3°), Jupiter sextile Saturn (orb 2.2°), and Mars trine Saturn (orb 4.6°). 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 triangle: Jupiter, Sun, and Mars
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 Jupiter (growth, faith, luck, and confidence in the future), Sun (identity, confidence, and direction), and Mars (action, anger, desire, and courage).
This is the clearest friction pattern in the chart: Sun square Jupiter (orb 2°), Mars opposite Jupiter (orb 2.4°), and Sun square Mars (orb 4.4°). 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 Cancer remains a reliable combination even without a birth time. The Sun describes identity, ego, father figure, visibility, and direction, with Cancer style: memory, protection, belonging, and family sensitivity.
Concretely, the person expresses identity, ego, father figure, recognition, and personal direction through the Cancer style (memory, protection, belonging, and family sensitivity). Exact aspects and repeated patterns indicate whether this theme becomes central.
Aspect connected to this placement: Sun square Jupiter (orb 2°). Aspect effect: creates tension between ego, father image, confidence, and excess: the person may need to separate real personal direction from an oversized promise.
Sun square Jupiter (orb 2°) creates concrete friction between the two planets. The orb is tight enough to count in the main reading.
Here, Sun in Cancer brings identity, ego, father figure, visibility, and direction with Cancer style (memory, protection, belonging, and family sensitivity); Jupiter in Libra brings personal fulfillment, confidence, encouragement, and broader horizons with Libra style (relationship, balance, negotiation, and sense of form).
Concrete friction: this aspect creates tension between ego, father image, confidence, and excess: the person may need to separate real personal direction from an oversized promise.
Sun square Mars (orb 4.4°) creates concrete friction between the two planets. The orb is moderate; it stays secondary beside tighter signatures.
Concrete friction: this aspect creates visible tension between ego, father image, and action: will can feel attacked, blocked, or forced to prove strength, sometimes through a weak, absent, inhibiting, or castrating father image.
Sun square Lilith (orb 4.6°) creates concrete friction between the two planets. The orb is moderate; it stays secondary beside tighter signatures.
Concrete friction: this aspect puts ego and personal image under pressure from Lilith's absolute ideal and refusal of compromise.
Moon in Gemini 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 Gemini style: curiosity, language, movement, and mental adaptation.
Concretely, the person expresses personal dream, play instinct, inner child, childhood imprint, mother figure, mother image, optimism, and inner rhythm through the Gemini style (curiosity, language, movement, and mental adaptation). Exact aspects and repeated patterns indicate whether this theme becomes central.
Aspect connected to this placement: Moon sextile Uranus (orb 0.1°). Aspect effect: lets personal dream and change cooperate without breaking the inner rhythm. Mother-image layer: childhood, mother image, and inner child can cooperate with Uranus.
Time-sensitive Moon aspect: Moon sextile Uranus (orb 0.1°). Because the birth time is unknown, the Moon's exact degree can shift during the day. This interpretation stays provisional and gains weight only if the aspect remains tight across the possible birth window or repeats another clear signature.
Here, Moon in Gemini brings personal dream, play, inner child, childhood imprint, mother figure, mother image, optimism, and inner rhythm with Gemini style (curiosity, language, movement, and mental adaptation); Uranus in Leo brings disruption, independence, and change with Leo style (presence, pride, creation, and the wish to be seen).
Concrete cooperation: personal dream and change can cooperate without breaking the inner rhythm. Mother-image layer: childhood, mother image, and inner child can cooperate with Uranus.
Time-sensitive Moon aspect: Moon sextile Mercury (orb 3.4°). Because the birth time is unknown, the Moon's exact degree can shift during the day. This interpretation stays provisional and gains weight only if the aspect remains tight across the possible birth window or repeats another clear signature.
Here, Moon in Gemini brings personal dream, play, inner child, childhood imprint, mother figure, mother image, optimism, and inner rhythm with Gemini style (curiosity, language, movement, and mental adaptation); Mercury in Leo brings intellect, language, thought, and technique with Leo style (presence, pride, creation, and the wish to be seen).
Concrete cooperation: personal dream and intellect can cooperate when words give a living form to the inner image. Mother-image layer: childhood, mother image, and inner child can cooperate with Mercury.
The Rising sign cannot be determined if the time is not known.
Mercury in Leo remains a reliable combination even without a birth time. Mercury describes intellect, language, thought, and technique, with Leo style: presence, pride, creation, and the wish to be seen.
Concretely, the person expresses thinking, speech, learning, technique, and mental strategy 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: Mercury conjunct Uranus (orb 3.3°). Aspect effect: ties intellect to Uranus: fast thought, mental rupture, sudden humor, invention, and refusal of ready-made ideas come out together.
Mercury trine Lilith (orb 2°) shows positive structural ease between the two planets. The orb is tight enough to count in the main reading.
Here, Mercury in Leo brings intellect, language, thought, and technique with Leo style (presence, pride, creation, and the wish to be seen); Lilith in Aries brings pure ideal, absolute demand, fascination, and refusal of compromise with Aries style (initiative, speed, confrontation, and direct action).
Concrete support: Lilith's ideal can support intellect by naming clearly what others avoid.
Mercury conjunct Uranus (orb 3.3°) brings the two planets out together. The orb is tight enough to count in the main reading.
Here, both planets use the same Leo style (presence, pride, creation, and the wish to be seen). Mercury in Leo brings intellect, language, thought, and technique; Uranus in Leo brings disruption, independence, and change.
Concrete effect: this aspect ties intellect to Uranus: fast thought, mental rupture, sudden humor, invention, and refusal of ready-made ideas come out together.
Same aspect, other side: the full reading is under the other planet, and it also applies to Mercury.
Venus in Gemini remains a reliable combination even without a birth time. Venus describes desire, taste, relationship, and attraction, with Gemini style: curiosity, language, movement, and mental adaptation.
Concretely, the person expresses desire, taste, attraction, pleasure, and love style through the Gemini style (curiosity, language, movement, and mental adaptation). Exact aspects and repeated patterns indicate whether this theme becomes central.
Aspect connected to this placement: Venus opposite Saturn (orb 0.8°). Aspect effect: opposes the desire for connection to reserve, fear of lack, or high standards.
Venus opposite Saturn (orb 0.8°) puts the two planets face to face, with visible back-and-forth or tension. The orb is extremely tight; this aspect is one of the chart's strongest signals.
Here, Venus in Gemini brings desire, taste, relationship, and attraction with Gemini style (curiosity, language, movement, and mental adaptation); Saturn in Sagittarius brings discipline, constraint, endurance, and mastery with Sagittarius style (expansion, travel, belief, and the search for meaning).
Concrete conflict: this aspect opposes the desire for connection to reserve, fear of lack, or high standards.
Venus trine Jupiter (orb 3°) shows positive structural ease between the two planets. The orb is tight enough to count in the main reading.
Here, Venus in Gemini brings desire, taste, relationship, and attraction with Gemini style (curiosity, language, movement, and mental adaptation); Jupiter in Libra brings personal fulfillment, confidence, encouragement, and broader horizons with Libra style (relationship, balance, negotiation, and sense of form).
Concrete support: this aspect gives positive ease between charm, desire, generosity, and fulfillment: attraction can open horizons.
Venus sextile Lilith (orb 3.6°) shows active cooperation between the two planets. The orb is moderate; it stays secondary beside tighter signatures.
Concrete cooperation: Venus can use Lilith's ideal actively, giving attraction or art a precise uncompromising charge.
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.
Aspect connected to this placement: Mars opposite Jupiter (orb 2.4°). Aspect effect: sets direct action against the drive for fulfillment: courage can answer excess, risk, or the need to think too big.
Mars opposite Jupiter (orb 2.4°) puts the two planets face to face, with visible back-and-forth or tension. The orb is tight enough to count in the main reading.
Here, Mars in Aries brings action, courage, competition, and effort with Aries style (initiative, speed, confrontation, and direct action); Jupiter in Libra brings personal fulfillment, confidence, encouragement, and broader horizons with Libra style (relationship, balance, negotiation, and sense of form).
Concrete conflict: this aspect sets direct action against the drive for fulfillment: courage can answer excess, risk, or the need to think too big.
Mars trine Saturn (orb 4.6°) shows positive structural ease between the two planets. The orb is moderate; it stays secondary beside tighter signatures.
Concrete support: this aspect gives positive ease between courage and discipline: action becomes more enduring, strategic, and able to hold under pressure.
Mars trine Pluto (orb 5.7°) shows positive structural ease between the two planets. The orb is moderate; it stays secondary beside tighter signatures.
Concrete support: this aspect gives natural support for action under pressure: Mars can thrive in danger, competition, or crisis instead of freezing.
Same aspect, other side: the full reading is under the other planet, and it also applies to Mars.
Jupiter in Libra remains a reliable combination even without a birth time. Jupiter describes personal fulfillment, confidence, encouragement, and broader horizons, with Libra style: relationship, balance, negotiation, and sense of form.
Concretely, the person expresses personal fulfillment, confidence, and opening of horizons through the Libra style (relationship, balance, negotiation, and sense of form). 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.
Same aspect, other side: the full reading is under the other planet, and it also applies to Jupiter.
Jupiter sextile Saturn (orb 2.2°) shows active cooperation between the two planets. The orb is tight enough to count in the main reading.
Here, Jupiter in Libra brings personal fulfillment, confidence, encouragement, and broader horizons with Libra style (relationship, balance, negotiation, and sense of form); Saturn in Sagittarius brings discipline, constraint, endurance, and mastery with Sagittarius style (expansion, travel, belief, and the search for meaning).
Concrete cooperation: broad ambition and discipline can cooperate gradually.
Same aspect, other side: the full reading is under the other planet, and it also applies to Jupiter.
Saturn in Sagittarius remains a reliable combination even without a birth time. Saturn describes discipline, constraint, endurance, and mastery, with Sagittarius style: expansion, travel, belief, and the search for meaning.
Concretely, the person expresses discipline, limits, duty, fear, and long construction through the Sagittarius style (expansion, travel, belief, and the search for meaning). 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.
Same aspect, other side: the full reading is under the other planet, and it also applies to Saturn.
Saturn trine Lilith (orb 4.4°) shows positive structural ease between the two planets. The orb is moderate; it stays secondary beside tighter signatures.
Concrete support: this aspect gives natural positive support between Saturn (discipline, constraint, endurance, and mastery) and Lilith (pure ideal, absolute demand, fascination, and refusal of compromise).
Same aspect, other side: the full reading is under the other planet, and it also applies to Saturn.
Uranus in Leo remains a reliable combination even without a birth time. Uranus describes disruption, independence, and change, with Leo style: presence, pride, creation, and the wish to be seen.
Concretely, the person expresses freedom, disruption, broken rhythms, and the need for independence 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 Uranus.
Same aspect, other side: the full reading is under the other planet, and it also applies to Uranus.
Neptune in Scorpio remains a reliable combination even without a birth time. Neptune describes imagination, image, popularity, collective moods, and inspiration, with Scorpio style: intensity, desire, crisis, secrecy, and invisible power.
Concretely, the person expresses imagination, image, popularity, and the ability to read collective currents through the Scorpio style (intensity, desire, crisis, secrecy, and invisible power). Exact aspects and repeated patterns indicate whether this theme becomes central.
Pluto in Virgo remains a reliable combination even without a birth time. Pluto describes crisis, power, survival, and regeneration, with Virgo style: precision, method, usefulness, and attention to detail.
Concretely, the person expresses crisis, power, sexuality, survival, and transformation 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 Pluto.
Lilith in Aries remains a reliable combination even without a birth time. Lilith describes pure ideal, absolute demand, fascination, and refusal of compromise, with Aries style: initiative, speed, confrontation, and direct action.
Concretely, the person expresses the pure ideal, absolute demand, desire, fascination, and what refuses to become ordinary through the Aries style (initiative, speed, confrontation, and direct action). 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 Lilith.
Same aspect, other side: the full reading is under the other planet, and it also applies to Lilith.
Same aspect, other side: the full reading is under the other planet, and it also applies to Lilith.
Same aspect, other side: the full reading is under the other planet, and it also applies to Lilith.
