How the zodiac ranking is calculated
An Aporr editorial index comparing the daily themes of the twelve Sun signs. It is not a probability of good fortune or a ranking of real people.
What we learned from other services
Cafe Astrology distinguishes solar-chart horoscopes from personal birth-chart reports. Astrology.com describes placing each sign in the first house to interpret planetary placements. Aporr draws on this general-horoscope approach; the scoring table and ranking formula below are our own, not a reproduction of another service’s private algorithm.
Date and sky model
We use your device/browser date and time zone. The local day from midnight to midnight is divided into four equal intervals; the sky at each midpoint is weighted equally, including 23- and 25-hour daylight-saving days. Different time zones can yield different rankings for the same calendar date.
Astronomy Engine 2.1.19 computes geocentric tropical longitudes for the Sun, Moon, Mercury, Venus, Mars, Jupiter and Saturn. Each Sun sign becomes the first whole-sign solar house. We do not infer your actual Ascendant or natal houses.
Formula and weights
Final index = 0.7 × house index + 0.3 × ruler-aspect index, averaged over four daily samples. Higher values rank first. Values equal to eight decimal places share a rank; tied signs are displayed in zodiac order from Aries. Small differences do not imply meaningfully different fortunes.
House index = Σ(body weight × house value below) ÷ 8. Weights emphasize the daily rhythm: Moon 3; Sun, Mercury, Venus and Mars 1 each; Jupiter and Saturn 0.5 each. House values are editorial estimates of ease of expression, connection and action, not judgments of a life area’s worth.
| Body | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| sun (1) | 0.6 | 0.3 | 0.4 | 0.2 | 0.8 | -0.2 | 0.3 | -0.4 | 0.6 | 0.7 | 0.7 | -0.3 |
| moon (3) | 0.4 | 0.2 | 0.4 | 0.6 | 0.8 | -0.3 | 0.5 | -0.5 | 0.5 | 0.3 | 0.7 | -0.2 |
| mercury (1) | 0.5 | 0.5 | 0.8 | 0.2 | 0.5 | 0.5 | 0.6 | -0.1 | 0.7 | 0.6 | 0.6 | -0.2 |
| venus (1) | 0.7 | 0.7 | 0.4 | 0.6 | 0.9 | 0.2 | 0.9 | 0.1 | 0.5 | 0.4 | 0.8 | 0.1 |
| mars (1) | 0.3 | 0.1 | 0.4 | -0.3 | 0.3 | 0.5 | -0.4 | -0.5 | 0.3 | 0.6 | 0.3 | -0.5 |
| jupiter (0.5) | 0.7 | 0.6 | 0.4 | 0.5 | 0.8 | 0.2 | 0.7 | 0.1 | 0.9 | 0.7 | 0.9 | 0.2 |
| saturn (0.5) | -0.2 | 0.1 | 0.1 | -0.2 | -0.2 | 0.3 | -0.2 | -0.4 | 0.2 | 0.4 | 0.1 | -0.4 |
Traditional rulers: Aries/Scorpio = Mars, Taurus/Libra = Venus, Gemini/Virgo = Mercury, Cancer = Moon, Leo = Sun, Sagittarius/Pisces = Jupiter, Capricorn/Aquarius = Saturn.
For the ruler’s aspects to other bodies: 120° = +1, 60° = +0.6, 90° = −0.8, 180° = −0.6. At 0°, Venus/Jupiter = +0.6, Mars/Saturn = −0.6, other bodies = 0. Only deviations (orbs) under 3° count, multiplied by (1 − orb/3). Contributions are weighted by the other body and divided by the weight sum excluding the ruler. No blanket retrograde penalty, random numbers or user-count adjustment is applied.
Shared sign readings
For the same calendar date and sign, everyone receives the same shared reading. Positions at 12:00 UTC are mapped to whole-sign solar houses: the Moon selects the daily theme, Venus the relationship theme, and Mercury a practical prompt from authored interpretations. The first request publishes and stores all twelve signs in both languages; no per-visitor AI call is made, and published editions are not overwritten. Some sentences can recur while a body remains in the same house.
Your device’s local midnight selects the next date edition, also checked when you return to the page. Shared prose uses the same UTC reference worldwide, while the ranking averages four samples across your local day. The prose does not explain the numerical rank or replace an individual birth chart.
Interpretive limits
Aspects, houses and rulers are astrological interpretive concepts; the 70:30 split, weights, house values and 3° orb are Aporr editorial choices. This is not an industry-certified formula, empirically validated fortune prediction, or a method already reviewed by a professional astrologer. Challenging aspects can support growth; a lower rank does not mean misfortune. Personal horoscopes use separate birth-chart evidence and may differ from this general ranking.
Calculation record for this date
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References
- Cafe Astrology · Solar charts and personal charts ›
- Astrology.com · How sign horoscopes are written ›
- Astrodienst · Aspects ›
- Astrodienst · Houses ›
- Astrodienst · Traditional rulers ›
- Astronomy Engine · Calculation library ›
aporr-zodiac-ranking-v1 · Method published: 2026.10.08
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