Gauquelin Sectors — Michel Gauquelin's Statistical Method, Now Available

Michel Gauquelin's decades of statistical research on planetary positions and professional eminence didn't use the standard 12-house division — he split the diurnal circle into 36 sectors, three per traditional house, to get finer resolution on where planets clustered relative to the four angles.

What a sector is

Instead of dividing each quadrant into 3 houses by time, Gauquelin divided it into 9 sectors — 36 total around the full diurnal circle. Each planet's sector position is returned as a decimal: the whole-number part is the sector (1-36), the fraction is how far through it the planet falls.

Real request/response

GET /api/v1/horoscope/gauquelin-sectors?dob=27/08/1976&tob=10:05&lat=12.98&lon=77.59&tz=5.5&api_key=...

{
  "status": 200,
  "response": {
    "sectors": [
      { "planet": "Sun", "sector": 6.6822 },
      { "planet": "Moon", "sector": 4.5158 },
      { "planet": "Jupiter", "sector": 16.0428 },
      { "planet": "Saturn", "sector": 8.9608 }
    ]
  }
}

Why this uses the house-position method, not literal rise/set

Gauquelin's own research used the actual observed rise/set times of each planet. We tested that approach directly against Swiss Ephemeris and found it fails unpredictably for slower-moving planets like Jupiter and Saturn — on a meaningful fraction of real dates, the rise/set search simply doesn't converge, for reasons inherent to the search algorithm rather than a bug in this integration.

Rather than ship an endpoint that silently drops data for certain planets on certain dates, this endpoint uses the Placidus house-position method instead — reliable for every planet, every date, tested across multiple dates and all seven classical planets with zero failures. The tradeoff is documented, not hidden.

Who this is for

Statistically-minded astrologers and researchers working with the Gauquelin method specifically, or anyone building tools around planetary prominence and vocational astrology in the Western statistical tradition. Available on Starter plan and above.