When To Use It

Use converse secondary when you intentionally want a reverse symbolic timing technique for research, comparison work, or a specialized astrologer workflow.

How It Differs From Secondary

The request shape is almost identical to secondary. The main difference is interpretive direction: converse secondary symbolically walks backward from birth instead of forward.

Minimal Request

curl -X POST "https://api.freeastroapi.com/api/v1/western/progressions/converse-secondary" \
 -H "Content-Type: application/json" \
 -H "x-api-key: YOUR_API_KEY" \
 -d '{
  "natal": {
    "name": "User",
    "datetime": "1990-01-01 12:00",
    "time_known": true,
    "location": {
      "city": "London",
      "lat": 51.5074,
      "lng": -0.1278,
      "tz_str": "AUTO"
    }
  },
  "converse_secondary_progression": {
    "target_date": "2026-03-30"
  }
}'

Table Mode

curl -X POST "https://api.freeastroapi.com/api/v1/western/progressions/converse-secondary?response_mode=table" \
 -H "Content-Type: application/json" \
 -H "x-api-key: YOUR_API_KEY" \
 -d '{
  "natal": {
    "name": "User",
    "datetime": "1990-01-01 12:00",
    "time_known": true,
    "location": {
      "city": "London",
      "lat": 51.5074,
      "lng": -0.1278,
      "tz_str": "AUTO"
    }
  },
  "converse_secondary_progression": {
    "target_date": "2026-03-30"
  }
}'

Real API Response Example

Captured from the live API on April 14, 2026 using the minimal request above.

{
  "meta": {
    "endpoint": "progressions_chart",
    "version": "v1",
    "system": "converse_secondary",
    "zodiac_type": "tropical",
    "house_system": "placidus",
    "calculation_method": "converse_secondary_progressions_day_for_year",
    "target_date": "2026-03-30",
    "target_datetime": "2026-03-30T00:00:00Z",
    "orb_deg": 1,
    "generated_at": "2026-04-14T15:54:51Z"
  },
  "progression_basis": {
    "age_years_decimal": 36.240337,
    "progressed_days_after_birth": -36.240337,
    "natal_datetime_utc": "1990-01-01T12:00:00Z",
    "progressed_datetime_utc": "1989-11-26T06:13:54Z"
  },
  "progressed_chart": {
    "points": {
      "sun": {
        "name": "Sun",
        "longitude_deg": 243.967833,
        "longitude_text": "03°58' Sag",
        "latitude_deg": -0.000249,
        "distance_au": 0.986904,
        "sign": {
          "name": "Sagittarius",
          "index": 8,
          "abbr": "Sag"
        },
        "position_in_sign_deg": 3.967833,
        "house": 1,
        "retrograde": false
      },
      "moon": {
        "name": "Moon",
        "longitude_deg": 220.39864,
        "longitude_text": "10°24' Sco",
        "latitude_deg": -4.934687,
        "distance_au": 0.002711,
        "sign": {
          "name": "Scorpio",
          "index": 7,
          "abbr": "Sco"
        },
        "position_in_sign_deg": 10.39864,
        "house": 12,
        "retrograde": false
      },
      "mercury": {
        "name": "Mercury",
        "longitude_deg": 252.642221,
        "longitude_text": "12°39' Sag",
        "latitude_deg": -1.575638,
        "distance_au": 1.41279,
        "sign": {
          "name": "Sagittarius",
          "index": 8,
          "abbr": "Sag"
        },
        "position_in_sign_deg": 12.642221,
        "house": 1,
        "retrograde": false
      }
    },
    "angles": {
      "ascendant": {
        "longitude_deg": 228.049,
        "longitude_text": "18°03' Sco",
        "sign": {
          "name": "Scorpio",
          "index": 7,
          "abbr": "Sco"
        },
        "position_in_sign_deg": 18.049
      },
      "midheaven": {
        "longitude_deg": 156.774,
        "longitude_text": "06°46' Vir",
        "sign": {
          "name": "Virgo",
          "index": 5,
          "abbr": "Vir"
        },
        "position_in_sign_deg": 6.774
      }
    }
  },
  "aspects": {
    "progressed_to_natal": [
      {
        "id": "p_saturn_conjunction_n_sun",
        "aspect": {
          "name": "conjunction",
          "angle_deg": 0
        },
        "progressed_point": "saturn",
        "natal_point": "sun",
        "orb_deg": 0.78,
        "separation_deg": 0.78,
        "applying": false,
        "exact": false,
        "polarity": "neutral",
        "strength": 0.26,
        "category": "major",
        "interpretation_key": "progressed_saturn_conjunction_natal_sun"
      },
      {
        "id": "p_neptune_conjunction_n_sun",
        "aspect": {
          "name": "conjunction",
          "angle_deg": 0
        },
        "progressed_point": "neptune",
        "natal_point": "sun",
        "orb_deg": 0.072,
        "separation_deg": 0.072,
        "applying": true,
        "exact": false,
        "exact_date": "2025-10-06T00:00:00Z",
        "polarity": "neutral",
        "strength": 0.999,
        "category": "major",
        "interpretation_key": "progressed_neptune_conjunction_natal_sun"
      },
      {
        "id": "p_pluto_sextile_n_saturn",
        "aspect": {
          "name": "sextile",
          "angle_deg": 60
        },
        "progressed_point": "pluto",
        "natal_point": "saturn",
        "orb_deg": 0.202,
        "separation_deg": 59.798,
        "applying": false,
        "exact": false,
        "exact_date": "2026-09-26T00:00:00Z",
        "polarity": "soft",
        "strength": 0.798,
        "category": "major",
        "interpretation_key": "progressed_pluto_sextile_natal_saturn"
      }
    ],
    "progressed_to_progressed": [
      {
        "id": "p_mars_conjunction_p_pluto",
        "aspect": {
          "name": "conjunction",
          "angle_deg": 0
        },
        "point_1": "mars",
        "point_2": "pluto",
        "orb_deg": 0.973,
        "separation_deg": 0.973,
        "applying": true,
        "exact": false,
        "polarity": "neutral",
        "strength": 0.027,
        "category": "major",
        "interpretation_key": "progressed_mars_conjunction_progressed_pluto"
      },
      {
        "id": "p_neptune_conjunction_p_saturn",
        "aspect": {
          "name": "conjunction",
          "angle_deg": 0
        },
        "point_1": "neptune",
        "point_2": "saturn",
        "orb_deg": 0.852,
        "separation_deg": 0.852,
        "applying": false,
        "exact": false,
        "polarity": "neutral",
        "strength": 0.148,
        "category": "major",
        "interpretation_key": "progressed_neptune_conjunction_progressed_saturn"
      },
      {
        "id": "p_jupiter_trine_p_moon",
        "aspect": {
          "name": "trine",
          "angle_deg": 120
        },
        "point_1": "jupiter",
        "point_2": "moon",
        "orb_deg": 0.828,
        "separation_deg": 120.828,
        "applying": false,
        "exact": false,
        "exact_date": "2026-04-24T05:09:22Z",
        "polarity": "soft",
        "strength": 0.206,
        "category": "major",
        "interpretation_key": "progressed_jupiter_trine_progressed_moon"
      }
    ]
  }
}

Related Utility Pages

Exact ingresses, exact aspects, and calendar are available for this same system through the shared utility docs pages.