POST/v1/western/progressions/secondary

Western Secondary Progressions

Secondary progressed chart using the day-for-a-year method. Each day after birth symbolises one year of life (1 ephemeris day = 1 tropical year = 365.2421904 days). Returns all 10 progressed planet positions, the solar arc, and the progressed angles: MC = natal MC + solar arc in longitude, Ascendant derived from that MC (its RAMC) at the birth latitude. Defaults to today if no target_date provided.

Request parameters

locationoptional

string | null

City name to resolve to lat/lon/tz automatically. Example: 'Mumbai' or 'New Delhi, India'. If provided, latitude, longitude and timezone are not required.

nameoptional

string

Person name associated with the birth record

daterequired

string

Birth date in YYYY-MM-DD format

timeoptional

string | null

Birth time in HH:MM 24-hour format. If omitted, the chart is cast for 06:00 local time (not a sunrise chart) and birth_time_provided is false: houses, the Ascendant, the sect and the Moon's exact degree are then approximate.

latitudeoptional

number | null

Latitude. Required if location not provided.

longitudeoptional

number | null

Longitude. Required if location not provided.

timezoneoptional

string | null

IANA timezone. Required if location not provided (unless utc_offset is given). For dates before the zone adopted a standard time, the birthplace's local mean time (longitude / 15 hours) is used.

utc_offsetoptional

string | null

Optional explicit UTC offset of the birth time, as ±HH:MM or ±HH:MM:SS (e.g. '+04:51:31' for Bombay mean time). Overrides the offset timezone would give. Use it when the birth record states the offset, or for historical local times the IANA database cannot represent.

ayanamsaoptional

string

Ignored on Western endpoints: positions are always tropical (no ayanamsa). Accepted so one birth object can be sent to Vedic and Western endpoints alike.

target_dateoptional

string | null

Target date for progressions YYYY-MM-DD. Defaults to today.

Response fields

success

boolean

True if the request succeeded

message

string

Human-readable status message

data

object

data.birth_time_provided

boolean

True when a birth time was supplied. False when it was not: house, Ascendant and Moon-dependent results then carry the accuracy limits of an unknown birth time.

data.target_date

string

data.progressed_jd

number

data.age_years

number

Age in tropical years at target date

data.solar_arc

number

Solar arc in degrees (~1° per year)

data.natal_sun_longitude

number

data.progressed_sun_longitude

number

data.progressed_planets

array[object]

data.progressed_planets[].name

string

data.progressed_planets[].longitude

number

data.progressed_planets[].sign

string

data.progressed_planets[].sign_index

integer

data.progressed_planets[].degree_in_sign

number

data.progressed_planets[].is_retrograde

boolean

data.progressed_planets[].dignity

string

data.progressed_planets[].dignity_score

integer

Weight of the primary sign-level dignity only: domicile=5, exaltation=4, detriment=-5, fall=-4, peregrine=0. Triplicity, term and face are not scored, and the weights are not summed (e.g. Mercury in Virgo scores 5 for domicile, not 5+4). Full traditional scoring is in essential_dignities (natal and return charts).

data.progressed_planets[].dignity_disputed

boolean

True for outer planet (Uranus/Neptune/Pluto) exaltation/fall — no established consensus.

data.progressed_ascendant

number

Progressed Ascendant: the Ascendant that goes with progressed_mc — derived from the progressed MC's right ascension (RAMC) at the birth latitude (Placidus).

data.progressed_ascendant_sign

string

data.progressed_mc

number

Progressed MC: natal MC advanced by the solar arc in longitude

data.progressed_mc_sign

string

Errors

api_key_invalid

Invalid API key format.

api_key_missing

API key is missing. Include it in the Authorization header as 'Bearer YOUR_KEY'.

api_key_not_found

The provided API key was not found. Verify the key in your Asterwise dashboard.

api_key_revoked

This API key has been revoked.

burst_limit_exceeded

Too many requests per minute. Please slow down.

internal_error

Something went wrong on our end. Please try again, or contact [email protected] if the problem persists. Include your request_id when contacting support.

ip_rate_limit_exceeded

Too many requests from this IP address. Please slow down.

monthly_usage_limit_exceeded

Monthly API call limit reached. Upgrade your plan to continue.

payload_too_large

Request body exceeds maximum allowed size of 64KB.

subscription_expired

Your subscription has expired. Please renew at asterwise.com/dashboard to continue.

validation_error

The request couldn't be processed. See the 'details' field for specific field-level issues.

Related endpoints

• Annual profections
• Western Solar Arc Directions

Request

POST·application/json

curl

curl -X POST "https://api.asterwise.com/v1/western/progressions/secondary" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name":"Arjun Mehta","date":"1985-11-12","time":"06:45","latitude":19.076,"longitude":72.8777,"timezone":"Asia/Kolkata","target_date":"2026-01-01"}'

Python

import asterwise
from asterwise.api.western_astrology_api import WesternAstrologyApi
from asterwise.models.progression_request import ProgressionRequest

configuration = asterwise.Configuration(
    host="https://api.asterwise.com",
    access_token="YOUR_API_KEY",
)

request = ProgressionRequest(
    name="Arjun Mehta",
    date="1985-11-12",
    time="06:45",
    latitude=19.076,
    longitude=72.8777,
    timezone="Asia/Kolkata",
    target_date="2026-01-01",
)

with asterwise.ApiClient(configuration) as client:
    api = WesternAstrologyApi(client)
    result = api.western_progressions_secondary(progression_request=request)
    print(result)

TypeScript

import { createClient, createConfig, westernProgressionsSecondary } from 'asterwise';

const client = createClient(createConfig({
  baseUrl: 'https://api.asterwise.com',
  headers: { Authorization: 'Bearer YOUR_API_KEY' },
}));

const result = await westernProgressionsSecondary({
  client,
  body: {
      "name": "Arjun Mehta",
      "date": "1985-11-12",
      "time": "06:45",
      "latitude": 19.076,
      "longitude": 72.8777,
      "timezone": "Asia/Kolkata",
      "target_date": "2026-01-01"
  },
});

console.log(result.data);

Response

200 OK·application/jsonsigned

{
  "success": true,
  "message": "success",
  "data": {
    "target_date": "2026-01-01",
    "progressed_jd": 2446421.691065,
    "age_years": 40.139,
    "solar_arc": 40.677288,
    "natal_sun_longitude": 229.596716,
    "progressed_sun_longitude": 270.274004,
    "progressed_planets": [
      {
        "name": "Sun",
        "longitude": 270.274004,
        "sign": "Capricorn",
        "sign_index": 9,
        "degree_in_sign": 0.274004,
        "is_retrograde": false,
        "dignity": "peregrine",
        "dignity_score": 0,
        "dignity_disputed": false
      },
      {
        "name": "Moon",
        "longitude": 34.377518,
        "sign": "Taurus",
        "sign_index": 1,
        "degree_in_sign": 4.377518,
        "is_retrograde": false,
        "dignity": "exaltation",
        "dignity_score": 4,
        "dignity_disputed": false
      },
      "... and 8 more items"
    ],
    "progressed_ascendant": 263.011685,
    "progressed_ascendant_sign": "Sagittarius",
    "progressed_mc": 181.022164,
    "progressed_mc_sign": "Libra"
  }
}