---
title: "Panchang: Chandrashtama for a person"
method: POST
path: "/vedic/panchang/chandrashtama"
tags: ["Vedic"]
---

# Panchang: Chandrashtama for a person

`POST /vedic/panchang/chandrashtama`

## Request

- Base URL: `https://api.astroway.info/v1`
- URL: `https://api.astroway.info/v1/vedic/panchang/chandrashtama`
- Auth: API key in header `X-Api-Key`
- TypeScript: <https://skmtc.dev/astroway/apis/astroway-calculation-api/docs/vedic/panchang/chandrashtama/post.ts> (a function with typed inputs; its response is checked against the schema)

Spans when the Moon transits the 8th sign from the natal Moon sign, over `days` (1 to 366) from `date`. Natal Moon from `birth` or `janmaRashi`. Each span keeps its full start and end.

## Query parameters

- `fields` string
- `precision` integer

## Headers

- `Idempotency-Key` string

## Request body

- ChandrashtamaInput: A person (birth, or janmaRashi) and a date range. Returns the spans when the Moon is in the 8th sign from the natal Moon sign.
  - `birth` object: Birth data. The natal Moon sign and birth star are computed from it (sidereal, the ayanamsa of the request).
    - `date` string, required
    - `time` string, required
    - `timezoneOffset` number, nullable: Hours from UTC at the given moment, not minutes. Fractional zones are hours too: 5.5 for India, 5.75 for Nepal, -3.5 for Newfoundland. Defaults to 0, meaning UTC. Ignored when timezone is sent.
    - `timezone` string: IANA zone name such as Europe/Kyiv, or auto to look the zone up from latitude and longitude. The server takes the offset that zone kept at this local date and time, summer time included, and uses it in place of timezoneOffset. A clock time that happened twice takes the first occurrence; one skipped when clocks went forward takes the offset from before the change. Abbreviations such as EST are refused. Before 1970 the tz database is not reliable for every place, so send timezoneOffset when the local clock is known.
    - `latitude` number, required
    - `longitude` number, required
    - `houseSystem` 'P' | 'K' | 'R' | 'C' | 'E' | 'W' | 'B' | 'M' | 'O' | 'A' | 'T' | 'V' | 'D' | 'F' | 'G' | 'H' | 'I' | 'i' | 'L' | 'N' | 'Q' | 'S' | 'U' | 'X' | 'Y'
    - `name` string
    - `city` string
    - `zodiacType` 'tropical' | 'sidereal'
    - `ayanamsaId` number, nullable
    - `ayanamsa` 'fagan-bradley' | 'lahiri' | 'de-luce' | 'raman' | 'krishnamurti' | 'kp' | 'yukteshwar' | 'jn-bhasin' | 'true-citra' | 'djwhal-khul': Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.
    - `cosmogram` boolean
  - `janmaRashi` 'Mesha' | 'Vrishabha' | 'Mithuna' | 'Karka' | 'Simha' | 'Kanya' | 'Tula' | 'Vrishchika' | 'Dhanu' | 'Makara' | 'Kumbha' | 'Meena': Natal Moon sign, when birth is not sent: Mesha ... Meena.
  - `janmaNakshatra` integer: Birth star 1 (Ashwini) to 27 (Revati), when birth is not sent.
  - `date` string, required: First day of the range, YYYY-MM-DD, from local midnight.
  - `days` integer: Length of the range in days, 1 to 366. Default 30.
  - `timezoneOffset` number, nullable: Hours from UTC at the given moment, not minutes. Fractional zones are hours too: 5.5 for India, 5.75 for Nepal, -3.5 for Newfoundland. Defaults to 0, meaning UTC. Ignored when timezone is sent.
  - `timezone` string: IANA zone name such as Europe/Kyiv, or auto to look the zone up from latitude and longitude. The server takes the offset that zone kept at this local date and time, summer time included, and uses it in place of timezoneOffset. A clock time that happened twice takes the first occurrence; one skipped when clocks went forward takes the offset from before the change. Abbreviations such as EST are refused. Before 1970 the tz database is not reliable for every place, so send timezoneOffset when the local clock is known.
  - `ayanamsaId` number, nullable
  - `ayanamsa` 'fagan-bradley' | 'lahiri' | 'de-luce' | 'raman' | 'krishnamurti' | 'kp' | 'yukteshwar' | 'jn-bhasin' | 'true-citra' | 'djwhal-khul': Sidereal school by name. Lahiri when omitted. Equivalent to ayanamsaId; send either.

## Response `200`

Successful calculation

- object
  - `ok` boolean
  - `data` object
    - `method` string, nullable
    - `janmaRashi` string, nullable
    - `chandrashtamaRashi` string, nullable
    - `range` object, nullable
      - `from` string, nullable
      - `to` string, nullable
      - `days` number, nullable
    - `periods` object[], nullable
      - `start` string, nullable
      - `end` string, nullable
      - `hours` number, nullable
    - `rule` string, nullable

## Other responses

- `400`: Validation error
- `401`: Missing or invalid API key

## Changes

- **2026-11-07** `69a55e116a5e`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/astroway/apis/astroway-calculation-api/changes/vedic/panchang/chandrashtama/post.md)

---

[API](https://skmtc.dev/astroway/apis/astroway-calculation-api.md) - [All operations](https://skmtc.dev/astroway/apis/astroway-calculation-api/llms.txt) - [OpenAPI document](https://skmtc.dev/astroway/apis/astroway-calculation-api/revisions/bf266b2e6703?raw)