---
title: "Calculate named symbolic solar-arc directions"
method: POST
path: "/api/astro/solar-arcs"
tags: ["Calculations"]
---

# Calculate named symbolic solar-arc directions

`POST /api/astro/solar-arcs`

## Request

- Base URL: `https://api.cosmicephemeris.com`
- URL: `https://api.cosmicephemeris.com/api/astro/solar-arcs`
- Auth: one of:
  - HTTP bearer
  - API key in header `x-api-key`

Symbolic direct solar-arc directions applied uniformly to natal planets and Ascendant/MC, not a physical sky chart. Omitted method and explicit true_solar_arc preserve the predecessor actual tropical apparent-Sun arc. Explicit mean_naibod applies exactly 0.98564733 degrees per elapsed model year in longitude and does not sample a progressed Sun. Input timing matches secondary progressions: target UTC >= birth, fixed 365.2421904-day TT year, civil dates 1800–2200, strict fields/enums/numbers and DST/polar rejection. Sidereal uses the natal-date ayanamsa only. Equal/Whole Sign houses are synthetic from directed Ascendant, with MC independently directed. No relocation, converse/right-ascension arc, MC-derived angle recalculation, aspects, nodes, speeds or arbitrary key. True-Sun evaluation is bounded to 152 progressed TT days and at most 5 Sun intervals of 32 days; mean Naibod uses one constant-rate multiplication.

All plans use one standard quota unit. Each admitted request reserves one monthly usage unit before route validation or engine work; failed or timed-out admitted attempts are not refunded. Do not automatically retry. The mean-Naibod addition has no practitioner sign-off.
Historical mode uses an explicit BCE/CE date object and UT1 conventions. Its response is the versioned historical envelope, not the modern UTC envelope. Read result for calculation fields and metadata for limits and uncertainty.

## Request body

- union
  - SolarArcsRequest: Symbolic direct solar-arc directions applied uniformly to natal planets and Ascendant/MC, not a physical sky chart. Omitted method and explicit true_solar_arc preserve the existing actual tropical apparent-Sun arc. Explicit mean_naibod applies exactly 0.98564733 degrees per elapsed model year in longitude and does not sample a progressed Sun. Input timing matches secondary progressions: target UTC >= birth, fixed 365.2421904-day TT year, civil dates 1800–2200, strict fields/enums/numbers and DST/polar rejection. Sidereal uses the natal-date ayanamsa only. Equal/Whole Sign houses are synthetic from directed Ascendant, with MC independently directed. No relocation, converse/right-ascension arc, MC-derived angle recalculation, aspects, nodes, speeds or arbitrary key. True-Sun evaluation is bounded to 152 progressed TT days and at most 5 Sun intervals of 32 days; mean Naibod uses one constant-rate multiplication.
    - `birth` CalculationBirthInput, required: Strict nested birth input; no unknown properties, nulls, booleans or numeric strings. Known civil time required; semantic date/DST/undefined-angle validation occurs on the server.
      - `date` string, date, required: Valid Gregorian YYYY-MM-DD local civil date, inclusive 1800-01-01 through 2200-12-31. Calendar validity and timezone conversion are checked by the server.
      - `time` string, required: HH:MM or HH:MM:SS; no offset in this field. Use timezone to select the civil-time zone.
      - `timezone` string: Valid IANA zone; UTC when omitted. Ambiguous and nonexistent civil times are rejected.
      - `lat` number, required
      - `lon` number, required
    - `target` CivilTimeInput, required
      - `date` string, date, required: Valid Gregorian YYYY-MM-DD local civil date, inclusive 1800-01-01 through 2200-12-31. Calendar validity and timezone conversion are checked by the server.
      - `time` string, required: HH:MM or HH:MM:SS; no offset in this field. Use timezone to select the civil-time zone.
      - `timezone` string
    - `zodiac` 'tropical' | 'sidereal'
    - `ayanamsa` 'lahiri' | 'raman' | 'krishnamurti' | 'fagan_bradley' | 'yukteshwar' | 'sassanian' | 'true_chitra' | 'true_revati' | 'true_pushya' | 'galactic_center_0_sagittarius' | 'galactic_alignment_mardyks'
    - `house_system` 'equal' | 'whole_sign'
    - `method` 'true_solar_arc' | 'mean_naibod'
  - HistoricalSolarArcsRequest: Explicit historical mode, 1000 BCE (BC)–2500 CE (AD). No year zero, implicit calendar, UTC or IANA zone. Preserve tool-specific mathematical, geographic and search limits; calendar/time conventions and estimated Delta-T are not certified historical accuracy.
    - `birth` HistoricalBirthInput, required
      - `date` HistoricalDate, required: Explicit civil date, 1000 BCE (BC)–2500 CE (AD); no year zero. Calendar validity is checked by the server. Available only on documented connected historical operations, with explicit UT1/fixed-offset conventions.
        - `year` integer, required
        - `era` 'BCE' | 'CE', required: Display BCE (BC) / CE (AD); API values remain BCE / CE. No year zero.
        - `month` integer, required
        - `day` integer, required
        - `calendar` 'proleptic_gregorian' | 'proleptic_julian', required: Explicit choice; applies the selected calendar rules throughout history without a regional adoption switch.
      - `time` string, required: Explicit HH:MM[:SS]; whole seconds only, no leap seconds. Normalized helper output includes seconds.
      - `timezone` string, required: Explicit UT1 or fixed offset UT1+/-HH:MM[:SS], within 14 hours. Local clock minus offset yields UT1, not UTC. No IANA timezone inference. Original offset spelling is preserved.
      - `lat` number, required
      - `lon` number, required
    - `target` HistoricalDateTime, required: Shared historical input contract; parsing alone does not enable a calculation route. Derived calculation records can include fractional seconds and are not this input type.
      - `date` HistoricalDate, required: Explicit civil date, 1000 BCE (BC)–2500 CE (AD); no year zero. Calendar validity is checked by the server. Available only on documented connected historical operations, with explicit UT1/fixed-offset conventions.
        - `year` integer, required
        - `era` 'BCE' | 'CE', required: Display BCE (BC) / CE (AD); API values remain BCE / CE. No year zero.
        - `month` integer, required
        - `day` integer, required
        - `calendar` 'proleptic_gregorian' | 'proleptic_julian', required: Explicit choice; applies the selected calendar rules throughout history without a regional adoption switch.
      - `time` string, required: Explicit HH:MM[:SS]; whole seconds only, no leap seconds. Normalized helper output includes seconds.
      - `timezone` string, required: Explicit UT1 or fixed offset UT1+/-HH:MM[:SS], within 14 hours. Local clock minus offset yields UT1, not UTC. No IANA timezone inference. Original offset spelling is preserved.
    - `zodiac` 'tropical' | 'sidereal'
    - `ayanamsa` 'lahiri' | 'raman' | 'krishnamurti' | 'fagan_bradley' | 'yukteshwar' | 'sassanian' | 'true_chitra' | 'true_revati' | 'true_pushya' | 'galactic_center_0_sagittarius' | 'galactic_alignment_mardyks'
    - `house_system` 'equal' | 'whole_sign'
    - `method` 'true_solar_arc' | 'mean_naibod'

## Response `200`

Successful calculation. Field nesting is specific to this route.

- union
  - SolarArcsResponse
    - `type` 'solar_arcs', required
    - `status` 'current', required
    - `method` 'true_solar_arc' | 'mean_naibod', required
    - `input` object, required
      - `birth` CalculationMomentResult, required
        - `date` string, date, required: Valid Gregorian YYYY-MM-DD local civil date, inclusive 1800-01-01 through 2200-12-31. Calendar validity and timezone conversion are checked by the server.
        - `time` string, required: HH:MM or HH:MM:SS; no offset in this field. Use timezone to select the civil-time zone.
        - `timezone` string, required: Valid IANA zone; UTC when omitted. Ambiguous and nonexistent civil times are rejected.
        - `lat` number, required
        - `lon` number, required
      - `target` object, required
        - `date` string, date, required: Valid Gregorian YYYY-MM-DD local civil date, inclusive 1800-01-01 through 2200-12-31. Calendar validity and timezone conversion are checked by the server.
        - `time` string, required: HH:MM or HH:MM:SS; no offset in this field. Use timezone to select the civil-time zone.
        - `timezone` string, required
      - `zodiac` 'tropical' | 'sidereal', required
      - `ayanamsa` 'lahiri' | 'raman' | 'krishnamurti' | 'fagan_bradley' | 'yukteshwar' | 'sassanian' | 'true_chitra' | 'true_revati' | 'true_pushya' | 'galactic_center_0_sagittarius' | 'galactic_alignment_mardyks', required
      - `house_system` 'equal' | 'whole_sign', required
      - `method` 'mean_naibod'
    - `birth_utc` string, date-time, required: Normalized UTC timestamp; fractional seconds may be present.
    - `target_utc` string, date-time, required: Normalized UTC timestamp; fractional seconds may be present.
    - `progressed_utc` string, required: Derived UTC instant with six fractional digits. Second 60 is preserved during an actual recorded leap second; JavaScript Date and Python datetime cannot directly parse that value. Use progressed_tt_jd for display/reference only; no single-JD round-trip was used in the calculation.
    - `timing` object, required
      - `year_days` 365.2421904, required
      - `elapsed_years` number, required
      - `progressed_days` number, required
      - `time_scale` 'TT', required
      - `progressed_tt_jd` number, required
    - `zodiac` 'tropical' | 'sidereal', required
    - `ayanamsa` 'lahiri' | 'raman' | 'krishnamurti' | 'fagan_bradley' | 'yukteshwar' | 'sassanian' | 'true_chitra' | 'true_revati' | 'true_pushya' | 'galactic_center_0_sagittarius' | 'galactic_alignment_mardyks', required
    - `natal_context` object, required
      - `planets` WesternPlanets, required
        - `Sun` WesternPoint, required
          - `lon` number, required
          - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
          - `deg_in_sign` number, required
        - `Moon` WesternPoint, required
          - `lon` number, required
          - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
          - `deg_in_sign` number, required
        - `Mercury` WesternPoint, required
          - `lon` number, required
          - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
          - `deg_in_sign` number, required
        - `Venus` WesternPoint, required
          - `lon` number, required
          - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
          - `deg_in_sign` number, required
        - `Mars` WesternPoint, required
          - `lon` number, required
          - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
          - `deg_in_sign` number, required
        - `Jupiter` WesternPoint, required
          - `lon` number, required
          - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
          - `deg_in_sign` number, required
        - `Saturn` WesternPoint, required
          - `lon` number, required
          - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
          - `deg_in_sign` number, required
        - `Uranus` WesternPoint, required
          - `lon` number, required
          - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
          - `deg_in_sign` number, required
        - `Neptune` WesternPoint, required
          - `lon` number, required
          - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
          - `deg_in_sign` number, required
        - `Pluto` WesternPoint, required
          - `lon` number, required
          - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
          - `deg_in_sign` number, required
      - `angles` WesternAngles, required
        - `ascendant` number, required
        - `mc` number, required
      - `houses` WesternHouses, required
        - `system` 'equal' | 'whole_sign', required
        - `cusps` object, required
          - `1` number, required
          - `2` number, required
          - `3` number, required
          - `4` number, required
          - `5` number, required
          - `6` number, required
          - `7` number, required
          - `8` number, required
          - `9` number, required
          - `10` number, required
          - `11` number, required
          - `12` number, required
    - `metadata` SolarArcsMetadata, required
      - `physical_chart` false, required
      - `source_frame` 'apparent-geocentric-ecliptic-of-each-ephemeris-date' | 'natal-apparent-geocentric-ecliptic-of-date-plus-fixed-mean-key', required
      - `position_precision` 'unrounded-binary64', required
      - `year_convention` 'fixed-365.2421904-days-not-calendar-birthdays', required
      - `time_policy` 'uniform-TT-elapsed-days-divided-by-year-days', required
      - `timescale_data` 'bundled-skyfield', required
      - `utc_output` 'leap-second-aware-ISO-8601', required
      - `arc_policy` 'direct-true-tropical-solar-arc-not-mean-naibod' | 'direct-mean-naibod-longitude-0.98564733-degrees-per-year', required
      - `arc_unwrap` 'positive-steps-at-most-32-TT-days-total-at-most-152-days' | 'constant-positive-rate-no-ephemeris-sun-sampling', required
      - `angle_policy` 'same-ecliptic-arc-added-to-natal-ascendant-and-mc', required
      - `house_policy` 'synthetic-equal-from-directed-ascendant' | 'synthetic-whole-sign-from-directed-ascendant', required
      - `location_policy` 'birth-location-for-natal-angles-no-relocation', required
      - `sidereal_policy` 'tropical-arc-on-natal-sidereal-points-natal-ayanamsa-only' | 'not-applicable', required
      - `aspects` 'not-included', required
      - `nodes` 'not-included', required
      - `speeds` 'not-included', required
      - `interpretations` false, required
      - `practitioner_review` 'not-completed', required
    - `arc` union, required
      - object
        - `degrees` number, required
        - `direction` 'direct', required
        - `basis` 'tropical-apparent-sun', required
        - `natal_sun_longitude` number, required
        - `progressed_sun_longitude` number, required
        - `key_degrees_per_year` 0.98564733
      - object
        - `degrees` number, required
        - `direction` 'direct', required
        - `basis` 'mean-naibod-longitude', required
        - `natal_sun_longitude` number
        - `progressed_sun_longitude` number
        - `key_degrees_per_year` 0.98564733, required
    - `directed_planets` WesternPlanets, required
      - `Sun` WesternPoint, required
        - `lon` number, required
        - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
        - `deg_in_sign` number, required
      - `Moon` WesternPoint, required
        - `lon` number, required
        - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
        - `deg_in_sign` number, required
      - `Mercury` WesternPoint, required
        - `lon` number, required
        - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
        - `deg_in_sign` number, required
      - `Venus` WesternPoint, required
        - `lon` number, required
        - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
        - `deg_in_sign` number, required
      - `Mars` WesternPoint, required
        - `lon` number, required
        - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
        - `deg_in_sign` number, required
      - `Jupiter` WesternPoint, required
        - `lon` number, required
        - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
        - `deg_in_sign` number, required
      - `Saturn` WesternPoint, required
        - `lon` number, required
        - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
        - `deg_in_sign` number, required
      - `Uranus` WesternPoint, required
        - `lon` number, required
        - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
        - `deg_in_sign` number, required
      - `Neptune` WesternPoint, required
        - `lon` number, required
        - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
        - `deg_in_sign` number, required
      - `Pluto` WesternPoint, required
        - `lon` number, required
        - `sign` 'Aries' | 'Taurus' | 'Gemini' | 'Cancer' | 'Leo' | 'Virgo' | 'Libra' | 'Scorpio' | 'Sagittarius' | 'Capricorn' | 'Aquarius' | 'Pisces', required
        - `deg_in_sign` number, required
    - `directed_angles` WesternAngles, required
      - `ascendant` number, required
      - `mc` number, required
    - `directed_houses` WesternHouses, required
      - `system` 'equal' | 'whole_sign', required
      - `cusps` object, required
        - `1` number, required
        - `2` number, required
        - `3` number, required
        - `4` number, required
        - `5` number, required
        - `6` number, required
        - `7` number, required
        - `8` number, required
        - `9` number, required
        - `10` number, required
        - `11` number, required
        - `12` number, required
  - HistoricalSolarArcsResponse
    - `schema` 'cosmicephemeris-historical-calculation-v1', required
    - `status` 'historical', required
    - `type` 'solar-arcs', required
    - `input` HistoricalSolarArcsRequest, required: Explicit historical mode, 1000 BCE (BC)–2500 CE (AD). No year zero, implicit calendar, UTC or IANA zone. Preserve tool-specific mathematical, geographic and search limits; calendar/time conventions and estimated Delta-T are not certified historical accuracy.
      - `birth` HistoricalBirthInput, required
        - `date` HistoricalDate, required: Explicit civil date, 1000 BCE (BC)–2500 CE (AD); no year zero. Calendar validity is checked by the server. Available only on documented connected historical operations, with explicit UT1/fixed-offset conventions.
          - `year` integer, required
          - `era` 'BCE' | 'CE', required: Display BCE (BC) / CE (AD); API values remain BCE / CE. No year zero.
          - `month` integer, required
          - `day` integer, required
          - `calendar` 'proleptic_gregorian' | 'proleptic_julian', required: Explicit choice; applies the selected calendar rules throughout history without a regional adoption switch.
        - `time` string, required: Explicit HH:MM[:SS]; whole seconds only, no leap seconds. Normalized helper output includes seconds.
        - `timezone` string, required: Explicit UT1 or fixed offset UT1+/-HH:MM[:SS], within 14 hours. Local clock minus offset yields UT1, not UTC. No IANA timezone inference. Original offset spelling is preserved.
        - `lat` number, required
        - `lon` number, required
      - `target` HistoricalDateTime, required: Shared historical input contract; parsing alone does not enable a calculation route. Derived calculation records can include fractional seconds and are not this input type.
        - `date` HistoricalDate, required: Explicit civil date, 1000 BCE (BC)–2500 CE (AD); no year zero. Calendar validity is checked by the server. Available only on documented connected historical operations, with explicit UT1/fixed-offset conventions.
          - `year` integer, required
          - `era` 'BCE' | 'CE', required: Display BCE (BC) / CE (AD); API values remain BCE / CE. No year zero.
          - `month` integer, required
          - `day` integer, required
          - `calendar` 'proleptic_gregorian' | 'proleptic_julian', required: Explicit choice; applies the selected calendar rules throughout history without a regional adoption switch.
        - `time` string, required: Explicit HH:MM[:SS]; whole seconds only, no leap seconds. Normalized helper output includes seconds.
        - `timezone` string, required: Explicit UT1 or fixed offset UT1+/-HH:MM[:SS], within 14 hours. Local clock minus offset yields UT1, not UTC. No IANA timezone inference. Original offset spelling is preserved.
      - `zodiac` 'tropical' | 'sidereal'
      - `ayanamsa` 'lahiri' | 'raman' | 'krishnamurti' | 'fagan_bradley' | 'yukteshwar' | 'sassanian' | 'true_chitra' | 'true_revati' | 'true_pushya' | 'galactic_center_0_sagittarius' | 'galactic_alignment_mardyks'
      - `house_system` 'equal' | 'whole_sign'
      - `method` 'true_solar_arc' | 'mean_naibod'
    - `result` object, required: Complete historical calculation adapter result. Times are explicit UT1 date records, never UTC strings; derived times may include fractional seconds and years outside the input range.
    - `metadata` object, required
      - `time_standard` 'UT1', required
      - `historical_accuracy_certified` unknown, required
      - `warnings` string[], required

## Other responses

- `400`: Invalid request, malformed JSON, out-of-range date/location, unknown model, invalid timezone or ambiguous/nonexistent clock-change time. Invalid attempts reaching quota reservation consume one unit.
- `401`: Missing, invalid, revoked API key or unavailable activated key owner. Dashboard cookies do not authenticate calculation routes.
- `403`: Origin not allowed by production CORS policy. Server-to-server requests can omit Origin.
- `404`: Wrong/case-variant/noncanonical or trailing-slash route; public paths have no version prefix.
- `413`: Request exceeds the body limit; gateway JSON is capped at 128 KiB. Edge failures may be HTML.
- `429`: Monthly quota exhausted, per-user two-request concurrency reached, or nginx rate/connection admission refused. Retry-After: 2 is sent for application per-user concurrency only, not a promise that monthly quota resets in two seconds.
- `500`: Bounded gateway/database/internal failure. An admitted attempt can still consume quota.
- `502`: Engine unavailable, unsuccessful internal server response or invalid upstream JSON. No engine internals are exposed.
- `503`: Four-request global calculation pool full (Retry-After: 2), maintenance or upstream service unavailable.
- `504`: Application engine timeout: 15 seconds normally; planetary events, house ingresses, aspect windows, event calendar, eclipse geometry, electional search, and event-rule search use 30 seconds; Nakshatra Timeline plus the explicitly enumerated readiness, robustness, location, uncertainty, and electional-audit family use 60 seconds. Timer includes response-body parsing; an admitted timeout consumes quota.

---

[API](https://skmtc.dev/cosmicephemeris/apis/cosmic-ephemeris-calculation-api.md) · [All operations](https://skmtc.dev/cosmicephemeris/apis/cosmic-ephemeris-calculation-api/llms.txt) · [OpenAPI document](https://skmtc.dev/cosmicephemeris/apis/cosmic-ephemeris-calculation-api/revisions/f041e924cea3?raw)