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 "api": "https://zodiacs.org/api/v1/",
 "playground": "https://zodiacs.org/developers/playground/",
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   "id": "chart.utc",
   "endpoint": "chart",
   "name": "utc",
   "summary": "A UTC instant at Greenwich, Placidus houses",
   "body": {
    "utc": "2000-01-01T12:00:00Z",
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    "longitude": -0.0015,
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       "degree": 14.80613458959624
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       "body": "Neptune",
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       "speed": 0.03557004143317499,
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     "instant": "2000-01-01T12:00:00.000Z",
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  {
   "id": "chart.local",
   "endpoint": "chart",
   "name": "local",
   "summary": "Local civil time in an IANA zone, whole-sign houses",
   "body": {
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     "date": "1990-06-15",
     "time": "14:30",
     "zone": "Europe/Paris"
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    "latitude": 48.8566,
    "longitude": 2.3522,
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   "status": 200,
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   "id": "positions.two",
   "endpoint": "positions",
   "name": "two",
   "summary": "Three bodies at two instants",
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  {
   "id": "time.julian",
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   "body": {
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     "date": "1917-10-25",
     "time": "12:00",
     "zone": "Europe/Moscow"
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    "calendar": "julian",
    "country": "RU"
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     "adoption": {
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      "firstGregorian": "1918-02-14",
      "lastJulian": "1918-01-31",
      "sources": [
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     "calendarNote": null,
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  {
   "id": "time.atlas",
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   "body": {
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     "zone": "Europe/Paris"
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    "atlasPlace": "fr-strasbourg"
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          "title": "Letzte Telegramme: WTB Berlin, 7. April. Amtlich (Verordnung des Bundesrats über die Sommerzeit)",
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          "url": "https://gallica.bnf.fr/ark:/12148/bpt6k9429782d/f13.item",
          "locator": "Gallica view 13, col. 2",
          "gloss": "By order of the Bundesrat, every clock in the Reich went from 23:00 on 30 April 1916 to midnight, and back from 01:00 to midnight at the end of 30 September."
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       "sha256": "4aa79e4effee53fc4029ffe5f6ebe97937282ebcdf386d5d2da91ce84142f957",
       "dataForm": "main+backzone",
       "appliesBefore": "1970-01-02"
      },
      "runtimeTzdb": "2026c"
     },
     "search": {
      "solver": "engine-longitude-crossings",
      "stepDays": {
       "default": 5,
       "moon": 1,
       "elongation": 1
      },
      "bisections": 24,
      "samples": 26,
      "maxSamples": 1000,
      "window": "start-exclusive-end-inclusive",
      "completeness": "tested-not-proven"
     }
    },
    "backend": {
     "name": "@zodiacs/engine",
     "version": "1.0.0",
     "ephemeris": {
      "name": "astronomy-engine",
      "version": "2.1.19"
     }
    },
    "cite": {
     "url": "https://zodiacs.org/developers/compute/#sky-fact",
     "receipt": "sha256:ea86f4751db3f355fa4e2e4d03a565774cf2c6893366496972553b76bd6cd358",
     "engine": "@zodiacs/engine",
     "version": "1.0.0"
    }
   }
  },
  {
   "id": "sky-fact.phase",
   "endpoint": "sky-fact",
   "name": "phase",
   "summary": "Is there a full moon on a date, in every zone?",
   "body": {
    "kind": "phase",
    "phase": "full",
    "date": "2026-10-26"
   },
   "status": 200,
   "answer": {
    "schema": "zodiacs.compute-api.sky-fact.v1",
    "result": {
     "answer": "depends",
     "basis": "any-zone-day",
     "fact": {
      "kind": "phase",
      "phase": "full",
      "date": "2026-10-26",
      "zone": null
     },
     "instant": null,
     "window": {
      "from": "2026-10-25T10:00:00.000Z",
      "to": "2026-10-27T12:00:00.000Z"
     },
     "zone": null,
     "facts": {
      "lunations": [
       {
        "at": "2026-10-26T04:11:44.971Z",
        "lon": 32.76151344913791,
        "sign": "taurus",
        "degree": 2.761513449137908
       }
      ],
      "flags": []
     }
    },
    "receipt": {
     "schema": "zodiacs.compute-receipt.v1",
     "endpoint": "sky-fact",
     "engine": {
      "name": "@zodiacs/engine",
      "version": "1.0.0",
      "ephemeris": {
       "name": "astronomy-engine",
       "version": "2.1.19"
      }
     },
     "conventions": {
      "angles": "gast-and-true-obliquity",
      "aspects": "major-aspects;sun-moon-eight-planets;no-nodes;applying-instantaneous-orb-rate",
      "calendar": "proleptic-gregorian",
      "deltaT": "tt-minus-ut1;value-in-result",
      "localTime": "tzdb-shards-before-1970;host-intl-from-1970;flags-from-transition-record",
      "longitudeUnit": "degrees-[0,360)",
      "moonNodes": "instantaneous-geocentric-moon-orbit-plane",
      "moonPosition": "astronomy-engine-geo-moon;no-light-time;no-aberration",
      "nutation": "iau2000b;equation-of-equinoxes-with-two-complementary-terms",
      "planetPositions": "aberrated-geocentric-ecliptic-of-date;no-deflection",
      "speed": "degrees-per-day;central-difference-plus-minus-0.001-day;nodes-plus-minus-0.25-day",
      "timeScale": "tt-from-leap-seconds-and-ut1-from-iers-1972-to-table-end;delta-t-model-otherwise;in-result",
      "zodiac": "tropical"
     },
     "coverage": {
      "angleExclusions": "exact-geographic-poles-and-ecliptic-horizon-coincidence",
      "assessment": "finite-reference-cases-only",
      "broadDateRange": "not-certified",
      "inputSyntax": "not-an-astronomical-accuracy-guarantee"
     },
     "referenceSpan": {
      "from": "1800-01-01T00:00:00.000Z",
      "to": "2200-01-01T00:00:00.000Z"
     },
     "deltaT": [
      {
       "model": "iers-utc/1",
       "table": "2026-09-24",
       "tableDigest": "064d98b4a531053a"
      },
      {
       "model": "zodiacs-deltat/1",
       "table": "2026-09-24",
       "tableDigest": "6371988c510a1c6c"
      }
     ],
     "search": {
      "solver": "engine-longitude-crossings",
      "stepDays": {
       "default": 5,
       "moon": 1,
       "elongation": 1
      },
      "bisections": 24,
      "samples": 28,
      "maxSamples": 1000,
      "window": "start-exclusive-end-inclusive",
      "completeness": "tested-not-proven"
     }
    },
    "backend": {
     "name": "@zodiacs/engine",
     "version": "1.0.0",
     "ephemeris": {
      "name": "astronomy-engine",
      "version": "2.1.19"
     }
    },
    "cite": {
     "url": "https://zodiacs.org/developers/compute/#sky-fact",
     "receipt": "sha256:d6bf32e043b5a792cb1c7410592b8c24a443b6749d6fa89073730c3677d901db",
     "engine": "@zodiacs/engine",
     "version": "1.0.0"
    }
   }
  },
  {
   "id": "sky-fact.sign",
   "endpoint": "sky-fact",
   "name": "sign",
   "summary": "Is the Moon in Aries at an instant?",
   "body": {
    "kind": "sign",
    "body": "Moon",
    "sign": "aries",
    "instant": "2026-09-29T12:00:00Z"
   },
   "status": 200,
   "answer": {
    "schema": "zodiacs.compute-api.sky-fact.v1",
    "result": {
     "answer": "false",
     "basis": "instant",
     "fact": {
      "kind": "sign",
      "body": "Moon",
      "sign": "aries",
      "instant": "2026-09-29T12:00:00.000Z",
      "date": null,
      "zone": null
     },
     "instant": "2026-09-29T12:00:00.000Z",
     "window": null,
     "zone": null,
     "facts": {
      "lon": 42.542105382281534,
      "sign": "taurus",
      "degree": 12.542105382281534,
      "speed": 14.176528919762177,
      "retrograde": false,
      "deltaT": {
       "seconds": 69.20533325195312,
       "sigma": 0.0012697,
       "model": "iers-utc/1",
       "table": "2026-09-24",
       "tableDigest": "064d98b4a531053a",
       "segment": "predicted"
      },
      "timeScale": {
       "input": "utc",
       "basis": "iers",
       "ut1MinusUtc": {
        "seconds": -0.02133333333333809,
        "sigma": 0.0012697,
        "source": "predicted"
       },
       "leapSeconds": {
        "taiMinusUtc": 37,
        "listed": true
       }
      },
      "boundaryMarginArcsec": 45151.57937621352,
      "flags": []
     }
    },
    "receipt": {
     "schema": "zodiacs.compute-receipt.v1",
     "endpoint": "sky-fact",
     "engine": {
      "name": "@zodiacs/engine",
      "version": "1.0.0",
      "ephemeris": {
       "name": "astronomy-engine",
       "version": "2.1.19"
      }
     },
     "conventions": {
      "angles": "gast-and-true-obliquity",
      "aspects": "major-aspects;sun-moon-eight-planets;no-nodes;applying-instantaneous-orb-rate",
      "calendar": "proleptic-gregorian",
      "deltaT": "tt-minus-ut1;value-in-result",
      "localTime": "tzdb-shards-before-1970;host-intl-from-1970;flags-from-transition-record",
      "longitudeUnit": "degrees-[0,360)",
      "moonNodes": "instantaneous-geocentric-moon-orbit-plane",
      "moonPosition": "astronomy-engine-geo-moon;no-light-time;no-aberration",
      "nutation": "iau2000b;equation-of-equinoxes-with-two-complementary-terms",
      "planetPositions": "aberrated-geocentric-ecliptic-of-date;no-deflection",
      "speed": "degrees-per-day;central-difference-plus-minus-0.001-day;nodes-plus-minus-0.25-day",
      "timeScale": "tt-from-leap-seconds-and-ut1-from-iers-1972-to-table-end;delta-t-model-otherwise;in-result",
      "zodiac": "tropical"
     },
     "coverage": {
      "angleExclusions": "exact-geographic-poles-and-ecliptic-horizon-coincidence",
      "assessment": "finite-reference-cases-only",
      "broadDateRange": "not-certified",
      "inputSyntax": "not-an-astronomical-accuracy-guarantee"
     },
     "referenceSpan": {
      "from": "1800-01-01T00:00:00.000Z",
      "to": "2200-01-01T00:00:00.000Z"
     },
     "deltaT": [
      {
       "model": "iers-utc/1",
       "table": "2026-09-24",
       "tableDigest": "064d98b4a531053a"
      },
      {
       "model": "zodiacs-deltat/1",
       "table": "2026-09-24",
       "tableDigest": "6371988c510a1c6c"
      }
     ]
    },
    "backend": {
     "name": "@zodiacs/engine",
     "version": "1.0.0",
     "ephemeris": {
      "name": "astronomy-engine",
      "version": "2.1.19"
     }
    },
    "cite": {
     "url": "https://zodiacs.org/developers/compute/#sky-fact",
     "receipt": "sha256:8c0112fb50b859f7020b1ae4cb2d96db2ee6a26e92111a4e9274536c598978c4",
     "engine": "@zodiacs/engine",
     "version": "1.0.0"
    }
   }
  },
  {
   "id": "sky-fact.aspect",
   "endpoint": "sky-fact",
   "name": "aspect",
   "summary": "Is the Moon trine Saturn on a date in a zone? The aspect begins that morning.",
   "body": {
    "kind": "aspect",
    "body": "Moon",
    "other": "Saturn",
    "aspect": "trine",
    "date": "2026-10-14",
    "zone": "Europe/London"
   },
   "status": 200,
   "answer": {
    "schema": "zodiacs.compute-api.sky-fact.v1",
    "result": {
     "answer": "depends",
     "basis": "local-day",
     "fact": {
      "kind": "aspect",
      "body": "Moon",
      "other": "Saturn",
      "aspect": "trine",
      "instant": null,
      "date": "2026-10-14",
      "zone": "Europe/London"
     },
     "instant": null,
     "window": {
      "from": "2026-10-13T23:00:00.000Z",
      "to": "2026-10-14T23:00:00.000Z"
     },
     "zone": {
      "start": {
       "utc": "2026-10-13T23:00:00.000Z",
       "offsetMinutes": 60,
       "flags": [],
       "localMeanTime": null,
       "zoneHistory": "runtime",
       "zoneUncertain": false
      },
      "end": {
       "utc": "2026-10-14T23:00:00.000Z",
       "offsetMinutes": 60,
       "flags": [],
       "localMeanTime": null,
       "zoneHistory": "runtime",
       "zoneUncertain": false
      }
     },
     "facts": {
      "atStart": {
       "body": {
        "lon": 238.98599167835278,
        "sign": "scorpio",
        "degree": 28.985991678352775,
        "speed": 12.235855075203972,
        "retrograde": false
       },
       "other": {
        "lon": 10.562290945775885,
        "sign": "aries",
        "degree": 10.562290945775885,
        "speed": -0.07678121247067793,
        "retrograde": true
       },
       "separation": 131.5762992674231,
       "orb": 11.57629926742311,
       "motion": "applying"
      },
      "atEnd": {
       "body": {
        "lon": 251.12301634306226,
        "sign": "sagittarius",
        "degree": 11.123016343062318,
        "speed": 12.045457945660587,
        "retrograde": false
       },
       "other": {
        "lon": 10.485726779787512,
        "sign": "aries",
        "degree": 10.485726779787512,
        "speed": -0.07634044501969584,
        "retrograde": true
       },
       "separation": 119.36271043672525,
       "orb": 0.6372895632747486,
       "motion": "separating"
      },
      "allowedOrb": 8,
      "changes": [
       {
        "at": "2026-10-14T05:59:17.308Z",
        "holds": true
       }
      ],
      "exact": [
       {
        "at": "2026-10-14T21:44:19.280Z",
        "body": {
         "lon": 250.48973980064778,
         "sign": "sagittarius",
         "degree": 10.48973980064784
        },
        "other": {
         "lon": 10.489739457947962,
         "sign": "aries",
         "degree": 10.489739457947962
        }
       }
      ],
      "flags": []
     }
    },
    "receipt": {
     "schema": "zodiacs.compute-receipt.v1",
     "endpoint": "sky-fact",
     "engine": {
      "name": "@zodiacs/engine",
      "version": "1.0.0",
      "ephemeris": {
       "name": "astronomy-engine",
       "version": "2.1.19"
      }
     },
     "conventions": {
      "angles": "gast-and-true-obliquity",
      "aspects": "major-aspects;sun-moon-eight-planets;no-nodes;applying-instantaneous-orb-rate",
      "calendar": "proleptic-gregorian",
      "deltaT": "tt-minus-ut1;value-in-result",
      "localTime": "tzdb-shards-before-1970;host-intl-from-1970;flags-from-transition-record",
      "longitudeUnit": "degrees-[0,360)",
      "moonNodes": "instantaneous-geocentric-moon-orbit-plane",
      "moonPosition": "astronomy-engine-geo-moon;no-light-time;no-aberration",
      "nutation": "iau2000b;equation-of-equinoxes-with-two-complementary-terms",
      "planetPositions": "aberrated-geocentric-ecliptic-of-date;no-deflection",
      "speed": "degrees-per-day;central-difference-plus-minus-0.001-day;nodes-plus-minus-0.25-day",
      "timeScale": "tt-from-leap-seconds-and-ut1-from-iers-1972-to-table-end;delta-t-model-otherwise;in-result",
      "zodiac": "tropical"
     },
     "coverage": {
      "angleExclusions": "exact-geographic-poles-and-ecliptic-horizon-coincidence",
      "assessment": "finite-reference-cases-only",
      "broadDateRange": "not-certified",
      "inputSyntax": "not-an-astronomical-accuracy-guarantee"
     },
     "referenceSpan": {
      "from": "1800-01-01T00:00:00.000Z",
      "to": "2200-01-01T00:00:00.000Z"
     },
     "deltaT": [
      {
       "model": "iers-utc/1",
       "table": "2026-09-24",
       "tableDigest": "064d98b4a531053a"
      },
      {
       "model": "zodiacs-deltat/1",
       "table": "2026-09-24",
       "tableDigest": "6371988c510a1c6c"
      }
     ],
     "timeResolution": {
      "resolver": "@zodiacs/engine/geo",
      "policy": {
       "fold": "earlier",
       "gap": "shift-forward"
      },
      "pinnedTzdb": {
       "release": "2025c",
       "sha256": "4aa79e4effee53fc4029ffe5f6ebe97937282ebcdf386d5d2da91ce84142f957",
       "dataForm": "main+backzone",
       "appliesBefore": "1970-01-02"
      },
      "runtimeTzdb": "2026c"
     },
     "search": {
      "solver": "engine-longitude-crossings",
      "stepDays": {
       "default": 5,
       "moon": 1,
       "elongation": 1
      },
      "bisections": 24,
      "samples": 62,
      "maxSamples": 1000,
      "window": "start-exclusive-end-inclusive",
      "completeness": "tested-not-proven"
     }
    },
    "backend": {
     "name": "@zodiacs/engine",
     "version": "1.0.0",
     "ephemeris": {
      "name": "astronomy-engine",
      "version": "2.1.19"
     }
    },
    "cite": {
     "url": "https://zodiacs.org/developers/compute/#sky-fact",
     "receipt": "sha256:51a86f2bfa27f2a36df3665eea3da9bacf21829d0c270eb064045640aa3353ac",
     "engine": "@zodiacs/engine",
     "version": "1.0.0"
    }
   }
  }
 ],
 "refusals": [
  {
   "id": "chart.invalid-request",
   "endpoint": "chart",
   "name": "invalid-request",
   "summary": "Refused: a latitude at a pole",
   "body": {
    "utc": "2000-01-01T12:00:00Z",
    "latitude": 90,
    "longitude": 0
   },
   "status": 400,
   "answer": {
    "error": {
     "code": "invalid-request",
     "message": "Must be a number greater than -90 and less than 90; the engine does not compute angles at the poles.",
     "pointer": "/latitude"
    }
   }
  },
  {
   "id": "chart.invalid-json",
   "endpoint": "chart",
   "name": "invalid-json",
   "summary": "Refused: a body that is not JSON",
   "body": "{\"utc\": ",
   "status": 400,
   "answer": {
    "error": {
     "code": "invalid-json",
     "message": "The body is not valid JSON in UTF-8."
    }
   }
  },
  {
   "id": "events.budget-exhausted",
   "endpoint": "events",
   "name": "budget-exhausted",
   "summary": "Refused: an events window longer than 92 days",
   "body": {
    "from": "2026-01-01T00:00:00Z",
    "to": "2026-07-01T00:00:00Z"
   },
   "status": 422,
   "answer": {
    "error": {
     "code": "budget-exhausted",
     "message": "An events window is at most 92 days long.",
     "limit": "events.windowDays",
     "max": 92
    }
   }
  }
 ]
}