{
  "body": "2060 Chiron (1977 UB)",
  "provider": "NASA/JPL Solar System Dynamics \u2014 Horizons",
  "solution": "JPL#171",
  "solutionDate": "2026-06-05T06:09:00",
  "retrieved": "2026-09-23",
  "source": "https://ssd.jpl.nasa.gov/horizons/",
  "api": "https://ssd.jpl.nasa.gov/api/horizons.api",
  "documentation": "https://ssd-api.jpl.nasa.gov/doc/horizons.html",
  "query": {
    "format": "json",
    "COMMAND": "'2060;'",
    "EPHEM_TYPE": "'VECTORS'",
    "CENTER": "'500@0'",
    "START_TIME": "'1599-12-11'",
    "STOP_TIME": "'2401-03-01'",
    "STEP_SIZE": "'32d'",
    "REF_PLANE": "'FRAME'",
    "REF_SYSTEM": "'ICRF'",
    "OUT_UNITS": "'AU-D'",
    "VEC_TABLE": "'2'",
    "VEC_CORR": "'NONE'",
    "CSV_FORMAT": "'YES'",
    "CAL_TYPE": "'GREGORIAN'",
    "TIME_TYPE": "'TDB'"
  },
  "tableSource": {
    "path": "assets/licenses/sources/chiron-horizons-vectors.json.gz",
    "sha256": "26439b0b209dc5c4b1e9c70d12ecca72f0cb18cc00125022e754f6afe3132622",
    "uncompressedSha256": "fe5779990da2c00ee0c67f822b7046cd480fdaf658e0e68d586192a68f3406e6"
  },
  "runtimeTable": "assets/js/zaman-chiron-data.js",
  "generator": "tools/build-chiron-data.mjs",
  "coordinates": "Geometric barycentric ICRF xyz in au and velocity in au/day; TDB",
  "runtime": "Cubic Hermite interpolation, 64-day knots, rounded to 12 significant digits; local Astronomy Engine Earth state, light travel time, first-order aberration, precession/nutation and observer parallax. TT approximates TDB (<2 ms periodic difference).",
  "validation": "Every alternate 32-day source row is withheld as a midpoint regression sample. Further geocentric light-time/aberration validation is preserved separately. Test residuals are implementation comparisons, not physical orbit uncertainty.",
  "limitations": "No total Chiron orbit error bound is claimed. Orbit uncertainty grows away from observations; historical and distant-future results are model extrapolations. Uses existing modeled delta-T, no live IERS corrections, and no gravitational light-deflection correction. No Chiron magnitude/illumination model. No visitor location or date is sent to JPL.",
  "attribution": "Numerical ephemeris data computed by NASA/JPL Solar System Dynamics Group, Horizons. No NASA, JPL or Caltech endorsement is implied. Application code is GPL-2.0-only; no claim of authorship is made over JPL numerical data.",
  "validationSource": {
    "path": "assets/licenses/sources/chiron-horizons-validation.json",
    "sha256": "26aab4e98c700618ac6cde3603c3e6f18f0fc8dd2f5fc1f37d330c3ee617cfdb"
  },
  "supportedCivilDates": "1600-01-01 through 2400-12-31, with a full UTC day of padding at both boundaries for historical IANA zones and accepted fixed offsets below 24 hours",
  "supportedUtc": "1599-12-31T00:00:00Z inclusive through 2401-01-02T00:00:00Z exclusive",
  "validationResults": {
    "withheldMidpoints": 4572,
    "maximumMidpointEquivalentArcseconds": 0.00559,
    "independentGeocentricEpochs": 19,
    "maximumGeocentricAngularResidualArcseconds": 0.27176,
    "maximumGeocentricRangeResidualAU": 1.6531e-05,
    "meaning": "Numerical agreement with the pinned JPL orbit model on the tested samples only; not a physical accuracy guarantee."
  }
}