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{
  "description": "A close approach event where a near-Earth object passes near Earth.",
  "properties": {
    "date": {
      "description": "Close approach date (YYYY-MM-DD)",
      "type": "string"
    },
    "missDistanceKm": {
      "description": "Nominal miss distance in kilometers",
      "type": [
        "number",
        "null"
      ]
    },
    "missDistanceLunar": {
      "description": "Nominal miss distance in lunar distances (1 LD = 384,400 km)",
      "type": [
        "number",
        "null"
      ]
    },
    "objectId": {
      "description": "Identifier of the approaching object",
      "type": "string",
      "x-ref-type": "Object"
    },
    "orbitingBody": {
      "description": "The body being approached (typically Earth)",
      "type": "string"
    },
    "relativeVelocityKmPerSec": {
      "description": "Relative velocity at close approach in km/s",
      "type": [
        "number",
        "null"
      ]
    }
  },
  "required": [
    "objectId",
    "date",
    "orbitingBody"
  ],
  "title": "Close Approach",
  "type": "object"
}