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GET /v1/approaches

Upcoming (or past) close approaches

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10 free calls per day — no sign-up, no API key. Goes through the oanor gateway.

Custom headers (optional)
api.oanor.com/closeapproach-api

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Code snippets

curl "https://api.oanor.com/closeapproach-api/v1/approaches" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/closeapproach-api/v1/approaches", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/closeapproach-api/v1/approaches");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);
import requests
requests.get(
    "https://api.oanor.com/closeapproach-api/v1/approaches",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "count": 23,
        "total": 23,
        "approaches": [
            {
                "date": "2026-May-31 00:54",
                "object": "2026 KJ2",
                "distance": {
                    "au": 0.044786,
                    "km": 6699907,
                    "lunar": 17.43
                },
                "fullname": "(2026 KJ2)",
                "estimated_diameter": {
                    "max_km": 0.041,
                    "min_km": 0.018
                },
                "absolute_magnitude_h": 25.807,
                "relative_velocity_km_s": 7.212
            },
            {
                "date": "2026-May-31 01:31",
                "object": "2026 KA3",
                "distance": {
                    "au": 0.024714,
                    "km": 3697202,
                    "lunar": 9.62
                },
                "fullname": "(2026 KA3)",
                "estimated_diameter": {
                    "max_km": 0.044,
                    "min_km": 0.02
                },
                "absolute_magnitude_h": 25.654,
                "relative_velocity_km_s": 9.333
            },
            {
                "date": "2026-Jun-01 03:26",
                "object": "2026 KV",
                "distance": {
                    "au": 0.02598,
                    "km": 3886503,
                    "lunar": 10.11
                },
                "fullname": "(2026 KV)",
                "estimated_diameter": {
                    "max_km": 0.045,
                    "min_km": 0.02
                },
                "absolute_magnitude_h": 25.611,
                "relative_velocity_km_s": 10.935
            },
            {
                "date": "2026-Jun-01 10:13",
                "object": "2026 JN",
                "distance": {
                    "au": 0.040903,
                    "km": 6119027,
                    "lunar": 15.92
                },
                "fullname": "(2026 JN)",
                "estimated_diameter": {
                    "max_km": 0.083,
                    "min_km": 0.037
                },
                "absolute_magnitude_h": 24.281,
                "relative_velocity_km_s": 7.77
            },
            {
                "date": "2026-Jun-01 11:35",
                "object": "2026 KO3",
                "distance": {
                    "au": 0.044234,
                    "km": 6617240,
                    "lunar": 17.21
                },
                "fullname": "(2026 KO3)",
                "estimated_diameter": {
                    "max_km": 0.076,
                    "min_km": 0.034
                },
                "absolute_magnitude_h": 24.468,
                "relative_velocity_km_s": 12.867
            },
            {
                "date": "2026-Jun-01 23:35",
                "object": "2026 KB1",
                "distance": {
                    "au": 0.026218,
                    "km": 3922085,
                    "lunar": 10.2
        
…