Angular diameter

Code snippets

curl "https://api.oanor.com/angularsize-api/v1/angular-size" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/angularsize-api/v1/angular-size", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/angularsize-api/v1/angular-size");
curl_setopt($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/angularsize-api/v1/angular-size",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

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

{
    "data": {
        "note": "Angular diameter δ = 2·arctan(d/(2D)). For distant objects the small-angle approximation δ ≈ d/D (radians) is accurate to well under 1 %.",
        "inputs": {
            "size": 3474,
            "distance": 384400
        },
        "angular_size": {
            "degrees": 0.51780485,
            "radians": 0.009037399467,
            "arcminutes": 31.068291,
            "arcseconds": 1864.0975
        },
        "small_angle_approx_radians": 0.009037460978
    },
    "meta": {
        "timestamp": "2026-06-05T11:30:24.318Z",
        "request_id": "b3eee7ea-a3f2-4ab6-9356-51e026e1fa58"
    },
    "status": "ok",
    "message": "Angular size",
    "success": true
}