@observerly/astrometry/dist/optics.js

observerly's lightweight, zero-dependency, type safe astrometry library written in Typescript for calculating the position of celestial objects in the sky.

import { e } from "./utilities-BM-rBPno.js";
function n(r, a) {
  if (r < 0)
    throw new Error("Invalid focal ratio as aperture is negative");
  if (a < 0)
    throw new Error("Invalid focal ratio as focal length is negative");
  return `f/${a / r}`;
}
function f(r, a, i) {
  if (r < 0)
    throw new Error("Invalid focal ratio as focal length is negative");
  if (a < 0)
    throw new Error("Invalid focal ratio as pixel size is negative");
  if (i.x < 0 || i.y < 0)
    throw new Error("Invalid focal ratio as resolution is negative");
  const o = e(a / r);
  return {
    x: i.x * o,
    y: i.y * o
  };
}
export {
  f as getFieldOfView,
  n as getFocalRatio
};
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