OrbitalElementsJS

This is a simple javascript library which allows you to solve for the orbital elements from the position and velocity or vice versa.

Demo

Library Usage

Install

npm i https://github.com/ChooseDews/OrbitalElementsJS

Usage

const OrbitElement = require('./orbitalelements');

Get position & velocity from elements:

let μ = 1; //GM = μ = 398600 for earth 
let Ω = OrbitElement.d2Rad(194);
let i = OrbitElement.d2Rad(39);
let ω = OrbitElement.d2Rad(85);

let a = 15307.548;
let e = 0.7;
let ν = OrbitElement.d2Rad(48);

let values = OrbitElement.computeECI(ω, i, Ω, a, e, ν, μ)
console.log(values);

Get elements from position & velocity:

let μ = 1;
let r_p = [4249.24395473, -2054.84062287, 2446.99585787];
let v_p = [0.01436795, 0.00921151, -0.00442301];
let elements = OrbitElement.getElements(r_p,v_p, μ);
console.log(elements)