# Launch Elements

I already know about the six Keplerian Elements that are fundamental to a planet's orbit around the Sun, and for a few weeks now, I thought I'd got it down. Then, I wanted to have some fun, and test out an Orbital Mechanics Simulator (https://orbitalmechanics.info/) that I'd found on the web. Then, if you click the button that says "Add Launch", it gives you slides for three launch elements. I knew (at least I thought I knew) what Ω meant, I believe it is the argument of latitude of the satellite, but then I see two other angles, ψ and λ. I google up "Three Launch Elements", but I only get links about making a product succeed. Then, I be more specific, and I add satellite to the front, and the first article looked relevant, but I get a resource on a book that isn't what I want to know about, at least based on the title of it. Then, I go, start over, and google "Omega, Psi, Lambda", and, as it turns out, Google gave me a bunch of photos of a club called Ω,Ψ,Φ (Notice: the Club Name has Φ, not Λ). What do these launch elements mean, and how do you calculate them?

• "I google up "Three Launch Elements", but I only get links about making a product succeed." lol, +1 for that alone Apr 27 at 17:36
• Yeah. Sometimes Google fails you, and this is definitely one of those times. Apr 27 at 17:41

• $$\phi$$ is the latitude of the launch site.
• $$\lambda$$ is the longitude of the launch site.