Eccentricity affects distance to the sun(s) which greatly affects temperature. For Earth, it's the axial tilt that determines most seasonal temperature variation; for a world in a rather eccentric orbit, the distance from the sun changes enough for that to be the most important factor in determining temperature, habitability, and related issues.I like these forms. One thing I ask you to consider about every entry - how does that effect the player characters and the adventure?
Sure, listing Eccentricity is cool, but so what? is there something explaining what a high eccentricity means to the characters? If not, is it really worth including? THANKS
So as I said earlier, there are 6 orbital parameters, only two are important to the world creation (hence players), though you need all of them to actually determine position at a point in time in three dimensional space. I will add very short procedures for the other four in a text box (those blue things), because depending on how you map your systems, you could care, and they would affect transit time (and requiring programming, complicated equations or hours of tedious work by hand to compute solutions, which is why they're not on the main from).