G = 6.673e-20; %km^3/km/s^2
R_earth = 6378.1363; %km
mu_earth = 398600.4415; %km^3/s^2
mass_earth = 5.9742e24; %kg
w_earth = 7.2921158553e-5; %rad/s

a_earth = 149598023; %km
e_earth = 0.016708617;
e_long_perh = 102.93734808; %deg
e_per = 0.99997862; %yrs

R_moon = 1738.0; %km
mu_moon = 4902.799; %km^3/s^2
mass_moon = 7.3483e22; %kg

au = 149597870; %km
mu_sun = 1.32712428e11; %km^3/s^2

a_mars = 1.52367934*au; %km
R_mars = 3397; %km
mu_mars = 4.305e4; %km^3/s^2


a_venus = 108208601; %km