Celestial Body | Mass (Kg) | Orbital radius of the secondary | Hill Radius | Radius of the Gravitational Sphere of influence of the celestial object |
Sun | 1.9930 | 4.37ly | Of Sun w.r.t. P.Centauri is 2.87 ly | 2.87 ly |
Proxima Centauri | 2.44629 | 4.37ly | Of P.Centauri w.r.t. Sun is 1.5 ly | 1.5 ly |
Earth | 5.973624 | 1AU | Of Earth w.r.t. Sun 0.01 AU = 1,496,280 Km | Earth’s gravitational extent is 0.01 AU hence Moon is within Earth’s gravitational influence. |