Calculadora de Excentricidade Orbital
Calcule a excentricidade de uma órbita elíptica com base nos parâmetros orbitais.
km
km
Eccentricity
0.016711
Semieixo Maior149,600,000 km
Eccentricity vs Periapsis Distance
Formula
Orbital Eccentricity
Eccentricity describes how elongated an orbit is (0 = circle, approaching 1 = very elongated ellipse).
Formula
e = (r_a - r_p) / (r_a + r_p)
Semi-major axis: a = (r_a + r_p) / 2
Exemplo Resolvido
Earth: perihelion 147.1M km, aphelion 152.1M km.
- 01e = (152.1M - 147.1M) / (152.1M + 147.1M)
- 02e = 5M / 299.2M ≈ 0.01672
- 03a = 299.2M / 2 = 149.6M km
Perguntas Frequentes
What eccentricity is a circle?
A perfect circle has e = 0. Most planets have e < 0.1.
What does e = 1 mean?
Eccentricity of 1 is a parabolic escape trajectory. Above 1 is hyperbolic.
Which planet is most eccentric?
Mercury at about 0.2056 among the eight planets.