Function astro::orbit::elliptic::length

pub fn length(a: f64, b: f64) -> f64

Computes the approximate length of an ellipse

Returns

• approx_length: An approximate value for the length of the ellipse (same unit as that of a and b)

The error in approx_length is:

• less than 0.001% if e < 0.88
• less than 0.01% if e < 0.95
• 1% if e = 0.9997
• 3% if e = 1

Arguments

• a: Semimajor axis of the ellipse (same unit as that of b)
• b: Semiminor axis of the ellipse (same unit as that of a)