@elite-dangerous-almanac/core / astro / EccentricityClass

EccentricityClass = "circular" | "nearly-circular" | "eccentric" | "highly-eccentric"

Defined in: src/astro/body-orbit.ts:58

How round an orbit is, in the four bands the Canonn tooling reports.

• circular — eccentricity exactly 0.
• nearly-circular — below 0.4.
• eccentric — below 0.8.
• highly-eccentric — 0.8 and above.

The bands are descriptive rather than physical: nothing changes at 0.4. They exist so that "how unusual is this orbit" has one answer everywhere instead of a different threshold per caller.