The eccentricity of an orbit is not measured in days. The excentricity is a numeric value between 0 (for a perfect circle) to 1 (for an extremely prolonged elipse).
The Earth's axis completes one full cycle of precession approximately every 26,000 years. At the same time, the elliptical orbit rotates, more slowly, leading to a 21,000-year cycle between the...
The eccentricity is 0.04839266 which means that the difference between its closest distance to the Sun and its farthest distance is a bit less than 5% of the total average distance (this is much more...
The eccentricity of earth's orbit is 0.016710219. This is a measure of how elliptical the orbit is. Earth's orbit is not a perfect circle, but the eccentricity shows that it is not a very pronounced...