# eccentricity vector

> in celestial mechanics, a dimensionless vector with direction pointing from apoapsis to periapsis

**Wikidata**: [Q2755244](https://www.wikidata.org/wiki/Q2755244)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Eccentricity_vector)  
**Source**: https://4ort.xyz/entity/eccentricity-vector


## References

1. Freebase Data Dumps. 2013