# 31 Leonis

> binary star system in the constellation Leo

**Wikidata**: [Q4634782](https://www.wikidata.org/wiki/Q4634782)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/31_Leonis)  
**Source**: https://4ort.xyz/entity/31-leonis


## References

1. A catalogue of multiplicity among bright stellar systems
2. SIMBAD
3. The Perkins catalog of revised MK types for the cooler stars
4. Gaia Data Release 3
5. Freebase Data Dumps
6. Catalogue of Stellar Photometry in Johnson's 11-color system
7. Gaia Early Data Release 3
8. Rotational and radial velocities for a sample of 761 Hipparcos giants and the role of binarity
9. High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances
10. Gaia FGK benchmark stars: Fundamental Teff and log g of the third version