# 9 Leonis

> star in the constellation Leo

**Wikidata**: [Q66491565](https://www.wikidata.org/wiki/Q66491565)  
**Source**: https://4ort.xyz/entity/9-leonis


## References

1. SIMBAD
2. MK classifications for F-and G-type stars. II
3. The Tycho-2 catalogue of the 2.5 million brightest stars
4. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
5. Gaia Early Data Release 3
6. Gaia Data Release 2
7. The Penn State - Torun Centre for Astronomy Planet Search stars. IV. Dwarfs and the complete sample