# 55 Leonis

> star in the constellation Leo

**Wikidata**: [Q15939226](https://www.wikidata.org/wiki/Q15939226)  
**Source**: https://4ort.xyz/entity/55-leonis


## References

1. SIMBAD
2. Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5
3. Washington Double Star Catalog
4. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
5. Gaia Early Data Release 3
6. The Tycho double star catalogue
7. Gaia Data Release 2
8. SP_Ace: a new code to derive stellar parameters and elemental abundances
9. Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i
10. Validation of the new Hipparcos reduction