# 81 Leonis

> star in the constellation Leo

**Wikidata**: [Q15939681](https://www.wikidata.org/wiki/Q15939681)  
**Source**: https://4ort.xyz/entity/81-leonis


## References

1. SIMBAD
2. The early F-type stars: refined classification, confrontation with Stroemgren photometry, and the effects of rotation
3. The Tycho-2 catalogue of the 2.5 million brightest stars
4. Q66682318
5. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
6. Gaia Early Data Release 3
7. Gaia Data Release 2
8. Lithium abundance patterns of late-F stars: an in-depth analysis of the lithium desert
9. Ca II HK emission in rapidly rotating stars