# 18 Leonis

> star in the constellation Leo

**Wikidata**: [Q15939950](https://www.wikidata.org/wiki/Q15939950)  
**Source**: https://4ort.xyz/entity/18-leonis


## References

1. SIMBAD
2. The Tycho-2 catalogue of the 2.5 million brightest stars
3. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
4. Gaia Early Data Release 3
5. APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South
6. Determining ages of APOGEE giants with known distances
7. Precise radial velocities of giant stars. III. Spectroscopic stellar parameters
8. Gaia Data Release 2