# 21 Monocerotis

> star in the constellation Monoceros

**Wikidata**: [Q3598106](https://www.wikidata.org/wiki/Q3598106)  
**Source**: https://4ort.xyz/entity/21-monocerotis


## References

1. SIMBAD
2. Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5
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. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
7. Carbon and oxygen abundances across the Hertzsprung gap
8. Ca II HK emission in rapidly rotating stars
9. Gaia Data Release 2