# 1 Hydrae A

> star in the constellation Hydra

**Wikidata**: [Q10932323](https://www.wikidata.org/wiki/Q10932323)  
**Source**: https://4ort.xyz/entity/1-hydrae-a


## References

1. SIMBAD
2. MK classifications of spectroscopic binaries
3. Catalogue of Stellar Photometry in Johnson's 11-color system
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. Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants
8. The effective temperature scale of FGK stars. I. Determination of temperatures and angular diameters with the infrared flux method