# ES Hydrae

> RR Lyrae variable star in the constellation Hydra

**Wikidata**: [Q86687997](https://www.wikidata.org/wiki/Q86687997)  
**Source**: https://4ort.xyz/entity/es-hydrae


## References

1. SIMBAD
2. Gaia Data Release 3
3. Gaia Data Release 2
4. Machine-learned Identification of RR Lyrae Stars from Sparse, Multi-band Data: The PS1 Sample
5. Discovery of ~9,000 new RR Lyrae in the southern Catalina surveys
6. The Pan-STARRS release 1 (PS1) Survey - DR1
7. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
8. Gaia Early Data Release 3