# IO Hydrae

> long-period variable star in the constellation Hydra

**Wikidata**: [Q66531707](https://www.wikidata.org/wiki/Q66531707)  
**Source**: https://4ort.xyz/entity/io-hydrae


## References

1. SIMBAD
2. Source
3. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+, 2007-2017)
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. Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Radial velocities: The Wilson-Evans-Batten catalogue
8. The revision of the general catalogue of radial velocities
9. Gaia Data Release 2