# W Hydrae

> variable star in the constellation Hydra

**Wikidata**: [Q2568924](https://www.wikidata.org/wiki/Q2568924)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/W_Hydrae)  
**Source**: https://4ort.xyz/entity/w-hydrae


## References

1. General Catalogue of Variable Stars
2. SIMBAD
3. Revised catalog of spectra of Mira variables of types Me and Se
4. Washington Double Star Catalog
5. Freebase Data Dumps. 2013
6. Determination of pulsation periods and other parameters of 2875 stars classified as Mira in the All Sky Automated Survey (ASAS)
7. The Tycho-2 catalogue of the 2.5 million brightest stars
8. Catalogue of Stellar Photometry in Johnson's 11-color system
9. Gaia Early Data Release 3
10. Gaia Data Release 2
11. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system