# V564 Hydrae

> classical Cepheid variable star in the constellation Hydra

**Wikidata**: [Q93000356](https://www.wikidata.org/wiki/Q93000356)  
**Source**: https://4ort.xyz/entity/v564-hydrae


## References

1. SIMBAD
2. Gaia Data Release 3
3. Spectra of type II cepheid candidates and related stars
4. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
5. Photometry of type II Cepheid candidates from the northern part of the All Sky Automated Survey
6. Gaia Early Data Release 3
7. Gaia Data Release 2