# RV Hydrae

> long-period variable star in the constellation Hydra

**Wikidata**: [Q66630598](https://www.wikidata.org/wiki/Q66630598)  
**Source**: https://4ort.xyz/entity/rv-hydrae


## References

1. SIMBAD
2. Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5
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. Gaia Data Release 3
7. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
8. Gaia Data Release 2