# FF Hydrae

> long-period variable star in the constellation Hydra

**Wikidata**: [Q77372508](https://www.wikidata.org/wiki/Q77372508)  
**Source**: https://4ort.xyz/entity/ff-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. The Tycho-2 catalogue of the 2.5 million brightest stars
6. Gaia Early Data Release 3
7. Gaia Data Release 3
8. Gaia Data Release 2