# IV Hydrae

> RR Lyrae variable star in the constellation Hydra

**Wikidata**: [Q90072184](https://www.wikidata.org/wiki/Q90072184)  
**Source**: https://4ort.xyz/entity/iv-hydrae


## References

1. SIMBAD
2. Gaia Data Release 3
3. Gaia Data Release 2
4. Machine-learned Identification of RR Lyrae Stars from Sparse, Multi-band Data: The PS1 Sample
5. Discovery of ~9,000 new RR Lyrae in the southern Catalina surveys
6. Probing the outer galactic halo with RR Lyrae from the Catalina surveys
7. The Pan-STARRS release 1 (PS1) Survey - DR1
8. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
9. The University of New South Wales Extrasolar Planet Search: a catalogue of variable stars from fields observed between 2004 and 2007
10. Gaia Early Data Release 3
11. Source