# DP Hydrae

> RR Lyrae variable star in the constellation Hydra

**Wikidata**: [Q90646237](https://www.wikidata.org/wiki/Q90646237)  
**Source**: https://4ort.xyz/entity/dp-hydrae


## References

1. SIMBAD
2. Gaia Data Release 3
3. Gaia Data Release 2
4. Discovery of ~9,000 new RR Lyrae in the southern Catalina surveys
5. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
6. Gaia Early Data Release 3
7. On the Use of Field RR Lyrae as Galactic Probes. III. The α-element Abundances
8. On the Use of Field RR Lyrae as Galactic Probes. II. A New ΔS Calibration to Estimate Their Metallicity