# V515 Hydrae

> RR Lyrae variable star in the constellation Hydra

**Wikidata**: [Q91051126](https://www.wikidata.org/wiki/Q91051126)  
**Source**: https://4ort.xyz/entity/v515-hydrae


## References

1. SIMBAD
2. Gaia Data Release 3
3. The Catalina surveys periodic variable star catalog
4. The QUEST RR Lyrae Survey. I. The First Catalog
5. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
6. The SDSS Photometric Catalog, Release 7
7. The seventh data release of the Sloan Digital Sky Survey
8. The SDSS Photometric Catalog, Release 9
9. The ninth data release of the Sloan Digital Sky Survey: first spectroscopic data from the SDSS-III baryon oscillation spectroscopic survey
10. Gaia Early Data Release 3
11. The Milky Way's circular velocity curve to 60 kpc and an estimate of the dark matter halo mass from the kinematics of ~2400 SDSS blue horizontal-branch stars
12. Gaia Data Release 2