# Q77976571

> RR Lyrae variable star in the constellation Hercules

**Wikidata**: [Q77976571](https://www.wikidata.org/wiki/Q77976571)  
**Source**: https://4ort.xyz/entity/q77976571


## References

1. SIMBAD
2. Newly discovered RR Lyrae stars in the SDSS-Pan-STARRS1-Catalina footprint
3. The SDSS Photometric Catalog, Release 8
4. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
5. The Catalina surveys periodic variable star catalog
6. Gaia Data Release 2
7. The ninth data release of the Sloan Digital Sky Survey: first spectroscopic data from the SDSS-III baryon oscillation spectroscopic survey
8. 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
9. Exploring the variable sky with LINEAR. II. Halo structure and substructure traced by RR Lyrae stars to 30 kpc