# Q77978924

> RR Lyrae variable star in the constellation Hercules

**Wikidata**: [Q77978924](https://www.wikidata.org/wiki/Q77978924)  
**Source**: https://4ort.xyz/entity/q77978924


## References

1. SIMBAD
2. Probing the outer galactic halo with RR Lyrae from the Catalina surveys
3. The SDSS Photometric Catalog, Release 7
4. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
5. Gaia Data Release 2
6. 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