# RR Herculis

> carbon star in the constellation Hercules

**Wikidata**: [Q74738137](https://www.wikidata.org/wiki/Q74738137)  
**Source**: https://4ort.xyz/entity/rr-herculis


## References

1. SIMBAD
2. VizieR
3. Catalogue of stellar spectral classifications
4. General Catalogue of Variable Stars, 3rd ed.
5. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+, 2007-2017)
6. The Tycho-2 catalogue of the 2.5 million brightest stars
7. Catalogue of Stellar Photometry in Johnson's 11-color system
8. Gaia Early Data Release 3
9. APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South
10. Gaia Data Release 2