# RR Lyrae

> Star in the constellation Lyra

**Wikidata**: [Q370994](https://www.wikidata.org/wiki/Q370994)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/RR_Lyrae)  
**Source**: https://4ort.xyz/entity/rr-lyrae


## References

1. General Catalogue of Variable Stars
2. SIMBAD
3. VizieR
4. VizieR Online Data Catalog: Henry Draper Catalogue and Extension, published in Ann. Harvard Obs. 91-100 (1918-1925)
5. Freebase Data Dumps. 2013
6. Mid-infrared period-luminosity relations of RR Lyrae stars derived from the AllWISE Data Release
7. General Catalogue of Variable Stars, 3rd ed.
8. Catalogue of Stellar Photometry in Johnson's 11-color system
9. The USNO-B Catalog
10. Gaia Data Release 2
11. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
12. Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
13. Carbon and oxygen abundances across the Hertzsprung gap
14. A search for SX Phe stars among Kepler {delta} Scuti stars