# Q81919539

> RR Lyrae variable star in the constellation Lynx

**Wikidata**: [Q81919539](https://www.wikidata.org/wiki/Q81919539)  
**Source**: https://4ort.xyz/entity/q81919539


## References

1. SIMBAD
2. Summary of delta-S metallicity measurements for bright RR Lyrae variables observed at Lick Observatory and KPNO between 1972 and 1987
3. Gaia Data Release 2
4. Mid-infrared period-luminosity relations of RR Lyrae stars derived from the AllWISE Data Release
5. General Catalogue of Variable Stars, 3rd ed.
6. Automated variable star classification using the Northern Sky Variability Survey
7. Catalogue of Stellar Photometry in Johnson's 11-color system
8. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
9. Gaia Early Data Release 3
10. APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South
11. The luminosities and distance scales of type II Cepheid and RR Lyrae variables