# SX Ursae Majoris

> RR Lyrae variable star in the constellation Ursa Major

**Wikidata**: [Q77909739](https://www.wikidata.org/wiki/Q77909739)  
**Source**: https://4ort.xyz/entity/sx-ursae-majoris


## 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. Mid-infrared period-luminosity relations of RR Lyrae stars derived from the AllWISE Data Release
4. General Catalogue of Variable Stars, 3rd ed.
5. Gaia Data Release 2
6. The Tycho-2 catalogue of the 2.5 million brightest stars
7. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
8. Gaia Early Data Release 3
9. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
10. On the Use of Field RR Lyrae as Galactic Probes. III. The α-element Abundances
11. On the Use of Field RR Lyrae as Galactic Probes. II. A New ΔS Calibration to Estimate Their Metallicity