# AT Andromedae

> RR Lyrae variable star in the constellation Andromeda

**Wikidata**: [Q91128748](https://www.wikidata.org/wiki/Q91128748)  
**Source**: https://4ort.xyz/entity/at-andromedae


## 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. General Catalogue of Variable Stars, 3rd ed.
4. Mid-infrared period-luminosity relations of RR Lyrae stars derived from the AllWISE Data Release
5. Gaia Data Release 2
6. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
7. The Tycho-2 catalogue of the 2.5 million brightest stars
8. Gaia Early Data Release 3
9. The luminosities and distance scales of type II Cepheid and RR Lyrae variables