# Q81663509

> long period variable

**Wikidata**: [Q81663509](https://www.wikidata.org/wiki/Q81663509)  
**Source**: https://4ort.xyz/entity/q81663509


## References

1. SIMBAD
2. Catalogue of two dimentional spectral types for the HD stars, Vol. 2
3. General Catalogue of Variable Stars, 3rd ed.
4. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+, 2007-2017)
5. The first INTEGRAL-OMC catalogue of optically variable sources
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. The Kinematics of Semi-Regular Red Variables in the Solar Neighbourhood
10. Gaia Data Release 2