# Q66643591
**Wikidata**: [Q66643591](https://www.wikidata.org/wiki/Q66643591)  
**Source**: https://4ort.xyz/entity/q66643591


## References

1. SIMBAD
2. Spectral classification of visual binaries having primaries above the main sequence
3. Washington Double Star Catalog
4. The Tycho-2 catalogue of the 2.5 million brightest stars
5. Gaia Data Release 2