# Q66609649
**Wikidata**: [Q66609649](https://www.wikidata.org/wiki/Q66609649)  
**Source**: https://4ort.xyz/entity/q66609649


## References

1. SIMBAD
2. Spectral Classification of the Hot Components of a Large Sample of Stars with Composite Spectra, and Implication for the Absolute Magnitudes of the Cool Supergiant Components
3. The Tycho double star catalogue