# Q91645644
**Wikidata**: [Q91645644](https://www.wikidata.org/wiki/Q91645644)  
**Source**: https://4ort.xyz/entity/q91645644


## References

1. SIMBAD
2. The upper main sequence of OB associations. II. The single-lined O stars : spectral classification of northern stars and lines of C and N
3. Washington Double Star Catalog
4. Catalog of Galactic OB Stars
5. The IACOB project. V. Spectroscopic parameters of the O-type stars in the modern grid of standards for spectral classification
6. Validation of the new Hipparcos reduction