# Q66647614
**Wikidata**: [Q66647614](https://www.wikidata.org/wiki/Q66647614)  
**Source**: https://4ort.xyz/entity/q66647614


## References

1. SIMBAD
2. Some spectroscopic characteristics of OB stars: an investigation of the space distribution of certain OB stars and the reference frame of the classification
3. The Uppsala spectral classification
4. The space distribution of early-type stars in Cygnus
5. Line broadening in the spectra of O and early B-type stars
6. Studies in galactic structure. II. Luminosity classification for 1270 blue giants stars
7. A study of the concentration of early-type stars in Cygnus
8. Catalog of Galactic OB Stars
9. Gaia Data Release 2
10. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
11. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
12. Catalogue of rotational velocities of the stars