# Q74186093
**Wikidata**: [Q74186093](https://www.wikidata.org/wiki/Q74186093)  
**Source**: https://4ort.xyz/entity/q74186093


## References

1. SIMBAD
2. The Interacting Early‐Type Binary BD +40o4220 (V729 Cyg): Modeling the Colliding Winds Region
3. The Galactic O-Star Spectroscopic Survey. I. Classification system and bright northern stars in the blue-violet at R ~ 2500
4. Washington Double Star Catalog
5. Variability survey of brightest stars in selected OB associations
6. Up-to-date linear elements of eclipsing binaries
7. Gaia Data Release 2
8. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
9. Catalog of Galactic OB Stars
10. A high angular resolution survey of massive stars in Cygnus OB2: results from the Hubble Space Telescope fine guidance sensors
11. The Tycho double star catalogue
12. Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ∼55000 stars and mean radial velocities of 516 Galactic open clusters and associations
13. Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Radial velocities: The Wilson-Evans-Batten catalogue