# Q77842642

> star in the constellation Serpens

**Wikidata**: [Q77842642](https://www.wikidata.org/wiki/Q77842642)  
**Source**: https://4ort.xyz/entity/q77842642


## References

1. SIMBAD
2. The Galactic O-Star Spectroscopic Survey. I. Classification system and bright northern stars in the blue-violet at R ~ 2500
3. NGC 6611: a cluster caught in the act
4. The Tycho-2 catalogue of the 2.5 million brightest stars
5. Catalog of Galactic OB Stars
6. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
7. Fourth USNO CCD Astrograph Catalog
8. Gaia Data Release 2
9. The VLT-FLAMES survey of massive stars: Observations in the Galactic clusters NGC 3293, NGC 4755 and NGC 6611
10. The interstellar Ca II distance scale