# Eta Ophiuchi

> star in the constellation Ophiuchus

**Wikidata**: [Q670536](https://www.wikidata.org/wiki/Q670536)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Eta_Ophiuchi)  
**Source**: https://4ort.xyz/entity/eta-ophiuchi


## References

1. SIMBAD
2. Source
3. Washington Double Star Catalog
4. Freebase Data Dumps. 2013
5. Catalogue of Stellar Photometry in Johnson's 11-color system
6. Validation of the new Hipparcos reduction
7. Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ∼55000 stars and mean radial velocities of 516 Galactic open clusters and associations
8. Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i
9. Rotational velocities of A-type stars. III. Velocity distributions
10. Rotational velocities of A-type stars. IV. Evolution of rotational velocities
11. Spectroscopy of New High Proper Motion Stars in the Northern Sky. I. New Nearby Stars, New High-Velocity Stars, and an Enhanced Classification Scheme for M Dwarfs