# HD 191984

> double star in the constellation Aquila

**Wikidata**: [Q2401329](https://www.wikidata.org/wiki/Q2401329)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/HD_191984)  
**Source**: https://4ort.xyz/entity/hd-191984


## References

1. VizieR
2. Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5
3. Washington Double Star Catalog
4. SIMBAD
5. Freebase Data Dumps. 2013
6. Fourth USNO CCD Astrograph Catalog
7. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
8. Validation of the new Hipparcos reduction
9. Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ∼55000 stars and mean radial velocities of 516 Galactic open clusters and associations
10. Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i