# Q66631879

> astrophysical X-ray source in the constellation Ara

**Wikidata**: [Q66631879](https://www.wikidata.org/wiki/Q66631879)  
**Source**: https://4ort.xyz/entity/q66631879


## References

1. Washington Double Star Catalog
2. SIMBAD
3. Catalogue of two dimentional spectral types for the HD stars, Vol. 2
4. The Tycho-2 catalogue of the 2.5 million brightest stars
5. Gaia Data Release 2
6. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
7. Validation of the new Hipparcos reduction
8. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
9. ROSAT All-Sky Survey Faint Source Catalogue
10. New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s)