# Q89078969

> astrophysical X-ray source in the constellation Perseus

**Wikidata**: [Q89078969](https://www.wikidata.org/wiki/Q89078969)  
**Source**: https://4ort.xyz/entity/q89078969


## References

1. SIMBAD
2. Radial velocities, spectral types and luminosity classes of 820 stars
3. The Tycho-2 catalogue of the 2.5 million brightest stars
4. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
5. Gaia Data Release 2
6. ROSAT All-Sky Survey Faint Source Catalogue
7. New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s)