# Q66493276

> astrophysical X-ray source in the constellation Ursa Minor

**Wikidata**: [Q66493276](https://www.wikidata.org/wiki/Q66493276)  
**Source**: https://4ort.xyz/entity/q66493276


## References

1. SIMBAD
2. VizieR Online Data Catalog: Henry Draper Catalogue and Extension, published in Ann. Harvard Obs. 91-100 (1918-1925)
3. UBV photometry of stars whose positions are accurately known
4. Gaia Data Release 2
5. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
6. Spectral properties of cool stars: extended abundance analysis of 1,617 planet-search stars
7. ROSAT All-Sky Survey Faint Source Catalogue