# Q77825630

> astrophysical X-ray source in the constellation Leo

**Wikidata**: [Q77825630](https://www.wikidata.org/wiki/Q77825630)  
**Source**: https://4ort.xyz/entity/q77825630


## References

1. SIMBAD
2. VizieR Online Data Catalog: Henry Draper Catalogue and Extension, published in Ann. Harvard Obs. 91-100 (1918-1925)
3. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
4. The Tycho-2 catalogue of the 2.5 million brightest stars
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)