# Q77356250

> astrophysical X-ray source in the constellation Norma

**Wikidata**: [Q77356250](https://www.wikidata.org/wiki/Q77356250)  
**Source**: https://4ort.xyz/entity/q77356250


## References

1. SIMBAD
2. Catalogue of two dimentional spectral types for the HD stars, Vol. 2
3. Washington Double Star Catalog
4. The Tycho-2 catalogue of the 2.5 million brightest stars
5. Validation of the new Hipparcos reduction
6. Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ∼55000 stars and mean radial velocities of 516 Galactic open clusters and associations