# Q81787311
**Wikidata**: [Q81787311](https://www.wikidata.org/wiki/Q81787311)  
**Source**: https://4ort.xyz/entity/q81787311


## References

1. SIMBAD
2. VizieR Online Data Catalog: Henry Draper Catalogue and Extension, published in Ann. Harvard Obs. 91-100 (1918-1925)
3. Washington Double Star Catalog
4. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
5. Fourth USNO CCD Astrograph Catalog
6. Validation of the new Hipparcos reduction
7. X-ray-emitting stars identified from the ROSAT All-Sky Survey and the Sloan Digital Sky Survey