# alf For B
**Wikidata**: [Q66610376](https://www.wikidata.org/wiki/Q66610376)  
**Source**: https://4ort.xyz/entity/alf-for-b


## References

1. SIMBAD
2. Close visual binaries. I. MK classifications
3. MK classification for visual binary components
4. Washington Double Star Catalog
5. Fourth USNO CCD Astrograph Catalog
6. The Tycho double star catalogue
7. Gaia Data Release 2