# HD 556

> binary star in the constellation Andromeda

**Wikidata**: [Q74004442](https://www.wikidata.org/wiki/Q74004442)  
**Source**: https://4ort.xyz/entity/q74004442


## References

1. Washington Double Star Catalog
2. SIMBAD
3. Visual multiples. VII. MK classifications
4. Validation of the new Hipparcos reduction
5. Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ∼55000 stars and mean radial velocities of 516 Galactic open clusters and associations