# HD 225218

> quadruple star system in the constellation of Andromeda

**Wikidata**: [Q1748031](https://www.wikidata.org/wiki/Q1748031)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/HD_225218)  
**Source**: https://4ort.xyz/entity/hd-225218


## References

1. SIMBAD
2. VizieR
3. A study of the bright A stars. I. A catalogue of spectral classifications
4. Visual multiples. VII. MK classifications
5. Washington Double Star Catalog
6. Freebase Data Dumps. 2013
7. UBV photometry of stars whose positions are accurately known. VI
8. The Tycho-2 catalogue of the 2.5 million brightest stars
9. Fourth USNO CCD Astrograph Catalog
10. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
11. Validation of the new Hipparcos reduction
12. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
13. Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i