# HD 20809

> star in the constellation Perseus

**Wikidata**: [Q10849333](https://www.wikidata.org/wiki/Q10849333)  
**Source**: https://4ort.xyz/entity/q10849333


## References

1. General Catalogue of Variable Stars
2. [VizieR](https://vizier.u-strasbg.fr/viz-bin/VizieR-5?-ref=VIZ6268182ac6e8a&-out.add=.&-source=VI/42/out&-c=048.5938%20%2b48.7631,eq=B1875,rs=2)
3. The Uppsala spectral classification
4. Das Farben-Helligkeits Diagram des Bewegungshaufens um alpha Persei
5. Two-dimensional spectral classification by narrow-band photometry for B stars in clusters and associations
6. Photometry of the Perseus aggregates
7. Axial Rotation and Line Broadening in Stars of Spectral Types F0-K5
8. The color-luminosity array for some galactic clusters
9. Magnitudes and colors for 833 Northern and Southern stars
10. Magnitudes and colors of some members of the Perseus cluster
11. Absolute Helligkeiten von 115 B-Sternen
12. The moving cluster in Perseus
13. Spectral types in the alpha Persei cluster
14. The H-R diagram of the alpha Persei cluster
15. SIMBAD
16. Gaia Data Release 2
17. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
18. Gaia Data Release 2. Observational Hertzsprung-Russell diagrams
19. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
20. Rotational Velocities of B Stars