# 9 Cephei

> variable star in the constellation Cepheus

**Wikidata**: [Q4646397](https://www.wikidata.org/wiki/Q4646397)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/9_Cephei)  
**Source**: https://4ort.xyz/entity/9-cephei


## References

1. General Catalogue of Variable Stars
2. SIMBAD
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4. Some spectroscopic characteristics of OB stars: an investigation of the space distribution of certain OB stars and the reference frame of the classification
5. The kinematics of the Gould belt: an expanding group ?
6. A spectroscopic and photometric investigation of the association Cepheus OB2
7. Photoelectric measures of the 4430 A diffuse interstellar band
8. Space motions and distribution of the apparently bright B-type stars
9. Seven-colour photometry of O, B and A stars
10. Spectrophotometric measurements of early type stars. V. Results and discussion for 20 stars of MK type B2
11. Color excesses from six-color photometry of supergiant stars
12. A two-dimensionnal quantitative spectral classification of 283 O5-B7 stars and the construction of a spectrum-absolute magnitude diagram
13. The equivalent widths of absorption lines in the spectra of 109 O5-B7stars
14. Two-dimensional spectral classification by narrow-band photometry for B stars in clusters and associations
15. The law of interstellar reddening
16. Interstellar absorption lines in distant stars. I. Northern Milky Way
17. Six-color photometry of stars. VIII. The colors of 409 stars of different spectral types
18. Studies in galactic structure. II. Luminosity classification for 1270 blue giants stars
19. Axial Rotation and Line Broadening in Stars of Spectral Types F0-K5
20. Recherches sur la loi d'absorption de la poussiere interstellaire et sur le spectre continu des etoiles O et B
21. Observations of five stars suspected to belong to the class of beta Canis Majoris stars
22. Studies in galactic structure. I. A preliminary determination of the space distribution of the blue giants
23. Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas
24. Source
25. Contribution a l'etude de la zone convective des etoiles
26. The intensity of certain lines of He I in the B stars
27. Revised Standards for Supergiants on the System of the Yerkes Spectral Atlas
28. Freebase Data Dumps. 2013
29. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+, 2007-2017)
30. Catalogue of Stellar Photometry in Johnson's 11-color system
31. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
32. Gaia Early Data Release 3
33. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
34. The atmospheric parameters and spectral interpolator for the MILES stars
35. The interstellar Ca II distance scale
36. The IACOB project. III. New observational clues to understand macroturbulent broadening in massive O- and B-type stars
37. Gaia Data Release 2
38. Bayesian statistics as a new tool for spectral analysis - I. Application for the determination of basic parameters of massive stars