# Alnilam

> blue supergiant star

**Wikidata**: [Q13070](https://www.wikidata.org/wiki/Q13070)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Alnilam)  
**Source**: https://4ort.xyz/entity/alnilam


## References

1. SIMBAD
2. [Source](https://thenauticalalmanac.com/TNARegular/1981_Nautical_Almanac.pdf)
3. Spectral Classification
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. Line strengths for southerns OB stars. II. Observations with moderate dispersion
6. The kinematics of the Gould belt: an expanding group ?
7. Spectral classification of Southern fundamental stars
8. Distances of Southern B-stars and galactic structure from H-gamma luminosities
9. New bright variable stars
10. Seven-colour photometry of O, B and A stars
11. Contribution aux recherches de photometrie photoelectrique dans la Galaxie
12. Standard stars for spectral classification
13. Photoelectric determination of the equivalent widths of H in the spectra of early type stars
14. Spectrophotometric measurements of early type stars
15. Color excesses from six-color photometry of supergiant stars
16. Spectral types of bright southern stars
17. A two-dimensionnal quantitative spectral classification of 283 O5-B7 stars and the construction of a spectrum-absolute magnitude diagram
18. The equivalent widths of absorption lines in the spectra of 109 O5-B7stars
19. Multicolor photoelectric photometry of stars with composite spectra
20. A spectroscopic and photometric study of the Be stars
21. The law of interstellar reddening
22. Southern hemisphere photometry. II. Photoelectric measures of bright stars
23. Cepheid variables and galactic absorption
24. Line broadening in the spectra of O and early B-type stars
25. Six-color photometry of stars. VIII. The colors of 409 stars of different spectral types
26. Observational confirmation of a theory of stellar evolution
27. Emission lines in O stars
28. Studies in galactic structure. II. Luminosity classification for 1270 blue giants stars
29. Magnitudes and colors for 833 Northern and Southern stars
30. Three-color observations of 108 stars intended for use as photometric standards
31. A study of the Orion aggregate of early-type stars. II
32. Recherches sur la loi d'absorption de la poussiere interstellaire et sur le spectre continu des etoiles O et B
33. Red and infrared magnitudes for 138 stars observed as photometric standards
34. Some characteristics of color systems
35. Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas
36. Source
37. Contribution a l'etude de la zone convective des etoiles
38. A study of the Orion aggregate of early-type stars
39. The intensity of certain lines of He I in the B stars
40. Absolute Helligkeiten von 115 B-Sternen
41. Revised Standards for Supergiants on the System of the Yerkes Spectral Atlas
42. Neutral Oxygen in stellar atmospheres
43. Variability of OB stars from TESS southern Sectors 1-13 and high-resolution IACOB and OWN spectroscopy
44. Photoeletric measures of hydrogen-line absorption in early-type stars
45. Freebase Data Dumps. 2013
46. [General Catalogue of Variable Stars](http://www.sai.msu.su/gcvs/cgi-bin/search.cgi?search=eps+Ori)
47. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+, 2007-2017)
48. Catalogue of Stellar Photometry in Johnson's 11-color system
49. Validation of the new Hipparcos reduction
50. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system