# Acrab

> spectroscopic binary in the constellation Scorpius

**Wikidata**: [Q66477350](https://www.wikidata.org/wiki/Q66477350)  
**Source**: https://4ort.xyz/entity/acrab


## References

1. SIMBAD
2. Rotational velocities and spectral types for a sample of binary systems
3. Spectral types and luminosities of B, A and F southern stars
4. Visual multiples. VII. MK classifications
5. Washington Double Star Catalog
6. Catalogue of Stellar Photometry in Johnson's 11-color system
7. Gaia Data Release 2
8. Acrab. All Skies Encyclopaedia
9. Validation of the new Hipparcos reduction
10. Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system
11. A study of some early-type close binary stars
12. The revision of the general catalogue of radial velocities
13. The interstellar Ca II distance scale
14. The IACOB project. III. New observational clues to understand macroturbulent broadening in massive O- and B-type stars
15. Fundamental parameters of B supergiants from the BCD system. I. Calibration of the (λ_1, D) parameters into Teff