B-type main-sequence star
| B-type main-sequence star | |
|---|---|
 | |
| Characteristics | |
| Type | Class of large and bright main sequence star |
| Mass range | 2.75–18 M☉ |
| Temperature | 10,700–31,400 K |
| Average luminosity | 73–45,000 L☉ |
| External links | |
 Media category | |
 Q767432 | |
| Additional Information | |
A B-type main-sequence star is a main-sequence (core hydrogen-burning) star of spectral type B. The spectral luminosity class is given as V. These stars have from 2 to 18 times the mass of the Sun and surface temperatures between about 10,000 and 30,000 K.
B-type stars are luminous and blue-white. Their spectra have strong neutral helium absorption lines, which are most prominent at the B2 subclass, and moderately strong hydrogen lines. Examples include Regulus, Algol A and Acrux.