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Loading content48 Librae is a blue supergiant in the constellation Libra (Librae), lying about 467.9 light-years from Earth.
Class B. Hot, blue-white stars. Massive and luminous, they often light up the regions where they form. Such stars have surface temperatures around 10,000–30,000 K and appear blue-white to the eye.
| Spectral type | B8Ia/Iab |
| Luminosity class | Iab |
| Apparent magnitude | 4.95 |
| Absolute magnitude | -0.83 |
| Luminosity (Sun = 1) | 188 |
| Colour index (B−V) | -0.08 |
| Distance | 467.9 ly (143.47 pc) |
Values are real catalogue data; fields without a reliable value are omitted, never estimated.
A blue supergiant is among the most luminous stars known — enormous, hot, and massive. Many end their lives as supernovae.
Facts on this topic will be cited from these primary and reference sources.
Aggregated, openly-licensed star catalogue combining Hipparcos, the Yale Bright Star Catalogue, and the Gliese Catalogue of Nearby Stars.
High-precision parallax, magnitude, and position for ~118,000 stars.