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Loading contentMu Sagittarii
Polis is a blue giant in the constellation Sagittarius (Sagittarii).
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 | B2III: |
| Luminosity class | III |
| Apparent magnitude | 3.84 |
| Absolute magnitude | -16.16 |
| Luminosity (Sun = 1) | 253,512,863 |
| Colour index (B−V) | 0.195 |
Values are real catalogue data; fields without a reliable value are omitted, never estimated.
A blue giant is a hot, massive, highly luminous star that has evolved off the main sequence. Such stars are short-lived on cosmic timescales.
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.