Star
The Garnet Star, a deep red supergiant so large that placing it in the Sun's position would engulf the whole asteroid belt.
| Type | Star |
|---|---|
| Distance from Earth | 1,370 ly |
| Diameter | 1,060,000,000 km |
| Mass | 2.19 × 10^31 kg |
| Temperature | 3,527°C |
| Apparent magnitude | 4.08 |
| Redshift | 0 |
| Discovered | 1783 |
At 1,060,000,000 km across, Mu Cephei is 761 times the diameter of the Sun.
Its mass is 11 times the mass of the Sun.
The light reaching us from Mu Cephei tonight left it around 1,370 years ago.
Its surface sits at 3,800 K, cooler than the Sun at 5,772 K, which is what sets its colour.
It has been on record since 1783.
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