Star
A white main-sequence star with a red dwarf companion, and the brightest star in the faint constellation Caelum.
| Type | Star |
|---|---|
| Distance from Earth | 65.7 ly |
| Diameter | 1,810,480 km |
| Mass | 2.94 × 10³⁰ kg |
| Temperature | 6,718°C |
| Apparent magnitude | 4.45 |
| Redshift | 0 |
| Hemisphere | Southern |
| Discovered | 1756 |
Stars spend most of their lives fusing hydrogen into helium in their core, and it's the balance between that outward pressure and gravity pulling inward that fixes how big and how bright a star gets.
At 1,810,480 km across, Alpha Caeli is 1.3 times the diameter of the Sun.
Its mass is 1.5 times the mass of the Sun.
The light reaching us from Alpha Caeli tonight left it around 66 years ago.
Its surface sits at 6,991 K, hotter than the Sun at 5,772 K, which is what sets its colour.
It has been on record since 1756.
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