Star
An eclipsing binary and the brightest star in Capricornus, whose name means the tail of the goat.
| Type | Star |
|---|---|
| Distance from Earth | 38.7 ly |
| Diameter | 2,660,020 km |
| Mass | 3.98 × 10³⁰ kg |
| Temperature | 7,028°C |
| Apparent magnitude | 2.81 |
| Redshift | 0 |
| Hemisphere | Southern |
| Discovered | 150 |
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 2,660,020 km across, Deneb Algedi is 1.9 times the diameter of the Sun.
Its mass is 2.0 times the mass of the Sun.
The light reaching us from Deneb Algedi tonight left it around 39 years ago.
Its surface sits at 7,301 K, hotter than the Sun at 5,772 K, which is what sets its colour.
It has been on record since the year 150.
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