Star
A white main-sequence star and the brightest in Lacerta, a faint zigzag of stars between Cygnus and Andromeda.
| Type | Star |
|---|---|
| Distance from Earth | 103 ly |
| Diameter | 2,980,340 km |
| Mass | 4.36 × 10³⁰ kg |
| Temperature | 8,777°C |
| Apparent magnitude | 3.77 |
| Redshift | 0 |
| Hemisphere | Northern |
| Discovered | 1687 |
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 2,980,340 km across, Stellio is 2.1 times the diameter of the Sun.
Its mass is 2.2 times the mass of the Sun.
The light reaching us from Stellio tonight left it around 103 years ago.
Its surface sits at 9,050 K, hotter than the Sun at 5,772 K, which is what sets its colour.
It has been on record since 1687.
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