Star
A mercury-manganese star shared historically between Andromeda and Pegasus.
| Type | Star |
|---|---|
| Distance from Earth | 97 ly |
| Diameter | 3,756,780 km |
| Mass | 7.16 × 10³⁰ kg |
| Temperature | 13,527°C |
| Apparent magnitude | 2.06 |
| Redshift | 0 |
| Hemisphere | Northern |
| 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 3,756,780 km across, Alpheratz is 2.7 times the diameter of the Sun.
Its mass is 3.6 times the mass of the Sun.
The light reaching us from Alpheratz tonight left it around 97 years ago.
Its surface sits at 13,800 K, hotter than the Sun at 5,772 K, which is what sets its colour.
It has been on record since the year 150.
Play today's Cosmodle