Antarès vs Bételgeuse
| Propriété |
Antarès
|
Bételgeuse
|
| Désignation |
21Alp Sco |
58Alp Ori |
| Constellation |
Scorpius |
Orion |
| Classe Spectrale |
Class M — M-type (Red) |
Class M — M-type (Red) |
| Magnitude Apparente |
+1.06 |
+0.45 |
| Magnitude Absolue |
-5,09
|
-5,47
|
| Distance |
554 ly |
498 ly |
| Masse |
N/A
|
N/A
|
| Rayon |
N/A
|
N/A
|
| Température |
N/A
|
N/A
|
| Luminosité |
N/A
|
N/A
|
Différences Clés
- ◆ Both are famous red supergiants and iconic supernova candidates visible to the naked eye.
- ◆ Betelgeuse is significantly larger at ~887 R☉; Antares has a radius of ~680 R☉.
- ◆ Antares is in Scorpius and has long been compared to Mars due to its red colour; Betelgeuse marks Orion's shoulder.
- ◆ Antares is about 604 light-years away; Betelgeuse is approximately 700 light-years distant.
- ◆ Both show irregular variability and dramatic mass-loss through powerful stellar winds.