Betelgeuse vs Sirius
| Property |
Betelgeuse |
Sirius |
| Penunjukan |
58Alp Ori |
9Alp CMa |
| Rasi Bintang |
Orion |
Canis Major |
| Kelas Spektral |
Class M — M-type (Red) |
Class A — A-type (White) |
| Magnitudo Semu |
+0.45 |
-1.44 |
| Magnitudo Mutlak |
-5.47 |
1.45 |
| Jarak |
498 ly |
8.6 ly |
| Massa |
N/A |
N/A |
| Radius |
N/A |
N/A |
| Suhu |
N/A |
N/A |
| Luminositas |
N/A |
N/A |
Key Differences
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Sirius is an A-type main-sequence star; Betelgeuse is an M-type red supergiant nearing the end of its life.
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Betelgeuse has a radius of ~887 R☉ — over 500 times larger than Sirius at 1.71 R☉.
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Sirius is only 8.6 light-years away; Betelgeuse is about 700 light-years distant.
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Betelgeuse is luminosity-dominant at ~126,000 L☉ versus Sirius at 25.4 L☉.
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Sirius is the brightest star in the night sky; Betelgeuse is a famous supernova candidate.