منكب الجوزاء vs الشعرى اليمانية
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| Property | منكب الجوزاء | الشعرى اليمانية |
|---|---|---|
| التسمية | 58Alp Ori | 9Alp CMa |
| الكوكبة | Orion | Canis Major |
| النوع الطيفي | Class M — M-type (Red) | Class A — A-type (White) |
| القدر الظاهري | +0.45 | -1.44 |
| القدر المطلق | -5.47 | 1.45 |
| المسافة | 498 ly | 8.6 ly |
| الكتلة | N/A | N/A |
| نصف القطر | N/A | N/A |
| درجة الحرارة | N/A | N/A |
| السطوع | N/A | N/A |
Key Differences
- ◆ Sirius is an A-type main-sequence star; Betelgeuse is an M-type red supergiant nearing the end of its life.
- ◆ Betelgeuse has a radius of ~887 R☉ — over 500 times larger than Sirius at 1.71 R☉.
- ◆ Sirius is only 8.6 light-years away; Betelgeuse is about 700 light-years distant.
- ◆ Betelgeuse is luminosity-dominant at ~126,000 L☉ versus Sirius at 25.4 L☉.
- ◆ Sirius is the brightest star in the night sky; Betelgeuse is a famous supernova candidate.