الشعرى اليمانية vs Vega
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| Property | الشعرى اليمانية | Vega |
|---|---|---|
| التسمية | 9Alp CMa | 3Alp Lyr |
| الكوكبة | Canis Major | Lyra |
| النوع الطيفي | Class A — A-type (White) | Class A — A-type (White) |
| القدر الظاهري | -1.44 | +0.03 |
| القدر المطلق | 1.45 | 0.60 |
| المسافة | 8.6 ly | 25.0 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
- ◆ Both are brilliant white A-type stars and among the most prominent in the northern sky.
- ◆ Sirius is the brightest star overall at magnitude −1.46; Vega is the fifth-brightest at magnitude 0.03.
- ◆ Sirius is 8.6 light-years away; Vega is 25 light-years from the Sun.
- ◆ Vega was the original zero-point for stellar magnitude; Sirius sets the scale of brightness.
- ◆ Sirius has a white dwarf companion; Vega has a prominent debris disk but no known companion.