الشعرى اليمانية vs Vega
| الخاصية |
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
|
الاختلافات الرئيسية
- ◆ 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.