ذنب الدجاجة vs Vega
| Property |
ذنب الدجاجة |
Vega |
| التسمية |
50Alp Cyg |
3Alp Lyr |
| الكوكبة |
Cygnus |
Lyra |
| النوع الطيفي |
Class A — A-type (White) |
Class A — A-type (White) |
| القدر الظاهري |
+1.25 |
+0.03 |
| القدر المطلق |
-6.93 |
0.60 |
| المسافة |
1,412 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
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Both are A-type stars in the Summer Triangle, but they differ enormously in distance and luminosity.
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◆
Vega is only 25 light-years away; Deneb is the most distant first-magnitude star at ~2,615 light-years.
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◆
Deneb is intrinsically about 196,000 times more luminous than the Sun; Vega is 40 times more luminous.
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◆
Vega was the original photometric zero-magnitude reference star.
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◆
Deneb is a white supergiant with a radius ~203 R☉; Vega is a near-main-sequence star with radius ~2.4 R☉.