Alpha Cygni vs Vega
| Properti |
Alpha Cygni
|
Vega
|
| Penunjukan |
50Alp Cyg |
3Alp Lyr |
| Rasi Bintang |
Cygnus |
Lyra |
| Kelas Spektral |
Class A — A-type (White) |
Class A — A-type (White) |
| Magnitudo Semu |
+1.25 |
+0.03 |
| Magnitudo Mutlak |
-6,93
|
0,60
|
| Jarak |
1,412 ly |
25.0 ly |
| Massa |
N/A
|
N/A
|
| Radius |
N/A
|
N/A
|
| Suhu |
N/A
|
N/A
|
| Luminositas |
N/A
|
N/A
|
Perbedaan Utama
- ◆ Both are A-type stars in the Summer Triangle, but they differ enormously in distance and luminosity.
- ◆ Vega is only 25 light-years away; Deneb is the most distant first-magnitude star at ~2,615 light-years.
- ◆ Deneb is intrinsically about 196,000 times more luminous than the Sun; Vega is 40 times more luminous.
- ◆ Vega was the original photometric zero-magnitude reference star.
- ◆ Deneb is a white supergiant with a radius ~203 R☉; Vega is a near-main-sequence star with radius ~2.4 R☉.