Object | Alpha Centauri A | Sun |
---|---|---|
Type | Star, yellow dwarf | Star, yellow dwarf |
Age | 6.8 billion years | 4.6 billion years |
Diameter | 1,708,820 km | 1,392,684 km |
Mean radius | 854,411 km | 696,342 km |
Mass | 2.17 × 1030 kg | 1.98 × 1030 kg |
Surface gravity | 199.53 m/s² | 274.4 m/s² |
Circumference | 5.4 million km | 4.3 million km |
Surface area | 0.91 × 1013 km2 | 6.09 × 1012 km2 |
Volume | 2.6 × 1018 km3 | 1.41 × 1018 km3 |
Sun distance | 4.3 light years | 0 km |
Luminosity | 5.76 × 1026 W | 3.82 × 1026 W |
Photosphere temperature | 5,800 K | 5,772 K |
Distance from the Milky Way center | 27,200 light years | 27,200 light years |
Metallicity | 0.028 | 0.0122 |
Spectral classification | G2 V | G2V |
Absolute magnitude | 4.38 | 4.83 |
Right ascension | 14h 39m 35,88s | 19h 4m 30s |
Declination | −60° 50′ 13,4″ | +63.87° |