Object | Arcturus | Sun |
---|---|---|
Type | Star, red giant | Star, yellow dwarf |
Age | 7.1 billion years | 4.6 billion years |
Diameter | 35,374,170 km | 1,392,684 km |
Mean radius | 17,687,080 km | 696,342 km |
Mass | 2.13 × 1030 kg | 1.98 × 1030 kg |
Surface gravity | 0.46 m/s² | 274.4 m/s² |
Circumference | 111.1 million km | 4.3 million km |
Surface area | 3.93 × 1015 km2 | 6.09 × 1012 km2 |
Volume | 2.31 × 1022 km3 | 1.41 × 1018 km3 |
Average orbital speed | 122 km/s | 1.99 km/s |
Sun distance | 36.7 light years | 0 km |
Luminosity | 6.49 × 1028 W | 3.82 × 1026 W |
Photosphere temperature | 4,286 K | 5,772 K |
Distance from the Milky Way center | - | 27,200 light years |
Spectral classification | K1.5 IIIFe-0.5 | G2V |
Absolute magnitude | -0.31 | 4.83 |
Right ascension | 14h 15m 39,67s | 19h 4m 30s |
Declination | +19° 10′ 56,67″ | +63.87° |