Object | Arcturus | R136a1 |
---|---|---|
Type | Star, red giant | Star, Wolf-Rayet |
Age | 7.1 billion years | 300,000 years |
Diameter | 35,374,170 km | 49,301,000 km |
Mean radius | 17,687,080 km | 24,650,500 km |
Mass | 2.13 × 1030 kg | 4.55 × 1032 kg |
Surface gravity | 0.46 m/s² | 100 m/s² |
Circumference | 111.1 million km | 161.1 million km |
Surface area | 3.93 × 1015 km2 | 8.26 × 1015 km2 |
Volume | 2.31 × 1022 km3 | 7.06 × 1022 km3 |
Sun distance | 36.7 light years | 163,000 light years |
Luminosity | 6.49 × 1028 W | 3.32 × 1033 W |
Photosphere temperature | 4,286 K | 56,000 K |
Spectral classification | K1.5 IIIFe-0.5 | WN5h |
Absolute magnitude | -0.31 | -8.09 |
Right ascension | 14h 15m 39,67s | 5h 38m 42,43s |
Declination | +19° 10′ 56,67″ | −69° 06′ 02,2″ |