Sigma Orionis
Star system
>
Sigma Orionis or Sigma Ori is a multiple star system in the constellation Orion, consisting of the brightest members of a young open cluster. It is found at the eastern end of the belt, south west of Alnitak and west of the Horsehead Nebula which... Wikipedia
Magnitude: 3.77
Distance to Earth: 1,264 light years
Radius: 2.1234 million mi
Constellation: Orion
Absolute magnitude (MV): −3.49 (Aa); −2.90 (Ab); −2.79 (B)
Apparent magnitude (V): A: 4.07; B: 5.27; C: 8.79; D: 6.62; E: 6.66 (6.61 - 6.77)
Radial velocity (Rv): −29.45 ± 0.45 km/s