SaiphKappa Orionis, the right knee of Orion (from our point of view left), is a blue star with a surface temperature of 26 000 kelvin.Although nearer to us and much more luminous as Rigel, it seems to be less bright. This is due to its high temperature, causing it to shine much stronger in ultraviolet, which is invisible to us. Constellation: Orion Distance: 720 light-years Spectral class: B0.5 Visual magnitude: 2.06 Luminosity: 57 500 * Sun Mass: 15 - 17 * Sun Diameter: 11 * Sun Back: List of big and giant stars |
Photo: Gruppo Astrofili Frisini |
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