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A star system to the south of Orion's Belt, close to Alnitak (the Belt's eastern star) in the sky. It is a young system, having recently formed on the fringes of the Orion Molecular Cloud. The primary belongs to the O-type spectral classification, suggesting a surface temperature of up to 50,000 Kelvin. There are a total of five young stars in the Sigma Orionis system, and it is often compared with the Trapezium complex that lies nearby in the Orion Nebula.

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