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Sigma Ursae Majoris

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Two star systems in Ursa Minor Sigma Ursae Majoris is located in 100x100σ¹σ¹σ²σ²

The Bayer designation σ Ursae Majoris (Sigma Ursae Majoris, σ UMa) is shared by two star systems in the constellation Ursa Major:

  • σ (11 Ursae Majoris)
  • σ (13 Ursae Majoris)

They are separated by 0.33° in the sky.

The two stars, Sigma and Sigma together, are considered an optical double star. They are not a binary star, in that they are not gravitationally linked, but they are close to each other as seen in the sky.

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