The Bayer designation Sigma Ursae Majoris (σ UMa, σ Ursae Majoris) is shared by two star systems in the constellation Ursa Major:
- Sigma¹ Ursae Majoris (11 Ursae Majoris)
- Sigma² Ursae Majoris (13 Ursae Majoris)
They are separated by 0.33° in the sky.
The two stars, Sigma¹ and Sigma² 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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Stars of Ursa Major
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| Bayer |
- α (Dubhe)
- β (Merak)
- γ (Phecda)
- δ (Megrez)
- ε (Alioth)
- ζ (Mizar)
- η (Alkaid)
- θ (Alhaud)
- ι (Talitha Bor)
- κ (Talitha Aus)
- λ (Tania Bor)
- μ (Tania Aus)
- ν (Alula Bor)
- ξ (Alula Aus)
- ο (Muscida)
- π1
- π2
- ρ
- σ1
- σ2
- τ
- υ
- φ
- χ
- ψ
- ω
- b
- c
- d
- e
- f
- g (Alcor)
- h
- A
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| Flamsteed |
- 1 (ο, Muscida)
- 2 (A)
- 3 (π1)
- 4 (π2)
- 5 (b)
- 6
- 7
- 8 (ρ)
- 9 (ι, Talitha Bor)
- 11 (σ1)
- 12 (κ, Talitha Aus)
- 13 (σ2)
- 14 (τ)
- 15 (f)
- 16 (c)
- 17
- 18 (e)
- 19
- 20
- 21
- 22
- 23 (h)
- 24 (d)
- 25 (θ, Alhaud)
- 26
- 27
- 28
- 29 (υ)
- 30 (φ)
- 31
- 32
- 33 (λ, Tania Bor)
- 34 (μ, Tania Aus)
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- 43
- 44
- 45 (ω)
- 46
- 47
- 48 (β, Merak)
- 49
- 50 (α, Dubhe)
- 51
- 52 (ψ)
- 53 (ξ, Alula Aus)
- 54 (ν, Alula Bor)
- 55
- 56
- 57
- 58
- 59
- 60
- 61
- 62
- 63 (χ)
- 64 (γ, Phecda)
- 65
- 66
- 67
- 68
- 69 (δ, Megrez)
- 70
- 71
- 72
- 73
- 74
- 75
- 76
- 77 (ε, Alioth)
- 78
- 79 (ζ, Mizar)
- 80 (g, Alcor)
- 81
- 82
- 83
- 84
- 85 (η, Alkaid)
- 86
- 55 Cam
- 56 Cam
- 57 Cam
- 1 CVn
- 14 LMi
- 15 LMi
- 47 LMi
- 37 Lyn
- 41 Lyn
- 44 Lyn
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| Nearby |
- Lalande 21185
- WISE 1405+5534
- Gliese 412
- Groombridge 1618
- Gliese 338
- GJ 1151
- ξ (Alula Aus)
- Gliese 450
- Gliese 424
- Groombridge 1830
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| Other |
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List
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