Iota Cassiopeiae

Iota Cassiopeiae (ι Cas, ι Cassiopeiae) is a star system in the constellation Cassiopeia. It is approximately 141.6 light years from Earth.

The primary component, ι Cassiopeiae A, is a white A-type main sequence dwarf with a mean apparent magnitude of +4.64. It is classified as an α² Canum Venaticorum type variable star and the brightness of the system varies from magnitude +4.45 to +4.53 with a period of 1.74 days. Component A is a spectroscopic binary. Its unresolved companion has an orbital period of 52.4 years and is separated from the primary by 0.113 arcseconds, or at least 5 AU.

The second astrometric component, ι Cassiopeiae B, is a yellow-white F-type main sequence dwarf with an apparent magnitude of +6.89. It is 2.27 arcseconds, or at least 100 AU, from the primary. It has an orbital period of 840 years. The third astrometric component, ι Cassiopeiae C, is a yellow G-type dwarf, with an apparent magnitude of +8.40. It is 7.3 arcseconds (at least 300 AU) from the primary.

Stars of Cassiopeia
Bayer
  • α (Schedar)
  • β (Caph)
  • γ (Tsih)
  • δ (Ruchbah)
  • ε (Segin)
  • ζ
  • η (Achird)
  • θ
  • ι
  • κ
  • λ
  • μ
  • ν
  • ξ
  • ο
  • π
  • ρ
  • σ
  • τ
  • υ1
  • υ2
  • φ
  • χ
  • ψ
  • ω
  • A
Flamsteed
  • 1
  • 2
  • 4
  • 5 (τ)
  • 6
  • 7 (ρ)
  • 8 (σ)
  • 9
  • 10
  • 11 (β, Caph)
  • 12
  • 13
  • 14 (λ)
  • 15 (κ)
  • 16
  • 17 (ζ)
  • 18 (α, Schedar)
  • 19 (ξ)
  • 20 (π)
  • 21
  • 22 (ο)
  • 23
  • 24 (η, Achird)
  • 25 (ν)
  • 26 (υ1)
  • 27 (γ, Tsih)
  • 28 (υ2)
  • 30 (μ)
  • 31
  • 32
  • 33 (θ)
  • 34 (φ)
  • 35
  • 36 (ψ)
  • 37 (δ, Ruchbah)
  • 38
  • 39 (χ)
  • 40
  • 42
  • 43
  • 44
  • 45 (ε, Segin)
  • 46 (ω)
  • 47
  • 48 (A)
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • List
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