Sigma Cygni (HIP 105102), a blue-white supergiant star in Stars

Sigma Cygni (HIP 105102) is a blue-white supergiant star (B9.5Ia) in Stars, 2,618 light years from Earth at magnitude 4.22.

Ashland Astronomy Studio October 3, 2026 Star

Sigma Cygni (HIP 105102)

Sigma Cygni is a blue-white supergiant star in the constellation Stars. At 2,618 light years away, it shines at an apparent visual magnitude of 4.22. Iron abundance: 0.15 (141% of the Sun). Galactic velocity: 14.7 km/s. Galactic orbit: 24,015 28,040 light years from galactic center.

Sky position: RA 21h 17m, Dec +39° 23.7'

Spectral type: B9.5Ia

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