Sigma Cyg

HIP 105102; Sigma Cyg; 67 Cyg Star Cygnus (Cyg) Visible Level 2 Small telescope (4")

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Physical Properties

Magnitude 4.23

Range 4.19 - 4.26

Period 120 days

Variable Type ACYG

Spectral Type B9Iab

Star Color White (B-V 0.12)

Distance 297 ly

Position & Identifiers

RA 21h 17m 25.0s

Dec +39° 23' 41.0"

Constellation Cygnus (Cyg)

HR 8143

HIP 105102

Bayer Sigma

Flamsteed 67 Cyg

Visibility

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Size Comparison

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Stellar Lifecycle

Spectral Classification

Hertzsprung-Russell Diagram

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Blackbody Spectrum

Stellar Absorption Spectrum

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

Stellar Fusion

Stellar Notes

Variable Star

H alpha profile varies.

Spectroscopic Binary

11.043d?

Group/Cluster

Cyg OB4; embedded in dust.

Light Travel Time Machine

Relativistic Travel

Survey Image

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