Gienah cygni

Epsilon Cygni

Gienah cygni

Distance (Light Years) 72.06 ± 0.84
Apparent Magnitude 2.48
Color (B-V)1.03

Names For This Star

Gienah derives from the Arabic Al Janah meaning "The Wing." The star should probably be called "Gienah Cygni" to distinguish it from the Gienah in Corvus.

Description of the Star

Gienah Cygni is a cool, orange K0-III giant star 40 times as luminous as the sun. The spectral type implies a temperature of perhaps 4500 K, a mass more than 4 times that of the sun and a radius maybe 16 times greater.

Gienah has a dim 13th magnitude companion designated Gienah C lying 78 seconds of arc from the A component, corresponding to a projected distance of 1700 AU. (The B component seems not to be physically associated with the system; it is merely a background star that appears at a small angular separation from A.)

Other Designations For This Star


53 Cygni

Hipparcos Identifier (HIP Number)


Harvard Revised (HR Number)


Henry Draper Catalog (HD Number)


Bonner Durchmusterung (BD Number)

BD+33 4018
Smithsonian Astrophysical
Observatory compendium (SAO Number)

Fundamental Katalog (FK5 Number)



Copyright © 1998 - 2010 by Arnold V. Lesikar,
Professor Emeritus
Dept. of Physics, Astronomy, and Engineering Science,
St. Cloud State University,St. Cloud, MN 56301-4498

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