Star lore
Sadr
Direct answer
Sadr is Gamma Cygni, a luminous yellow-white supergiant at the center of the Northern Cross and the chest of Cygnus.
Sadr is the central hub star where the Northern Cross's arms meet.
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At a glance
- Found in
- Constellations & Star Lore
- Related
- Zubeneschamali, Unukalhai, Albireo, Gacrux
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The story behind Sadr
Sadr’s Arabic-derived proper name means chest, matching the traditional Swan figure.
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The Road of the Sun
Where the twelve signs came from, and why they carry the names they do.
Why Sadr matters
Sadr’s position sits within a complex of bright emission nebulae and dense Milky Way star fields.
How to read Sadr
Trace from Deneb toward Albireo; Sadr marks the midpoint where the crossbar extends to either side.
Sadr in practice: an example
Wide-field photographs reveal the extensive Gamma Cygni Nebula surrounding the line of sight near Sadr.
Where readings of Sadr go wrong
Sadr is foreground to much of the apparent nebulosity and does not illuminate every cloud projected around it.
Sources and editorial method
Research references used for this entry include:
- IAU Division C Working Group on Star Names - Official IAU working group responsible for standardizing star names used in international astronomy.
- CDS SIMBAD Astronomical Database - Professional astronomical database for stellar identifiers, positions, classifications, and bibliography.
- Source
- The Great Almanac Dictionary
- Category
- Constellations & Star Lore
- Last updated
- 2026-09-26
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Common questions
What is Sadr?
Sadr is Gamma Cygni, a luminous yellow-white supergiant at the center of the Northern Cross and the chest of Cygnus.
What does the name Sadr mean?
Sadr’s Arabic-derived proper name means chest, matching the traditional Swan figure.
What do people get wrong about Sadr?
Sadr is foreground to much of the apparent nebulosity and does not illuminate every cloud projected around it.
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