Sadr

37Gam Cyg

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Radiating with an absolute magnitude of −6.52, the greatest intrinsic luminosity of any star treated here, Sadr appears at only apparent magnitude 2.23 because it lies extraordinarily far off — roughly 1,832 light-years, the most remote star in this group. It is a yellow-white F-type star and marks the Gamma position of Cygnus, at the very heart of the Swan where the constellation's cross-shaped figure intersects. Its colour index of 0.673 reflects the intermediate temperature of the F class. Embedded in one of the richest regions of the northern Milky Way, Sadr is a luminous supergiant whose faint appearance testifies chiefly to the immense distance across which its light reaches the Solar System.

물리적 특성

분광형 F Class F — F-type (Yellow-White)
색지수 (B−V) 0.673

관측

겉보기 등급 +2.23
절대 등급 -6.52
거리 1,832 ly
별자리 Cygnus

위치

적경 20h 22.23m
적위 40° 15.40′

Frequently Asked Questions

What type of star is Sadr?
Sadr is a Class F — F-type (Yellow-White) star.
How far is Sadr from Earth?
Sadr is approximately 1,832.3 light-years from Earth.
Can you see Sadr with the naked eye?
With an apparent magnitude of 2.23, Sadr is visible to the naked eye.
What constellation is Sadr in?
Sadr is located in the constellation Cygnus.