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.

الخصائص الفيزيائية

النوع الطيفي F Class F — F-type (Yellow-White)
مؤشر اللون (B−V) 0,673

الرصد

القدر الظاهري +2.23
القدر المطلق -6,52
المسافة 1,832 ly
الكوكبة Cygnus

الموضع

المطلع المستقيم 20h 22,23m
الميل 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.