Dubhe

50Alp UMa

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A yellow-white F-type star with a B–V colour index of 1.061, Dubhe stands out for its warmer tint among the largely blue-white stars of Ursa Major. Designated Alpha Ursae Majoris, it is one of the two Pointer stars of the Plough, whose line directs observers toward Polaris. It shines at apparent magnitude 1.81 from a distance of 123 light-years, and its absolute magnitude of −1.07 indicates a luminosity above the Sun's. A far-northern declination of +61° keeps Dubhe circumpolar across most of the northern hemisphere, a permanent and much-used guidepost of the night sky.

Sifat Fisik

Kelas Spektral F Class F — F-type (Yellow-White)
Indeks Warna (B−V) 1,061

Pengamatan

Magnitudo Semu +1.81
Magnitudo Mutlak -1,07
Jarak 123 ly
Rasi Bintang Ursa Major

Posisi

Asensio Rekta 11h 3,73m
Deklinasi 61° 45,06′

Frequently Asked Questions

What type of star is Dubhe?
Dubhe is a Class F — F-type (Yellow-White) star.
How far is Dubhe from Earth?
Dubhe is approximately 122.9 light-years from Earth.
Can you see Dubhe with the naked eye?
With an apparent magnitude of 1.81, Dubhe is visible to the naked eye.
What constellation is Dubhe in?
Dubhe is located in the constellation Ursa Major.