Gacrux

Gam Cru

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Gacrux glows a distinct red, its B–V colour index of 1.6 among the highest of the bright stars and the visual mark of an M-type classification. Designated Gamma Crucis, it forms the top of the Southern Cross in the constellation Crux and, at 88.6 light-years, is the nearest red star of first magnitude. It appears at magnitude 1.59, and its absolute magnitude of −0.58 shows an intrinsic brightness above the Sun's. From a southern declination of −57° Gacrux stays below the horizon for most northern observers. Its warm colour contrasts sharply with the blue-white glow of the Cross's other members.

Đặc tính vật lý

Phân Loại Quang Phổ M Class M — M-type (Red)
Chỉ số màu (B−V) 1,600

Quan sát

Cấp Sao Biểu Kiến +1.59
Cấp Sao Tuyệt Đối -0,58
Khoảng Cách 88.6 ly
Chòm Sao Crux

Vị trí

Xích kinh 12h 31,17m
Xích vĩ -57° 6,79′

Frequently Asked Questions

What type of star is Gacrux?
Gacrux is a Class M — M-type (Red) star.
How far is Gacrux from Earth?
Gacrux is approximately 88.6 light-years from Earth.
Can you see Gacrux with the naked eye?
With an apparent magnitude of 1.59, Gacrux is visible to the naked eye.
What constellation is Gacrux in?
Gacrux is located in the constellation Crux.