Adhara

21Eps CMa

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Epsilon Canis Majoris, or Adhara, is the second-brightest star of the constellation Canis Major after Sirius, though it lies far beyond its famous neighbour at about 405 light-years. A blue-white B-type star, it carries a negative B–V index of −0.211 and appears at magnitude 1.5. Its absolute magnitude of −3.97 reveals an intrinsic luminosity many times the Sun's, sustaining its brightness across that distance. From a southern declination of −28° Adhara sits low in the sky for northern observers while riding high through the southern winter, a prominent light beneath the dazzle of Sirius.

คุณสมบัติทางกายภาพ

ประเภทสเปกตรัม B Class B — B-type (Blue-White)
ดัชนีสี (B−V) -0.211

การสังเกต

โชติมาตรปรากฏ +1.50
โชติมาตรสัมบูรณ์ -3.97
ระยะทาง 405 ly
กลุ่มดาว Canis Major

ตำแหน่ง

ไรต์แอสเซนชัน 6h 58.63m
เดคลิเนชัน -28° 58.33′

Frequently Asked Questions

What type of star is Adhara?
Adhara is a Class B — B-type (Blue-White) star.
How far is Adhara from Earth?
Adhara is approximately 405.2 light-years from Earth.
Can you see Adhara with the naked eye?
With an apparent magnitude of 1.50, Adhara is visible to the naked eye.
What constellation is Adhara in?
Adhara is located in the constellation Canis Major.