Saiph

53Kap Ori

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Intrinsically among the most luminous stars in this group, with an absolute magnitude of −4.42, Saiph appears at only apparent magnitude 2.07 because it lies far off, some 647 light-years away. It is a hot blue-white B-type star, its colour index of −0.168 signalling a high surface temperature. Saiph carries the Kappa designation in Orion and marks one of the corners of that constellation's prominent rectangular figure. Despite ranking below Orion's brighter luminaries in Earth's sky, its great distance conceals a genuinely powerful star, its apparent faintness relative to nearby Rigel a consequence of geometry rather than any lack of intrinsic brilliance.

คุณสมบัติทางกายภาพ

ประเภทสเปกตรัม B Class B — B-type (Blue-White)
ดัชนีสี (B−V) -0.168

การสังเกต

โชติมาตรปรากฏ +2.07
โชติมาตรสัมบูรณ์ -4.42
ระยะทาง 647 ly
กลุ่มดาว Orion

ตำแหน่ง

ไรต์แอสเซนชัน 5h 47.76m
เดคลิเนชัน -9° 40.18′

Frequently Asked Questions

What type of star is Saiph?
Saiph is a Class B — B-type (Blue-White) star.
How far is Saiph from Earth?
Saiph is approximately 647.1 light-years from Earth.
Can you see Saiph with the naked eye?
With an apparent magnitude of 2.07, Saiph is visible to the naked eye.
What constellation is Saiph in?
Saiph is located in the constellation Orion.