サイフ

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.

物理的特性

スペクトル型 B Class B — B-type (Blue-White)
色指数 (B−V) -0.168

観測

見かけの等級 +2.07
絶対等級 -4.42
距離 647 ly
星座 Orion

位置

赤経 5h 47.76m
赤緯 -9° 40.18′

Frequently Asked Questions

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