Saiph

HR 2004 · HIP 27366 · κ Ori

👁️ Naked-eye

📋 A written introduction is coming — for now this page shows official values only.

Star

Apparent magnitude: 2.06 mag
Parallax: 5.04 mas → about 647.1 light-years away
Spectral type: B0.5Iavar
Right ascension: 86.9391°
Declination: -9.6696°
Designation: HR 2004
Bayer designation: κ Ori
HIP number: 27366
IAU name adopted: 2016-07-20
Name language: Arabic
Name origin (IAU): From an abbreviation of the Arabic asterism name saif al-jabbar, the Giant's Sword," for η, c, θ, and ι Ori. Wrongly applied as a star name to κ Ori in recent times.

Constellation

Light from this object takes about 647 years to reach Earth — the light you see tonight left around AD 1379 (official distance ÷ speed of light).
At magnitude 2.1 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
Declination -9.7° — it rises above the horizon in Seoul (37.6° N), so it is visible from Korea in the right season.

Worked out from this object's official values.