Cursa

HR 1666 · HIP 23875 · β Eri

👁️ Naked-eye

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

Star

Apparent magnitude: 2.79 mag
Parallax: 36.5 mas → about 89.4 light-years away
Spectral type: A3IIIvar
Right ascension: 76.9624°
Declination: -5.0865°
Designation: HR 1666
Bayer designation: β Eri
HIP number: 23875
IAU name adopted: 2016-07-20
Name language: Arabic
Name origin (IAU): Applied in recent times from an abbreviation of the pre-Islamic Arabian asterism name kursiy al-jauza' al-muqaddam, "the Foremost footstool of aljauza' [today's Orion]," for λ, β and ψ Eri, and τ Ori.

Constellation

Light from this object takes about 89 years to reach Earth — the light you see tonight left around AD 1937 (official distance ÷ speed of light).
At magnitude 2.8 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
Declination -5.1° — 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.