Pollux

HR 2990 · HIP 37826 · β Gem

👁️ Naked-eye

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

Star

Apparent magnitude: 1.14 mag
Parallax: 96.54 mas → about 33.8 light-years away
Spectral type: K0IIIvar
Surface temperature: 4,892.63 K
Right ascension: 116.329°
Declination: 28.0262°
Designation: HR 2990
Bayer designation: β Gem
HIP number: 37826
IAU name adopted: 2015-12-15
Name language: Greek
Name origin (IAU): This is the classical Latin form of its ancient Greek name Πολυδεύκης, a character in Greek mythology, the twin of Castor (α Gem). Reapplied in Early Modern times.

Constellation

Planets

Light from this object takes about 34 years to reach Earth — the light you see tonight left around AD 1992 (official distance ÷ speed of light).
At magnitude 1.1 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
Declination 28° — 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.