Tegmine

HR 3208 · HIP 40167 · ζ Cnc

👁️ Naked-eye

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

Star

Apparent magnitude: 4.67 mag
Parallax: 39.87 mas → about 81.8 light-years away
Spectral type: G0V
Right ascension: 123.053°
Declination: 17.6481°
Bayer designation: ζ Cnc
HIP number: 40167
IAU name adopted: 2016-09-12
Name language: Latin
Name origin (IAU): A Latin word in the ablative case meaning "covering" or "shell" (nominative case would be "tegmen"), used in a Early Modern discussion of the constellation Cancer. The word was subsequently applied as a star name to ζ Cnc.

Constellation

Light from this object takes about 82 years to reach Earth — the light you see tonight left around AD 1944 (official distance ÷ speed of light).
At magnitude 4.7 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
Declination 17.6° — 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.