Propus
HR 2216 · HIP 29655 · η Gem
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 3.28 mag
- Parallax
- 8.48 mas → about 384.6 light-years away
- Spectral type
- M3III
- Right ascension
- 93.7194°
- Declination
- 22.5068°
- Designation
- HR 2216
- Bayer designation
- η Gem
- HIP number
- 29655
- IAU name adopted
- 2016-07-20
- Name language
- Greek
- Name origin (IAU)
- Applied in Early Modern times from the Greek word πρόπους, "forward foot", used by Ptolemy in the Almagest in describing this star.
Source:IAU Working Group on Star Names · checked 2026-11-02 ↗ESA Hipparcos Catalogue (ESA Gaia Archive) · checked 2026-11-03 ↗
Related
Constellation
In everyday life
- Light from this object takes about 385 years to reach Earth — the light you see tonight left around AD 1641 (official distance ÷ speed of light).
- At magnitude 3.3 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 22.5° — 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.