Jiu
HR 8430 · HIP 109176 · ι Peg
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 3.77 mag
- Parallax
- 85.28 mas → about 38.2 light-years away
- Spectral type
- F5V
- Right ascension
- 331.7528°
- Declination
- 25.3451°
- Designation
- HR 8430
- Bayer designation
- ι Peg
- HIP number
- 109176
- IAU name adopted
- 2026-08-13
- Name language
- Chinese
- Name origin (IAU)
- Jiù (Mortar, 臼) and Nèichŭ (Inner Pestle, 內杵) are a Chinese super-constellation attested since Han Dynasty.
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 38 years to reach Earth — the light you see tonight left around AD 1988 (official distance ÷ speed of light).
- At magnitude 3.8 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 25.3° — 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.