Algedi
HR 7754 · HIP 100064 · α2 Cap
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 3.58 mag
- Parallax
- 30.82 mas → about 105.8 light-years away
- Spectral type
- G6/G8III
- Right ascension
- 304.5136°
- Declination
- -12.5449°
- Designation
- HR 7754
- Bayer designation
- α2 Cap
- HIP number
- 100064
- IAU name adopted
- 2016-08-21
- Name language
- Arabic
- Name origin (IAU)
- Reapplied in recent times (from its older medieval spelling), from the scientific Arabic constellation name al-jady, "the Kid," for Capricornus.
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 106 years to reach Earth — the light you see tonight left around AD 1920 (official distance ÷ speed of light).
- At magnitude 3.6 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination -12.5° — 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.