Acamar
* tet Eri · HIP 13847 · θ1 Eri
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 3.18 mag
- Parallax
- 20.23 mas → about 161.2 light-years away
- Spectral type
- A4III+...
- Right ascension
- 44.5653°
- Declination
- -40.3047°
- Designation
- * tet Eri
- Bayer designation
- θ1 Eri
- HIP number
- 13847
- IAU name adopted
- 2016-07-20
- Name language
- Arabic
- Name origin (IAU)
- From its name for the Arabic Almagest period akhir al-nahr, "the River's End". Applied in medieval times, and reapplied in recent times
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 161 years to reach Earth — the light you see tonight left around AD 1865 (official distance ÷ speed of light).
- At magnitude 3.2 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination -40.3° — 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.