Unukalhai
HR 5854 · HIP 77070 · α Ser
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 2.63 mag
- Parallax
- 44.1 mas → about 74 light-years away
- Spectral type
- K2III
- Right ascension
- 236.067°
- Declination
- 6.4256°
- Designation
- HR 5854
- Bayer designation
- α Ser
- HIP number
- 77070
- IAU name adopted
- 2016-08-21
- Name language
- Arabic
- Name origin (IAU)
- Applied in recent times from its name for the Arabic Almagest period 'unuq al-hayya, "the Serpent's Neck."
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 74 years to reach Earth — the light you see tonight left around AD 1952 (official distance ÷ speed of light).
- At magnitude 2.6 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 6.4° — 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.