Adhafera
HR 4031 · HIP 50335 · ζ Leo
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 3.41 mag
- Parallax
- 11.9 mas → about 274.1 light-years away
- Spectral type
- F0III
- Right ascension
- 154.1726°
- Declination
- 23.4173°
- Designation
- HR 4031
- Bayer designation
- ζ Leo
- HIP number
- 50335
- IAU name adopted
- 2016-07-20
- Name language
- Arabic
- Name origin (IAU)
- From the name for the Arabic Almagest period al-dafira, "the Lock of Hair," for the Coma Berenices cluster. Wrongly applied to zeta Leonis in recent times. Yet, misapplications of terms for the "hairy" cluster that is called "Coma" to the mane of the lion can be traced back to (at least) the 17th century.
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 274 years to reach Earth — the light you see tonight left around AD 1752 (official distance ÷ speed of light).
- At magnitude 3.4 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 23.4° — 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.