Zosma
HR 4357 · HIP 54872 · δ Leo
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 2.53 mag
- Parallax
- 55.82 mas → about 58.4 light-years away
- Spectral type
- A4V
- Right ascension
- 168.5271°
- Declination
- 20.5237°
- Designation
- HR 4357
- Bayer designation
- δ Leo
- HIP number
- 54872
- IAU name adopted
- 2016-07-20
- Name language
- Greek
- Name origin (IAU)
- From the Greek word ζῶσμα, "girdle" or "loin cloth". In Early Modern times this word was erroneously said to have been used to describe δ Leo in a medieval Greek text. Correctly, the text has ὀσφῦς, "hip" or "lower back" (after Ptolemy). The name "Zosma" (transliterated from the erroneous Greek word) was applied 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 58 years to reach Earth — the light you see tonight left around AD 1968 (official distance ÷ speed of light).
- At magnitude 2.5 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 20.5° — 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.