Chalawan
HR 4277 · HIP 53721 · 47 UMa
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 5.03 mag
- Parallax
- 71.11 mas → about 45.9 light-years away
- Spectral type
- G0V
- Surface temperature
- 5,872 K
- Right ascension
- 164.8676°
- Declination
- 40.4301°
- Bayer designation
- 47 UMa
- HIP number
- 53721
- IAU name adopted
- 2015-12-15
- Name language
- Thai
- Name origin (IAU)
- Chalawan is a mythological crocodile king from a Thai folktale.
Source:ESA Hipparcos Catalogue (ESA Gaia Archive) · checked 2026-11-03 ↗NASA Exoplanet Archive (Caltech/IPAC) · checked 2026-11-03 ↗IAU Working Group on Star Names · checked 2026-11-02 ↗
Related
Constellation
Planets
In everyday life
- Light from this object takes about 46 years to reach Earth — the light you see tonight left around AD 1980 (official distance ÷ speed of light).
- At magnitude 5 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 40.4° — 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.