Diadem
* alf Com · HIP 64241 · α Com
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 4.32 mag
- Parallax
- 56.1 mas → about 58.1 light-years away
- Spectral type
- F5V
- Right ascension
- 197.497°
- Declination
- 17.5295°
- Designation
- * alf Com
- Bayer designation
- α Com
- HIP number
- 64241
- IAU name adopted
- 2017-02-01
- Name language
- Contemporary
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 4.3 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 17.5° — 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.