Caldwell 12
C12
📋 A written introduction is coming — for now this page shows official values only.
Object
- Type (NASA)
- Spiral Galaxy
- Distance from Earth
- 15,000,000 light-years
- Apparent magnitude
- 9.7 mag
- NASA description
- This majestic spiral has had ten observed supernovae in its spiral arms since 1917.
Source:NASA Hubble (Messier/Caldwell catalogs) · checked 2026-11-02 ↗
In everyday life
- Light from this object takes about 15,000,000 years to reach Earth — the light you see tonight left 15,000,000 years ago (official distance ÷ speed of light).
- At magnitude 9.7 it is fainter than the naked-eye limit (about 6) — you need binoculars or a telescope.
- Caldwell number 12 — guides call it «C12» (NASA Hubble Caldwell catalog).