Caldwell 66
C66
📋 A written introduction is coming — for now this page shows official values only.
Object
- Type (NASA)
- Globular Cluster
- Distance from Earth
- 100,000 light-years
- Apparent magnitude
- 10.2 mag
- NASA description
- Also known as NGC 5694, Caldwell 66 was discovered by William Herschel in 1784 and is one of the oldest, most remote globular clusters in our galaxy.
Source:NASA Hubble (Messier/Caldwell catalogs) · checked 2026-11-02 ↗
Related
Constellation
In everyday life
- Light from this object takes about 100,000 years to reach Earth — the light you see tonight left 100,000 years ago (official distance ÷ speed of light).
- At magnitude 10.2 it is fainter than the naked-eye limit (about 6) — you need binoculars or a telescope.
- It lies in Hydra — find the constellation first to know where to look.