Star cluster
NGC 206
Andromeda's giant star cloud
An OB star cloud 4,000 light-years across in Andromeda's south-western spiral arm; the richest young stellar association in the Local Group. Even a small telescope shows it as a bright patch in the disc of M31.
| Type | Star cluster |
|---|---|
| Constellation | Andromeda |
| Host galaxy | Andromeda (M31) |
| Distance | 765 kpc (M31) |
| Diameter | ~4,000 light-years |
| Age | ~10–50 million years |
| Right ascension (J2000) | 0h 40m 24.0s |
| Declination (J2000) | +40° 43′ 48″ |
In the sky
Visible from the whole Northern Hemisphere and south to latitude 49° S. North of latitude 49° N it never sets. It stands highest at midnight in September, the best time to observe it.