Star cluster
Ruprecht 108
Open star cluster · 479 million years
An open cluster of stars born together from the same gas cloud in the Milky Way’s disc; the Galaxy’s tidal forces will disperse it within a few hundred million years. Position, distance, age and member count come from the MWSC catalogue; the total brightness is roughly estimated from the member count.
| Type | Star cluster |
|---|---|
| Constellation | Centaurus |
| Distance | 935 pc (3.0 thousand ly) |
| Age | 479 million years |
| Member stars (MWSC) | 144 |
| Reddening E(B−V) | 0.14 |
| Source | MWSC (Kharchenko et al. 2013) |
| Right ascension (J2000) | 13h 32m 13.2s |
| Declination (J2000) | −58° 27′ 54″ |
In the sky
Visible from the whole Southern Hemisphere and north to latitude 32° N. South of latitude 32° S it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around 1025 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 54 million years.