Star cluster
Kronberger 73
Open star cluster · 676 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 | Cygnus |
| Distance | 2,685 pc (8.8 thousand ly) |
| Age | 676 million years |
| Member stars (MWSC) | 18 |
| Reddening E(B−V) | 1.10 |
| Source | MWSC (Kharchenko et al. 2013) |
| Right ascension (J2000) | 20h 13m 46.2s |
| Declination (J2000) | +36° 44′ 56″ |
In the sky
Visible from the whole Northern Hemisphere and south to latitude 53° S. North of latitude 53° N it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 8,757 years ago. At that time the first farming villages were being founded; there was no writing yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 155 million years.