Star cluster
BDSB 15
Open star cluster · 389 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 | Vulpecula |
| Distance | 2,743 pc (8.9 thousand ly) |
| Age | 389 million years |
| Member stars (MWSC) | 29 |
| Reddening E(B−V) | 1.27 |
| Source | MWSC (Kharchenko et al. 2013) |
| Right ascension (J2000) | 19h 49m 12.4s |
| Declination (J2000) | +26° 50′ 06″ |
In the sky
Visible from the whole Northern Hemisphere and south to latitude 63° S. North of latitude 63° 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 8,947 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 159 million years.