Star cluster
NGC 2287
Open star cluster · 178 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 | Canis Major |
| Distance | 769 pc (2.5 thousand ly) |
| Age | 178 million years |
| Member stars (MWSC) | 302 |
| Reddening E(B−V) | 0.06 |
| Metallicity [Fe/H] | 0.04 |
| Source | MWSC (Kharchenko et al. 2013) |
| Right ascension (J2000) | 6h 46m 03.0s |
| Declination (J2000) | −20° 44′ 42″ |
In the sky
Visible from the whole Southern Hemisphere and north to latitude 69° N. South of latitude 69° S it never sets. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around 483 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 44 million years.