23 Oct 2021
This is an image of M4. It is a globular cluster about 5,500 light years away in the constellation Scorpius. It is the closest globular cluster to earth.
M4
5 credit
Filter | Avg Exp (s) | Total Exposure | Subframes |
|---|---|---|---|
| Luminance | 300 | 1h25m | 17 |
| Red | 300 | 1h25m | 17 |
| Green | 282 | 1h20m | 17 |
| Blue | 319 | 1h25m | 16 |