The globular cluster M13 in the constellation Hercules is one of the brightest and most well-known globular clusters in the northern sky. It is a massive, nearly spherical swarm of hundreds of thousands of stars bound together by gravity. M13 is also one of the oldest objects in the Milky Way, which is why its overall appearance has a slightly warm tone — the cluster is dominated by ancient stars.
This image also captures objects across dramatically different distance scales. The orange star HD 150998 is located roughly one thousand light-years from Earth, while M13 itself lies about 25 thousand light-years away. The small galaxy NGC 6207 visible to the right is much farther still, at a distance of tens of millions of light-years.
| Camera | ZWO ASI2600MC |
| Optics | Askar 103 APO |
| Mount | UMi 17S |
| Gain | 0 |
| Sensor Temperature | –10 °C |
| F-ratio | f/7 |
| Exposure | 433 × 30 s |
| Total Integration | 3.6 h |
| Processing | Siril, GraXpert, Affinity |
Annotated
