Messier 2 is a globular cluster located in constellation Aquarius and it’s approximately 37’000 light-year away from Earth. It’s one of the biggest known globular cluster, because it contains approximately 150 000 stars and it has 175 light-years in diameter. After Crab Nebula M1, this cluster is the second object of Messier’s catalogue of deep space objects.
This picture was the second captured object (after M71) during one night and it’s an integration of 3 hours of exposure.
Technical details:
| Telescope | Newton 254/1000 mm |
| Aperture | 254 mm |
| Focal length | 950 mm |
| Mount | Gemini G53f |
| Autoguiding | ZWO 174MM, TS 60/240 mm |
| Camera | ZWO 071 Pro @-15C |
| Corrector | TS-Optics 2" 3-element MaxField |
| Filters | Hutech IDAS LPS-D2 |
| Exposure | 60x180s, Gain 94, bin 1x1, |
| Date | 2018-10-04 |