~4h total
UV/IR cut
Columbus, OH · Bortle 5
UV/IR cut
Columbus, OH · Bortle 5
The target
300,000 stars packed into a sphere 145 light-years across. The core is dense enough that individual stars blur together at anything less than excellent seeing.
Processing
- Stacked in PixInsight (WBPP) with calibration frames
- BlurXTerminator deconvolution
- NoiseXTerminator noise reduction
Acquisition
| Type | Globular cluster |
| Constellation | Hercules |
| Distance | 22,200 ly |
| Apparent magnitude | +5.8 |
| Apparent size | 20' |
| Integration | ~4h |
| Palette | Broadband |
| Filters | UV/IR cut |
| Shot | Jun 2025 |
| From | Columbus, OH · Bortle 5 |
Equipment
| Telescope | 3D-printed 114mm f/4 Newtonian astrograph |
| Camera | ASI533MC Pro |
| Mount | Proxisky Umis20s |
| Filters | UV/IR cut |
| Guiding | SVBony 60mm guide scope · 22mm mini guide cam · PHD2 |