| Object: | M 2 |
| Date: | 2009-09-[24,25] |
| Scope, mount, camera: | 12.5" Newtonian, f/5.1, MAM50, ST-10XME |
| Filter, exposure time: | L = 20*180s, RGB = (12x13x12)*300s |
| Total exposure time: | 4h05min |
| Location: | La Palma, Roque de los muchachos |
| Comments: | Data reduction with THELI, colour composition in PS. Resampled from 0.85"/pixel to 0.65"/pixel. Image seeing 1.70". North is right and East is up. SDSS ugr colour calibration. |