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M 55
Messier 55 (also known as NGC 6809) is a globular cluster in the constellation Sagittarius. It is at a distance of about 17,600 light-years away from Earth. |
Technical Details: |
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| Optics: | ASA N 12 Astrograph at /3.6 |
| Mount: | ASA DDM 85 |
| Camera: | SBIG STL-11000M |
| Filters: | Astronomik RGB filter set |
| Dates/Times: | 21 July 2012 |
| Location: | Rozhen |
| Exposure Details: | R,G B = 10 min. each |
| Subexposures: | 2 minutes |
| Acquisition: | CCD Soft |
| Processing: | PixInsight, Photoshop CS |