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M 7 (Ptolemy Cluster)
M 7 (also designated NGC 6475, or Ptolemy Cluster is an open cluster of stars in the constellation of Scorpius.
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Technical Details: |
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| Optics: | ASA N 12 Astrograph at /6.8 |
| Mount: | ASA DDM 85 |
| Camera: | SBIG STL-11000M |
| Filters: | Astronomik LRGB filter set |
| Dates/Times: | 24 April 2012 |
| Location: | Rozhen |
| Exposure Details: | L = 10 min, R = 10 min; G = 10 min; B = 10 min. |
| Subexposures: | 2 minutes |
| Acquisition: | CCD Soft |
| Processing: | PixInsight, Photoshop CS |