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NGC 4631 (Whale Galaxy) & NGC 4656-7 (Hockey Stick Galaxies)
NGC 4631 (also known as the Whale Galaxy or Caldwell 32) is an edge-on spiral galaxy in the constellation Canes Venatici. NGC 4656 and NGC 4657 are a pair of interacting galaxies, sometimes informally called the Hockey Stick Galaxies or the Crowbar Galaxy.These three galaxies are members of the not very well defined NGC 4631 Group.
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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 = 60 min, R = 30 min; G = 30 min; B = 30 min. |
| Subexposures: | 10 minutes |
| Acquisition: | CCD Soft |
| Processing: | PixInsight, Photoshop CS |