NGC 457 - Open Cluster in Cassiopeia
|
NGC 457 is a relatively young (i.e., approximately 21 million years old) open star cluster that was first discovered by William Hershel in 1787. It is ofter referred to as the Owl Cluster or ET cluster because of its resemblance to those figures. |
|
| Telescope: | Celestron 11 in. Edge HD @ f/7 |
| Mount: | iOptron 60CEM |
| Guiding: | SX Lodestar on ONAG |
| Camera: | Canon EOS 650D (ISO setting of 800) |
| Exposures: | 6 @ 5 min. |
| Procesing:: | Images were focused, calibrated, aligned, and combined (MinMaxExAvg) in ImagesPlus. The image was then slightly cropped and adjusted (Level, Curves) back in Photoshop. Grain Surgery was applied (with some sharpening). |
| Back to Index | |