The Pacman Nebula
This is my first narrow band image. It is a bicolor image made from Ha and O-III only. Using a method developed by Steve Cannistra a third channel is generated
by multiplying the pixel values of Ha and O-III. I modified Steve's method slightly and used the square root of the product with both data set normated to [0..1].
Following the HSO pallet Ha was mapped to red, O to blue and the artificial channel to green. After the mapping Ha was used as luminance.
Almost all structure in the image is in the Ha data. The O-III signal is weak and does not show so much structure.
|Other names:||NGC 281, IC 11, Sh2-184|
|Distance:||9200 light years|
|Date:||17-Nov-2018, 14-Feb-2019, 15-Feb-2019, 16-Feb-2019|
|Telescope:||GSO RC8 carbon, TS Optics 65/420 Imaging Star|
|Field of view:||1° 8' x 44'|
|Cameras:||Canon T3i mono mod|
|Filters:||Baader 7nm Ha, Baader 8.5nm O-III|
|Guiding:||ZWO OAG, Lacerta MGen-II|
|Exposure time:||15h 45min|
|Ha ||41 x 15min|
|O-III ||22 x 15min|
|Sizes ||1920 x 1080 |
4974 x 3204|