NGC6888 Crescent Nebula – LR(+Ha)GB
NGC6888 LRGB image, with Red channel enhanced by H-Alpha.
Exposure
Luminance: 180 min
H-Alpha enhancing red: 160 min
Red: 180 min
Green: 120 min
Blue: 180 min
H-Alpha enhancing red: 160 min
Red: 180 min
Green: 120 min
Blue: 180 min
unbinned. 0.7 "/pixel
unbinned. 0.7 "/pixel
binned 2 × 2. 1.4 "/pixel
binned 2 × 2. 1.4 "/pixel
binned 2 × 2. 1.4 "/pixel
unbinned. 0.7 "/pixel
binned 2 × 2. 1.4 "/pixel
binned 2 × 2. 1.4 "/pixel
binned 2 × 2. 1.4 "/pixel
Camera
QSI583wsg
3348 × 257 pixels of 5.4 µm
Telescope
AT8RC
1625mm, f/8
Mount
Losmandy G11
Guiding
Lodestar
Processing
24 darks
16 flats per filter
CCDStack
Photoshop
16 flats per filter
CCDStack
Photoshop
Median combine