C23
Silver Sliver Galaxy
Subs (3hrs 41m)
L 98 frames 1hrs 39m
R 29 frames 0hrs 33m
G 46 frames 0hrs 46m
B 43 frames 0hrs 43m
Pixinsight
Graxpert on all
Blur ext on all
LRGB combination on RGB
Star ext combined image and luminance
GHS on both images
Range mask on combined image
Curves for saturation and reverse mask for background
Colour saturation to lift HA
LRGB combination to add luminance back in.
Stars
SetiAstro Star Stretch
Add stars back
Lightroom
No Adjustments
Info
C23
Caldwell 23 (NGC 891), an edge-on unbarred spiral galaxy located in the constellation Andromeda. It is also known by nicknames such as the "Silver Sliver Galaxy" or the "Outer Limits Galaxy"
- Location and Distance: Located in the constellation Andromeda, Caldwell 23 is approximately 30 million light-years from Earth.
- Appearance: Viewed edge-on, the galaxy shows a prominent dust lane.
- Size: It is estimated to span 100,000 to 120,000 light-years and contain around 500 billion stars.
- Discovery: William Herschel discovered it on October 6, 1784.
greg.lynes
