The Elephant's Trunk Nebula is a concentration of interstellar gas and dust within the much larger ionized gas region IC 1396 located in the constellation Cepheus about 2,400 light years away from Earth. The Elephant's Trunk Nebula is now thought to be a site of star formation, containing several very young (less than 100,000 yr) stars that were discovered in infrared images in 2003. The combined action of the light from the massive star ionizing and compressing the rim of the cloud, and the wind from the young stars shifting gas from the center outward lead to very high compression in the Elephant's Trunk Nebula. This pressure has triggered the current generation of protostars.
[
https://en.wikipedia.org/wiki/Elephant%27s_Trunk_Nebula]
Crop from the original widefield:
IC1396A - The Elephant's Trunk
Processing GuidePre-ProcessingImage Calibration
Cosmetic Correction
Subframe Selector
Star Alignment
Local Normalization
Integration
Linear Processing (Ha)Automatic Background Extractor
TGV Denoise
Multiscale Median Transform
Deconvolution
Histogram Transformation (STF Stretch)
Linear Processing (OIII & SII)Automatic Background Extractor
TGV Denoise
Multiscale Median Transform
Histogram Transformation (STF Stretch)
Non-Linear Processing (Custom SHO)Pixel Math (R = Ha*0.33 + SII*0.67, G = Ha*0.40 + OIII*0.60, B = Ha*0.05 + OIII*0.95)
LRGB Combination (Ha, Lightness = 0.400, Saturation = 0.500)
StarNet2
Non-Linear Processing (Custom SHO_Starless)Curves Transformation (Contrast, Hue, & Saturation)
Histogram Transformation
Unsharp Mask
Non-Linear Processing (Custom SHO_Stars)SCNR (Red, 0.25)
Morphological Transformation (Erosion)
SCNR (Red, 0.50)
Non-Linear Processing (Custom SHO)Pixel Math (Custom_SHO_Starless + Custom_SHO_Stars)
Automatic Background Extractor
Curves Transformation (Contract, Hue, & Saturation)
Invert
SCNR (Green, 0.60)
Invert
Local Histogram Equalization
Dynamic Crop
ACDNR
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