this post was submitted on 26 Dec 2023
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Figured today is an appropriate day to post this. This nebula is also known as NGC 2264 I'm fairly certain the christmas tree is the entire nebula when the photo is inverted, and not just the cone nebula at the very end of it. Captured on November 17th, 2022, from a Bortle 4 zone.
Places where I host my other images:
Flickr | Instagram |
Equipment:
TPO 6" F/4 Imaging Newtonian
Orion Sirius EQ-G
ZWO ASI1600MM-Pro
Skywatcher Quattro Coma Corrector
ZWO EFW 8x1.25"/31mm
Astronomik LRGB+CLS Filters- 31mm
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
Agena 50mm Deluxe Straight-Through Guide Scope
ZWO ASI-290mc for guiding
Moonlite Autofocuser
Acquisition: 4 hours 2 minutes (Camera at half unity gain, -15°C)
L- 62x120"
R- 20x120"
G- 20x120"
B- 19x120"
Ha -47x300" x 2 panels
Darks- 30
Flats- 30 per filter
Capture Software:
PixInsight Processing:
BatchPreProcessing
SubframeSelector
StarAlignment
Blink
ImageIntegration
DrizzleIntegration (2x, Var β=1.5)
Linear:
DynamicCrop
automaticBackgroundExtraction
EZ Decon
NoiseXTerminator
Stretching Luminance:
MaskedStretch to 0.1 background
Starnet++ starmask made, subtracted from 0.3 Gray image and colvolved
Previous image used as a mask to stretch nebulosity without stretching stars
Normal HistogramTransformation
RGB Linear:
Channelcombination to combine monochrome images into RGB image
SpectroPhotometricColorCalibration
SCNR green
HSV Repair
ArcsinhStretch + HT to bring nonlinear
Nonlinear:
LRGBCombination with stretched luminance
Shitloads of CurveTransformations to adjust lightness, saturation, contrast, hues, etc.
Extract L --> LRGBCombination for chrominance noise reduction
More curves
SCNR to remove some background greens
LocalHistogramEqualization
ColorSaturation
even more curves
NoiseXTerminator
EZ Star Reduction
noise generator to add noise back into star reduced areas
MLT for chrominance noise reduction
Resample to 60%
Annotation