Celestial hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  Great Nebula in Orion  ·  Horsehead nebula  ·  IC 430  ·  IC 432  ·  IC 434  ·  M 42  ·  M 43  ·  M 78  ·  NGC 1975  ·  NGC 1976  ·  NGC 1977  ·  NGC 1980  ·  NGC 1981  ·  NGC 1982  ·  NGC 1990  ·  NGC 1999  ·  NGC 2023  ·  NGC 2024  ·  NGC 2064  ·  NGC 2067  ·  NGC 2068  ·  NGC 2112  ·  Part of the constellation Orion (Ori)  ·  The star 31Ori  ·  The star 42Ori  ·  The star 49Ori  ·  The star 51Ori  ·  The star Alnilam (εOri)  ·  The star Alnitak (ζOri)  ·  The star Mintaka (δOri)  ·  And 2 more.
Orion Molecular Cloud, Damo
Orion Molecular Cloud
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Orion Molecular Cloud

Orion Molecular Cloud, Damo
Orion Molecular Cloud
Powered byPixInsight

Orion Molecular Cloud

Equipment

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Acquisition details

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Description

The inner portion of the Orion molecular cloud complex, a beautiful example of active ongoing star formation close to home.

I would welcome any CC on this image, I want to improve my acquisition and processing.

Acquisition:

- Canon 70Da (naked sensor)

- Rokinon 135mm f/2 @ f/2.8

- SkyWatcher Star Adventurer

- Astronomik L3 UV/IR clip-in filter

- Manfrotto 055 tripod

- 58 x 45” exposures, manually dithered between exposures, unguided

- Bortle 3 location, FLO owned and operated by RASC Ottawa

Integration: PixInsight

- Flat and Dark: ImageCalibration with Bias

- Lights: ImageCalibration, CosmeticCorrection, SubframeSelector to pick 58 of 82 total subs

- Debayer

- LocalNormalization

- StarAlignment

- ImageIntegration

Processing: PixInsight

- DynamicCrop - to clip uneven edges from dithering

- DynamicBackgroundExtraction - Remove gradient and even out background

- PhotometricColourCalibration - G2V star

- SCNR - Remove green cast

- TGVDenoise - with low contrast inverted lum mask

- MultiscaleMedianTransform - Reduce chrominance and larger scale noise w/ boosted low contrast inverted lum mask

- HistrogramTransformation - Stretch image slightly so histogram peak was 1/8th of the way to the middle

- ACDNR - with low contrast inverted lum mask

- MaskedStretch

- MorphologicalTransformation - 5x5 circular kernel w/star mask, wanted to shrink smaller stars

- LocalHistogramEqualization - Get finer detail back w/ high contrast lum mask

- CurvesTransformation - S curve to lightness, kick saturation up a tiny bit

- SCNR - Minor blue cast removal

- HistogramTransformation - Tweak blackpoint, final brightness

Much of the noise reduction done was modeled after Jon Rista's noise reduction guide

Comments

Sky plot

Sky plot

Histogram

Orion Molecular Cloud, Damo