Celestial hemisphere:  Northern  ·  Constellation: Auriga (Aur)  ·  Contains:  IC 417  ·  NGC 1893  ·  NGC 1931  ·  The star φAur
IC 410 - Tadpoles Nebula, IC 417 - The Spider Nebula, & NGC 1931 - The Fly Nebula, robo9981
IC 410 - Tadpoles Nebula, IC 417 - The Spider Nebula, & NGC 1931 - The Fly Nebula
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IC 410 - Tadpoles Nebula, IC 417 - The Spider Nebula, & NGC 1931 - The Fly Nebula

IC 410 - Tadpoles Nebula, IC 417 - The Spider Nebula, & NGC 1931 - The Fly Nebula, robo9981
IC 410 - Tadpoles Nebula, IC 417 - The Spider Nebula, & NGC 1931 - The Fly Nebula
Powered byPixInsight

IC 410 - Tadpoles Nebula, IC 417 - The Spider Nebula, & NGC 1931 - The Fly Nebula

Equipment

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Acquisition details

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Description

IC 410 - Tadpoles Nebula, IC 417 - The Spider Nebula, & NGC 1931 - The Fly Nebula

A widefield view of three bright nebulas in Auriga.

L - 89x60s

R - 30x60s

G - 30x60s

B - 29x60s

Ha - 64x200s

Total Time: 7 hours

L and RGB data was acquired at a B4 site and Ha data was acquired in my B7 backyard.

All channels were preprocessed in PI using WBPP. Darks & Flats were used for calibration. Each channel was then weighted using SubframeSelector, aligned using StarAlignment, integrated with ImageIntegration, and drizzled with DrizzleIntegration.

Each channel was then aligned to each other and cropped to a standard FOV to remove edges.

Post Processing

Ha

1. DBE

2. Deconvolution (External PSF, 30 iterations, deringing with an inverted L mask)

3. EZDenoise (TGVOnly)

4. LinearFit to R channel

L

1. DBE

2. EZDenoise (TGVOnly)

3. LinearFit to R channel

BlendedLuminance

1. Created with PixelMath using 0.7*Ha + 0.3*L

2. EZSoftStretch

3. LocalHistogramEqualization with a star mask to protect stars (Radius 512, Contrast 2.0, Amount 0.1)

R/G/B

1. DBE on each channel

2. LinearFit to R

3. Blended with Ha channel using PixelMath (R =0.7*Ha +0.3*R, G=0.1*Ha+0.9*G, B=0.1*Ha+0.9*B)

4. ChannelCombination to make RGB image

5. BackgroundNeutralization

6. PhotometricColorCalibration

7. EZDenoise (TGV + MMT)

8. EZSoftStretch

9. LRGBCombination with BlendedLuminance

10. EZStarReduction

11. Curves for saturation and contrast

12. Light TGVDenoise with low contrast mask to smooth things out

13. MMT Denoise on layer 5 luminance with inverted L mask to smooth out background

14. More curves for color + final tweaks.

Comments

Sky plot

Sky plot

Histogram

IC 410 - Tadpoles Nebula, IC 417 - The Spider Nebula, & NGC 1931 - The Fly Nebula, robo9981