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

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

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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

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.

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape
Artificial satellite

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic success
Started	...
PixInsight job	n/a
PixInsight queue size	n/a
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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

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Image Index:

Contribution Index (beta):

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

Equipment

Acquisition details

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