IC443, The Jellyfish Nebula, HSO and RGB (AnaTa)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: 12 Gem · 7 Gem) · 7 eta Gem · Gem A · HD254755 · HD43078 · HD43385 · HD43479 · HD43582 · HD43703 · HD43753 · HD43907 · HD43966 · IC 443 · IC 444 · LBN 840 · LBN 844 · LDN 1564 · Praepes (η Gem · Sh2-248 · Tejat Prior · The star 12 Gem · The star Propus

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IC443, The Jellyfish Nebula, HSO and RGB

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IC443, The Jellyfish Nebula, HSO and RGB

One year on AstroBin and 1 year 4 months of experience!

IC443 Nebula RGB was used for annotation and captured during about 40 min. Main image is HSO and has combined HSO SNR of about 70.
Panel A: HSO
Panel B: RGB annotation

Processing:
R, G, B, Ha, Oiii and Sii were cropped.
GraXpert beta version was used to remove background.
RGB are combined.
DBE again for RGB.
Color Colib for RGB
Blur and Noise XT for Ha, O3, S2 and RGB
Star XT for RGB. RGB stars were kept.
Manual stretching (with HT) for Ha, O3, S2, RGB (no stars), and RGB-stars (two different stretching: dimmer and brighter stars).

1. Processing (panels B)
RGB no stars were masked by Lum.
Local Histogram Equalization: Kernel radius of 40 and 150
Multiscale-median transform for sharpness; strong 0.4-0.5 setting.
Curves: saturation and brightness were manipulated
Mask off.
Added saturated RGB stars (brighter star version).
Annotation

1. Processing (panel A)
Combined HSO as R-G-B
Star XT
Noise XT
Stretched again.
Lum for HSO was used as mask.
Curves: played with Hue-Saturation until final image.
Local Histogram Equalization: Kernel radius of 40, 150 and then 300 (histogram resolution is 10-bit!)
Multiscale-median transform for sharpness; strong 0.3-0.4 setting.
Curves again: saturation and brightness were manipulated
Blue and red were separately manipulating using "blue mask" and "red mask" scripts.
Mask off.
Added RGB stars (dimmer stars).
Done

Original
Final
B

Nebulas (Emission)

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	Distinct awarded users	Total awarded images
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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
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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	Advanced success
Started	...
Astrometry.net job	8811447
PixInsight job	70WEL6PPY5EK5327J25OTYXVDQX7GYNC
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h17m26s.32
RA (top/left)	06h20m37s.83
RA (top/right)	06h14m12s.64
RA (bottom/right)	06h14m16s.75
RA (bottom/left)	06h20m37s.87

Dec (center)	+22°41′29″.2
Dec (top/left)	+23°25′46″.10
Dec (top/right)	+23°25′19″.1
Dec (bottom/right)	+21°56′57″.2
Dec (bottom/left)	+21°57′25″.9

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IC443, The Jellyfish Nebula, HSO and RGB

IC443, The Jellyfish Nebula, HSO and RGB

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Image Index:

Contribution Index (beta):

IC443, The Jellyfish Nebula, HSO and RGB

IC443, The Jellyfish Nebula, HSO and RGB

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these collections

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