M101 - Comparison digital camera/CMOS/Hubble & Subaru - High definition (Vincent F)

M101 - Comparison digital camera/CMOS/Hubble & Subaru - High definition

First, with a D5600 in 2017, 31 subs - 4 minutes, not a good focus, not a good collimation.

One year later, same place, always a Newton 200/800 (Lacerta this time vs Skywatcher before), ZWO 1600, motorized focuser, good focus, good collimation but some tilt.

I did the same traitment for the two.

Now it's the end with bad colors balance, I used the photometric calibration of Pixinsight, agreat tool!

And for the fun, comparison with Hubble & Subaru pictures.

I just have a problem with high HA signal: for exemple in the left, you can see a bright bluish nebulosity and think should be red seing the HA layer and Subaru picture.

I use different techniques (NRGB, non linear, linear, pixelmaths, linearfit etc) nothing work, can you help me if I send you data layers?

Original
D
E
F
Final
H

D

Description: APN version

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E

Description: Little comparison
In order: digital camera, CMOS, Hubble (left), Hubble/Subaru (right)

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F

Description: Luminance processed

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Imaged with APT

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

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 failed
Started	...
Astrometry.net job	2557138
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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