NGC 4565 (Daniel.P)

Celestial hemisphere: Northern · Constellation: Coma Berenices (Com) · Contains: IC 3546 · IC 3571 · IC 3582 · NGC 4562 · NGC 4565

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NGC 4565

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NGC 4565

Spring session under dark sky before moon rise : SQM 21.4 at zenith.

Unable start AO (mounted) probably one motor stuck in limit position. Will need to unjam it.

I have also combined data from 2014 data from May 2017.

The result is displayed in version Original & Final resulting in nearly 11 hours of exposure.

The B version is picture from 2017 data only.

Both have been processed the same way.

Version C is an animated version of A and B.

I have tried to scale both images so the noise is similar.

It can be noted the "combined" version have more signal/noise, but that it is less sharp as it suffer from less round stars and also the shorter focal length (F/D=7) from 2014 data.

Pre-processing done in Pixinsight :

- overscan area offset correction

- bias correction

- hot pixel correction

- debayer

- registration

- stack

Processing done in Pixinsight :

- backgroung color neutralisation

- color calibration using galaxy

- sky background removal (DBE in PI)

- slight deconvolution (masked)

- non linear image creation

- color saturation boost masked

- green neutral

- TGV denoise

- slight HDR

Final image :

- jpeg calibration done in Mac Photo (levels adjust and further saturation boost and color balance)

Original
B
Final
C

B

Description: B version is with May 2017 data only

Uploaded: ...

C

Description: Animation

Uploaded: ...

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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
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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
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Star trails
Northern lights
Noctilucent clouds
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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	Advanced success
Started	...
Astrometry.net job	1561460
PixInsight job	SYUKP8V563K4QAIRNCQTM7KRRIHKZMW1
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	12h36m18s.418
RA (top/left)	12h35m09s.291
RA (top/right)	12h35m45s.342
RA (bottom/right)	12h37m27s.835
RA (bottom/left)	12h36m51s.319

Dec (center)	+26°00′02″.20
Dec (top/left)	+25°45′28″.39
Dec (top/right)	+26°19′59″.28
Dec (bottom/right)	+26°14′33″.47
Dec (bottom/left)	+25°40′04″.33

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NGC 4565

NGC 4565

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Image Index:

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NGC 4565

NGC 4565

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C

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