Messier 57 (Daniel.P)

Celestial hemisphere: Northern · Constellation: Lyra (Lyr) · Contains: IC 1296 · M 57 · NGC 6720 · Ring nebula in Lyra

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Messier 57

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Messier 57

The B version is a zoom on the ing Nebulae with deconvolution applied.

Picture taken over 2 nights at two different focal length :

- 8 april : using the 0.7x focal reducer :10 x 240s

- 9 april at FD=10 ; 29 x 240 s

The frames at FD = 10 are not background limited : the read out noise is dominant.

The two pictures where processed separatly as follows :

Pre-processing done in Pixinsight :

- overscan area offset correction

- bias correction

- flat correction

- hot pixel correction

- debayer

- registration

- stack

Processing done in Pixinsight :

- color calibration using stars

- residual sky background substraction

Then the two resulting images where

- aligned using the FD=10 one as reference

- added using pixelmath

- converted to non linear image

- the nebulae was corrected using curves transformation

- color sat applied

- blue adjusted

Final image :

- jpeg calibration done in Mac Photo

Original
Final
B

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Distribution of astrophotographers

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	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 success
Started	...
Astrometry.net job	1130068
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Messier 57

Messier 57

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Image Index:

Contribution Index (beta):

Messier 57

Messier 57

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

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