Simeis 57 (Propeller Nebula) (Herwig Peresson)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg)

Simeis 57 (Propeller Nebula), Herwig Peresson

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Simeis 57 (Propeller Nebula)

Powered byPixInsight

Simeis 57 (Propeller Nebula)

The Propeller Nebula (Simeis 57), also catalogued as DWB 111, 118 and 119, is part of the large emission nebula complex Cygnus X in the constellation Cygnus.

Taken with my sweet little Skywatcher 130/650 PDS Newton; Ha enhanced RGB image using mainly Pixinsight. Some older Ha data are reused and added from the 72/432 ED.

-- Processing Sequence --

LUMINANCE

Integrate all channels (R, G, B, Ha_130PDS, Ha_Lacerta71) noise eval.

Denoise: MultiscaleLinearTransform using Lightness Mask

Denoise: MultiscaleMedianTransform using Lightness mask (0.3 amount)

Deconvolute using created Gausian PSF

DBE with points on dark background - reduced by 50% (averaged with original)

MaskedStretch script

Morphological Transform using StarMask (slightly to reduce star size)

Stretch with ExponentialTransformation (tick Lightness mask)

Stretch with LocalHistogramTransformation

Stretch with HistogramTransformation

DarkStructureEnhance script - reduced by 50% (averaged with original)

Denoise: ANCDR using lightness Mask, mild (amount 0.2)

Reenhanced bright stars and spikes with PixelMath Blend (max) with Lum made w/o Lacerta71 Ha data

RGB PROCESSING

DBE of RGB channels

LinearFit

RGB ChannelCombine

MaskedStretch

HistrogramStretch

HaRVB-AIP script (Merge Ha with RGB)

Strong Denoise HaRGB with MultiscaleMedianTransform (smooth color info)

MorphologicalTransformation (Remove single dark pixels; Morphological Median, 3x3)

LRVB-AIP script (Merge Luminance with HaRGB; Lightness 0.590 / Saturation 0.4)

HistogramTransformation

Photoshop: Merge two different versions (one with tighter and bigger stars); Astronomy Tools

Final tweaking

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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
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
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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	1189092
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Contribution Index (beta):

Simeis 57 (Propeller Nebula)

Simeis 57 (Propeller Nebula)

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Image Index:

Contribution Index (beta):

Simeis 57 (Propeller Nebula)

Simeis 57 (Propeller Nebula)

Equipment

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Description

Comments

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