Sh2 203 H-alpha RGB (Jerry Yesavage)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: Sh2-203

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Sh2 203 H-alpha RGB

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Sh2 203 H-alpha RGB

This extended diffuse HII region may be ionised by the B class star LS I +55 47.

From: http://galaxymap.org/cat/list/sharpless/201

In case anyone is interested in the workflow for the destarred images, the stars and the denoising:

Create Stretched HA and RGB

Destar HA in PI

Denoise RGB and Destarred HA in PS

Clip Denoised RGB in PS to small stars

Extract L from Denoised RGB for Stars in PI

Clip (AutoZero) Denoised Destarred HA in PI

Histogram stretch to 50% across

HDRM (6) Stretch Denoised Destarred HA in PI

LHE Stretch Denoised Destarred HA in PI (Possible)

S-curve Stretch Denoised Destarred HA in PI

Denoise again now Denoised Destarred2 HA in PS... stretching brings back noise

Add Stars Back to Denoised Destarred2 HA in PI

Combine Denoised RGB and Destarred2 HA in PS

RGB_HA and RGB_denoised back to PI

Final Image Pixel math

RGB_HA-Stars+RGB_denoised(RGB Stars)

Final Histogram Clip and S-curve stretch and saturation in PI

Original
Final
B

B

Description: Stars more saturated

Uploaded: ...

Light Polluted skies
The refractors!
Cloudy Nights
SF Bay Area Imagers
Members of Deep Sky West
Suburban Astrophotography
Narrowband imaging
"Simply Stellarvue"
Sharpless2 Objects

Sharpless2 Objects

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Distribution of astrophotographers

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	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
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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
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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	3078545
PixInsight job	MHFUR5CVVM8LLWBLY91WNVAOCPAPQHXE
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	03h22m04s.89
RA (top/left)	03h25m48s.69
RA (top/right)	03h18m21s.17
RA (bottom/right)	03h18m25s.65
RA (bottom/left)	03h25m43s.97

Dec (center)	+54°52′36″.0
Dec (top/left)	+55°16′59″.9
Dec (top/right)	+55°17′00″.10
Dec (bottom/right)	+54°27′47″.1
Dec (bottom/left)	+54°27′45″.9

Image Index:

Contribution Index (beta):

Sh2 203 H-alpha RGB

Sh2 203 H-alpha RGB

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B

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Image Index:

Contribution Index (beta):

Sh2 203 H-alpha RGB

Sh2 203 H-alpha RGB

Equipment

Acquisition details

Description

Comments

Revisions

B

Sky plot

Histogram

In these public groups

In these collections

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