Sh2-261. the Lower's Nebula, SHO and RGB (AnaTa)

Celestial hemisphere: Northern · Constellation: Orion (Ori) · Contains: 69 Ori · 69 f01 Ori · HD41593 · HD41997 · LBN 862 · LBN 863 · LBN 864 · LDN 1587 · Sh2-261 · The star f1 Ori

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Sh2-261. the Lower's Nebula, SHO and RGB

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Sh2-261. the Lower's Nebula, SHO and RGB

Main image is SHO with SNR=48. Then there is RGB annotation
Panel A: SHO
Panel B: RGB annotation

Processing:
WBPP with drizzle integration.
Cropping for Ha, O3, S2, R, G and B.
GraXpert for Ha, O3, S2, R, G and B.
Combined RGB
DBE for RGB.
Color Colib for RGB
Blur and Noise XT for Ha, O3, S2 and RGB
Star XT for Ha, O3, S2 and RGB. RGB stars were kept; others were discarded.
Manual stretching (with HT) for Ha, O3, S2, RGB, and RGB-stars (weak and strong stretch)

1. Processing (panel B)
Extra noise XT for RGB
Stretch more RGB.
Lum mask for RGB
Local Histogram Equalization: Kernel radius of 40 and 150
Multiscale-median transform for sharpness; strong 0.4-0.5 setting.
Curves: saturation and brightness are manipulated
Mask off.
Add strongly stretched and saturated stars.
Annotation for panel B
Done

2. Processing (panel A)
Combined S2-red, Ha-green, O3-blue
Played with Hue-Saturation until final image (took 2h each!). Foraxx did not work. PixelMath was not used.
Extra noise XT for SHO image
Stretch more SHO.
Lum mask for SHO
Local Histogram Equalization: Kernel radius of 40 and 150
Multiscale-median transform for sharpness; strong 0.4-0.5 setting.
Curves: saturation and brightness are manipulated
Mask off.
Add weakly stretched and saturated stars.
Done

Original
Final
B

Nebulas (Emission)

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	Advanced success
Started	...
Astrometry.net job	8944497
PixInsight job	7Z1Y0W9EQZ56GJASPNAHQSAIUNFNX87U
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h09m20s.77
RA (top/left)	06h06m31s.90
RA (top/right)	06h12m09s.90
RA (bottom/right)	06h12m11s.55
RA (bottom/left)	06h06m31s.38

Dec (center)	+15°39′42″.7
Dec (top/left)	+14°59′00″.3
Dec (top/right)	+14°58′39″.10
Dec (bottom/right)	+16°20′16″.7
Dec (bottom/left)	+16°20′37″.0

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Sh2-261. the Lower's Nebula, SHO and RGB

Sh2-261. the Lower's Nebula, SHO and RGB

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Image Index:

Contribution Index (beta):

Sh2-261. the Lower's Nebula, SHO and RGB

Sh2-261. the Lower's Nebula, SHO and RGB

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these collections

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