Rosette Nebula HOO (Christopher Stobie)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon) · Contains: 12 Mon · NGC 2237 · NGC 2238 · NGC 2239 · NGC 2244 · NGC 2246 · Rosette A · Rosette B · Rosette Nebula · Sh2-275 · The star 12Mon

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Rosette Nebula HOO

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Rosette Nebula HOO

Processing Details

Stacked and aligned in DSS

PixInsight

First up DBE to remove gradients

Then onto EZSuite Noise reduction

Then a linear stretch using EZSuite SoftStretch

Straton

Remove stars from Ha/OIII Images

Photoshop

Removal of star artifacts with dust/scratches filter

PixInsight

Without starless narrowband images I do further noise reduction and aggressive stretching with some black clipping to really get the contrast of the data, once satisfied with the stretching

Pixelmath to produce a BiColour image.

R=Ha

G=(0.35*Ha) + (0.65*Oiii)

B=(0.2*Ha)+(0.8*Oiii)

Separate the channels into RGB using RGB Split, and re-combine with LRGB using a stacked image of both OIII & Ha as the Luminance Channel

Color masks to modify the reds to more of an orange, and the cyan to more of a blue

EZ Suite HDR

Range mask and star mask to increase the smaller details in the nebula with MultiScaleLinearTransform

Curve adjustments for saturation and contrast improvements

DarkStructureEnhance utility

Photoshop

TopazLabs Noise Reduction

Notes:

I plan to add SII data soon and do a true SHO image. I think there is too much noise reduction in this image at the moment, so I plan on modifying some processing in the SHO version to get a more realistic image. I think the lack of noise comes from the ToneMapping process I did which clips some of the blacks in the Mono images before recombining with the Luminance channel, which is pretty noiseless to begin with.

Worth noting that I am beyond impressed with the Chroma OIII filter. Night and Day compared to previous filters (Atik/ZWO)

Original
Final
B

B

Description: BiColour - Ha & OIII

Uploaded: ...

Cloudy Nights

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	4146871
PixInsight job	0L4DKJHEDFQP5XQ77WBB5QLDNHC6CJX7
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	06h31m53s.22
RA (top/left)	06h34m38s.83
RA (top/right)	06h33m16s.22
RA (bottom/right)	06h29m07s.32
RA (bottom/left)	06h30m30s.45

Dec (center)	+04°59′06″.5
Dec (top/left)	+04°25′31″.2
Dec (top/right)	+05°48′08″.9
Dec (bottom/right)	+05°32′39″.10
Dec (bottom/left)	+04°10′03″.9

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Contribution Index (beta):

Rosette Nebula HOO

Rosette Nebula HOO

Equipment

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B

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Image Index:

Contribution Index (beta):

Rosette Nebula HOO

Rosette Nebula HOO

Equipment

Acquisition details

Description

Comments

Revisions

B

Sky plot

Histogram

In these public groups

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