The Monkey Head Nebula (NGC 2175) (Luca Marinelli)

Celestial hemisphere: Northern · Constellation: Orion (Ori) · Contains: IC 2159 · NGC 2174 · NGC 2175 · Sh2-252

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The Monkey Head Nebula (NGC 2175)

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The Monkey Head Nebula (NGC 2175)

The Monkeyhead Nebula (NGC 2174-2175) is an emission nebula in the constellation Orion, close to the Jellyfish Nebula in Gemini.

Processing workflow:

- PI: Drizzle Integration, DBE, deconvolution, linear noise reduction on each channel Ha, OIII, SII

- PI: Masked stretch, TGVD, SHO channel combination, magenta star halo removal

- starnet: remove stars from SHO

- Photoshop CC: Use the mask generated by starnet and Content Aware fill to remove residual artifacts from starless SHO image

- Photoshop CC: ColorMask tool to remap SHO palette, LRGB combination with Ha master, sharpening with High Pass filter on starless luminance, contrast adjustments

- PI: Downsample to original pixel size, Color noise reduction with ACDNR, final sharpening, Dark Structure Enhance

Original
C
D
E
Final
G

C

Description: Improved local contrast and raised black point, slightly.

Uploaded: ...

D

Description: Adjusted color palette and blue black point.

Uploaded: ...

E

Description: Animation showing the workflow to create a starless chrominance SHO image with starnet and Adobe Photoshop CC.

Uploaded: ...

G

Description: Complete reprocess following suggestions by Chris Gomez to improve noise reduction.

Uploaded: ...

Cloudy Nights
Narrowband imaging
Takahashi Refractors
Northeast Imagers
Sony ICX814

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	2652261
PixInsight job	NYN585A76EOKEQ0A571A4N11O7SOVYVD
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	06h09m50s.45
RA (top/left)	06h07m21s.41
RA (top/right)	06h12m16s.52
RA (bottom/right)	06h12m20s.45
RA (bottom/left)	06h07m23s.38

Dec (center)	+20°35′41″.6
Dec (top/left)	+20°06′02″.7
Dec (top/right)	+20°05′15″.8
Dec (bottom/right)	+21°05′12″.3
Dec (bottom/left)	+21°05′59″.9

Image Index:

Contribution Index (beta):

The Monkey Head Nebula (NGC 2175)

The Monkey Head Nebula (NGC 2175)

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Image Index:

Contribution Index (beta):

The Monkey Head Nebula (NGC 2175)

The Monkey Head Nebula (NGC 2175)

Equipment

Acquisition details

Description

Comments

Revisions

C

D

E

G

Sky plot

Histogram

In these public groups

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