B33 - Horsehead Nebula in HaRGB (Mauro Sturaro)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: Flame Nebula · IC 434 · NGC 2023 · Orion B

B33 - Horsehead Nebula in HaRGB, Mauro Sturaro

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B33 - Horsehead Nebula in HaRGB

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B33 - Horsehead Nebula in HaRGB

The B33 Horsehead Nebula is a distinctive dark nebula in the Orion constellation, notable for its striking resemblance to a horse's head when viewed in silhouette. This nebula is located approximately 1,500 light-years from Earth and is a part of a larger cloud of dust and gas. The Horsehead Nebula's shape is primarily the result of thick dust blocking the light from the bright emission nebula, IC 434, which lies behind it.

It was discovered by Scottish astronomer Williamina Fleming in 1888 while working at the Harvard College Observatory.

The Horsehead Nebula is relatively small in size, spanning about 3-4 light-years across. It is composed of cold, dense gas and dust, forming a nursery where new stars are born. The nebula's darkness is punctuated by the occasional bright flecks of young stars peeking through the dense cloud. Its red glow is due to the ionization of hydrogen gas by the nearby bright star Sigma Orionis.

All images are bin 2 at -10°C.
I integrated the images in RGB and in Ha.
I like GraXpert, but it did a terrible job with this image, so after SPCC I used just a touch of DBE, then BlurXterminator.
Then I removed the stars, stretched everything with GHS and integrated the Ha channel with RGB using "NBRGB Combination script".
After some tweaking with GHS I added the RGB stars.

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	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	9081890
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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B33 - Horsehead Nebula in HaRGB

B33 - Horsehead Nebula in HaRGB

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Image Index:

Contribution Index (beta):

B33 - Horsehead Nebula in HaRGB

B33 - Horsehead Nebula in HaRGB

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Description

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