Horsehead Nebula (Jochen Maes)

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

Horsehead Nebula

Link: https://www.jochenmaes.com/astronomy/nebulae?itemId=eauj52jhk5qr8bywfo7raqnn4p5hcd

Horsehead Nebula

Link: https://www.jochenmaes.com/astronomy/nebulae?itemId=eauj52jhk5qr8bywfo7raqnn4p5hcd

B33 (Horsehead Nebula) is a dark nebula in the Orion constellation, around 1375 light years from earth.

Because emissions within this region/frame are mostly limited to HA and SII (tiny bit of OIII, but largely neglectable), I decided to see what I could do with only using that data. The reason why there's little OIII emissions in the region is fairly straightforward. Hydrogen (HA) and Sulfur (SII) quite simply have a much lower energy requirement for ionization (the processs that "triggers" these emissions) to take place compared to Oxygen (OIII). Due to there being a lot of dark dust (the whole reason we even see the horsehead) in the area; energy transmission is limited to the extent where there's enough for the former two elements to get ionized, not quite enough for (large amounts of) the latter.

Image acquisition details:

20x1800" HA
30x1800" SII

Used the typical HSS colour scheme and created a synthetic luminance layer on top to pull out a bit more detail. This layer consisted of a combined HA/SII signal, weighted down to include 33% of each.

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	Basic success
Started	...
Astrometry.net job	5417632
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

Image Index:

Contribution Index (beta):

Horsehead Nebula

Horsehead Nebula

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

Horsehead Nebula

Horsehead Nebula

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information