Horsehead Nebula in Ha (Michael Southam)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: B33 · Horsehead nebula · IC 434 · NGC 2023 · Sh2-277

Powered byPixInsight

Horsehead Nebula in Ha

Powered byPixInsight

Horsehead Nebula in Ha

This is my first attempt at the Horsehead Nebula and first Ha only image. After not being able to resolve the nebula with a 5 minute luminance exposure, I turned to Ha. I was excited to see the Horsehed was easily visible in the first exposure so I kept the capture going. The final stack is 11 x 300" shots. I have had limited success using the PI Batch Reprocessing script to stack Ha frames so I decided to stack manually. The resulting image integration was noisy and star trailed. I set the Batch Reprocessing script and was pleasantly surprised when the stack worked first time.

The Horsehead Nebula (also known as Barnard 33 ) is a dark nebula in the constellation Orion. The nebula is located just to the south of the star Alnitak, which is farthest east on Orion's Belt, and is part of the much larger Orion Molecular Cloud Complex. The nebula was first recorded in 1888 by Scottish astronomer Williamina Fleming on photographic plate B2312 taken at the Harvard College Observatory. The Horsehead Nebula is approximately 1500 light years from Earth. It is one of the most identifiable nebulae because of the shape of its swirling cloud of dark dust and gases, which bears some resemblance to a horse's head when viewed from Earth.

Original
Final
B

Imaged with APT
AstroBin Platform open discussions community forum

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	944965
PixInsight job	9ONVPGHSBX250CZIMSOC83HO9OM3NCPB
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h41m00s.917
RA (top/left)	05h39m57s.798
RA (top/right)	05h40m12s.726
RA (bottom/right)	05h42m04s.127
RA (bottom/left)	05h41m49s.560

Dec (center)	-02°27′32″.41
Dec (top/left)	-02°05′49″.25
Dec (top/right)	-02°51′33″.44
Dec (bottom/right)	-02°49′15″.43
Dec (bottom/left)	-02°03′32″.13

Image Index:

Contribution Index (beta):

Horsehead Nebula in Ha

Horsehead Nebula in Ha

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

Horsehead Nebula in Ha

Horsehead Nebula in Ha

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these public groups

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?

Delete this revision?

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