Orion and Horsehead Mosaic (Ha) (George Chappel)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 41 Ori A) · 41 Ori C · 41 Ori D · 41 the01 Ori · 42 Ori) · 42 c Ori · 43 Ori) · 43 the02 Ori · 44 Ori) · 44 iot Ori · 45 Ori · 48 Ori · 48 sig Ori · 50 Ori) · 50 zet Ori · Alnitak · B33 · Flame Nebula · Great Orion Nebula · HD36134 · HD36457 · HD36591 · HD36646 · HD36710 · HD36780 · HD36827 · HD36843 · HD36916 · HD36959 · HD36960 · And 72 more.

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Orion and Horsehead Mosaic (Ha)

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Orion and Horsehead Mosaic (Ha)

A full-frame camera used with just 480mm of focal length provides for a fairly wide field of view (4.30° x 2.87°). This is usually adequate to capture even the largest of deep sky objects, but when you bring in the option of mosaics with a wide field of view, you open up new possibilities of viewing the night sky. For example, Horsehead and Orion are probably two of the most commonly imaged deep sky objects. The vast majority of the images captured on these two amazing targets are tightly centered on either the Horsehead or Orion. But when you bring them both into the same image, the entire region around them comes alive with the HII of the Orion molecular cloud complex.

This image was a "proof of concept" thrown together on New Year's Eve to see if the final product would be worthy pursuing as a full-up HaRGB image. It is a two-panel, HDR mosaic and overall, I was pleased with the results considering just a little over four hours of integration time and the moon phase (~75% illuminated). I decided to pursue the HaRGB image and was able to capture some additional Ha data a few nights later (not integrated into this image), but unfortunately the clouds did not cooperate and I was unable to gather the RGB data necessary to complete this mosaic back in January. I will now have to wait until the Fall when this area of the sky is imageable again.

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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	7789113
PixInsight job	TA6GFU7CF64JRU5J3XL0KS0UPLSY6MV3
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h37m31s.25
RA (top/left)	05h29m25s.52
RA (top/right)	05h29m21s.41
RA (bottom/right)	05h45m41s.26
RA (bottom/left)	05h45m37s.82

Dec (center)	-03°59′37″.8
Dec (top/left)	-01°20′58″.6
Dec (top/right)	-06°38′05″.5
Dec (bottom/right)	-06°37′59″.3
Dec (bottom/left)	-01°20′55″.1

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Orion and Horsehead Mosaic (Ha)

Orion and Horsehead Mosaic (Ha)

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Image Index:

Contribution Index (beta):

Orion and Horsehead Mosaic (Ha)

Orion and Horsehead Mosaic (Ha)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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