Orion rising over Grand Canyon, composition check shot (Astrotracer) (AlenK)

Celestial hemisphere: Southern · Constellation: Monoceros (Mon) · Contains: Extremely wide field

Orion rising over Grand Canyon, composition check shot (Astrotracer), AlenK

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Orion rising over Grand Canyon, composition check shot (Astrotracer)

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Orion rising over Grand Canyon, composition check shot (Astrotracer)

This is a single exposure taken with a stationary camera at Mather Point in Grand Canyon National Park (South Rim). Astrotracer was used for tracking, with the camera mounted directly to a tripod. The lens was at the 18mm end of the zoom range and stopped down to f/5 to reduce aberrations somewhat (although this lens never gets good in the corners at any f-stop). This exposure was just a composition check. For the sky, I took dozens of similar 30-second tracked exposures at a much lower ISO (20 minutes worth, in fact), to be stacked and composited with another stack of untracked exposures I took of the foreground.

This image has not been processed other than minor curves adjustment. Although objectively unimpressive, it does give a good impression of what I experienced that night except for the sky seeming darker to my eyes and, of course, not seeing quite so many stars.

The green glow near the horizon is natural airglow, which was not visible to my unaided eyes. Although it is natural, it essentially acts like light pollution and I will need to remove it from the final sky stack using gradient reduction.

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Distribution of astrophotographers

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	Distinct awarded users	Total awarded images
Image of the day
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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

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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
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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.
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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	3296501
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Orion rising over Grand Canyon, composition check shot (Astrotracer)

Orion rising over Grand Canyon, composition check shot (Astrotracer)

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Orion rising over Grand Canyon, composition check shot (Astrotracer)

Orion rising over Grand Canyon, composition check shot (Astrotracer)

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