Crater Kepler (Niall MacNeill)

Contains: Solar system body or event

Crater Kepler

Acquisition type: Lucky imaging

Crater Kepler

Acquisition type: Lucky imaging

This is a colour image of the crater Kepler and the terrain (lunain) to its west. The ray system from this crater extends for well over 300kms and its intricate detail is visible here. I find the subtle shading and patterns across this area a beautiful sight.

The subtle colour tones in this landscape as part of Oceanus Procellarum are just wonderful. Around the crater and to its left (east) there is a distinctly greenish hue but on the other side it is more blue/ grey. At the edge of the FOV and I regret not getting the whole thing in, is the white stain known as Reiner Gamma. It is known as a lunar swirl and is just a stain on the lunar surface. Its origin is not completely understood and it is associated with a localised magnetic field, but not with any particular irregularities on the surface. It is believed that the shape is caused by magnetic anomalies which direct the solar radiation towards some areas and away from others, which influence the rate of solar weathering and hence the colour of the topography. The crater Reiner is to its left in the image.

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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.

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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.

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Astrometry.net job	n/a
PixInsight job	n/a
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