M13 during full moon (Doug.,N. Jiang)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: Great Cluster in Hercules · M 13 · NGC 6205

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M13 during full moon

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M13 during full moon

The M13 project is an experiment for DSO under full moon. This is theoretically equivalent to imaging in highly light polluted area. The power of full moon is destructive to deep sky imager, it wipes out the milky way and almost anything faint in the sky. The uneven illumination as the moon at different distance of the target translates into various gradients in the integrated image. These gradients are exceedingly difficult to remove. Despite various attempts of DBE, reshoot flat for calibration, it remains in substantial amount in the image. This inhibits stretching substantially or difficult to reveal the dimmer object while remaining a reasonable even background.

As mentioned in the earlier M63 project, the rain season is approaching, the weather become increasingly unstable. I am lucky to pump out one more image before the serious rainfalls. Since it is a less serious project, I have invested much less time into the imaging stage. It concludes at the 16 hours mark.

China Lijiang Gemini Observatory
Cloudy Nights

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	2665761
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M13 during full moon

M13 during full moon

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M13 during full moon

M13 during full moon

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