Comet Leonard (12/05/21) (Alex Woronow)

Celestial hemisphere: Northern · Constellation: Boötes (Boo)

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Comet Leonard (12/05/21)

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Comet Leonard (12/05/21)

Comet Leonard (12/05/21)
Cdk17 NM (subs by Benard Miller)
RGB: 10 each x 30"
L: 9 x 30"
Total exposure: 9.5'
Processed by Alex Woronow (2021) using PixInsight and Topaz

This is my first comet picture--I had little idea there was so much involved! PixInsight's CometAlignment process lacked any meaningful documentation that I could find, but a few tutorials highlighted the way forward. The mono subs made processing much more complex than it would have been with a CFA sensor but allowed for better color calibration, I believe. The use of StarXTerminator in PI was a boon, along with some custom PixelMath icons that replaced the stars in a reasonable way. I noticed that many of the comet images I have seen have a bright aqua tone throughout. My color calibration yielded red in the tail. Since the head is aqua, the entire comet could have been aqua if that were its actual color. Then it seems most logical that the comet is not a head-to-tail aqua-toned object. (Right?)

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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	5338012
PixInsight job	4VWOXTTYIWMZWQTQ4AO9VD4UVBZ9BJ6F
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	14h13m14s.96
RA (top/left)	14h14m34s.93
RA (top/right)	14h11m55s.59
RA (bottom/right)	14h11m55s.48
RA (bottom/left)	14h14m34s.22

Dec (center)	+25°16′34″.3
Dec (top/left)	+25°34′28″.6
Dec (top/right)	+25°34′33″.3
Dec (bottom/right)	+24°58′36″.5
Dec (bottom/left)	+24°58′30″.1

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Comet Leonard (12/05/21)

Comet Leonard (12/05/21)

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Comet Leonard (12/05/21)

Comet Leonard (12/05/21)

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