Comet C/2021 A1 (Leonard) meets Messier 3 (Comet C/2021 A1 (Leonard) meets Messier 3) (Justin Hendrickson)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: Solar system body or event

Powered byPixInsight

Comet C/2021 A1 (Leonard) meets Messier 3 (Comet C/2021 A1 (Leonard) meets Messier 3)

Powered byPixInsight

Comet C/2021 A1 (Leonard) meets Messier 3 (Comet C/2021 A1 (Leonard) meets Messier 3)

This image was meant to be a practice run. It was my first time imaging a comet with a mono camera and I had plans to capture a close pass of Messier 3 the following morning, but when I got up early in the morning on December 3rd, I was fogged in hard, so I made due with the previous night's data. Here is what my work flow looked like:

Acquisition:

Looped RGBL 60s x 13 using NINA

Post Processing:

Stacked each filter separately on background stars in DSS
Combined in PS
Adjusted levels/curves/denoise
Put resultant RGBL image through starnet++
Took resultant comet-only image and subtracted it from starnet++ input to get starfield only image
Restacked each filter separately stacked on comet this time
Combined starless RGB comets in PS
Ran it through RGB starnett++
Masked out stars/healed where necessary
Adjust levels/curves/denoise of comet only
Added comet only back to starfield
Ran lum stacked on comet through starnet++
Added comet lum data back on top of combined image
Crop/brightness/etc

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	Advanced success
Started	...
Astrometry.net job	6022519
PixInsight job	ADXSTQLRIQ0BHB4NMFTSGUWWAY5009KE
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h38m29s.99
RA (top/left)	13h32m36s.55
RA (top/right)	13h44m20s.22
RA (bottom/right)	13h44m28s.86
RA (bottom/left)	13h32m33s.73

Dec (center)	+28°41′12″.8
Dec (top/left)	+27°49′16″.2
Dec (top/right)	+27°48′17″.1
Dec (bottom/right)	+29°32′11″.1
Dec (bottom/left)	+29°33′14″.7

Image Index:

Contribution Index (beta):

Comet C/2021 A1 (Leonard) meets Messier 3 (Comet C/2021 A1 (Leonard) meets Messier 3)

Comet C/2021 A1 (Leonard) meets Messier 3 (Comet C/2021 A1 (Leonard) meets Messier 3)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

Comet C/2021 A1 (Leonard) meets Messier 3 (Comet C/2021 A1 (Leonard) meets Messier 3)

Comet C/2021 A1 (Leonard) meets Messier 3 (Comet C/2021 A1 (Leonard) meets Messier 3)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information