M 57 - The Ring Nebula with Ha shell (James E.)

Celestial hemisphere: Northern · Constellation: Lyra (Lyr) · Contains: IC 1296 · M 57 · NGC 6720 · PK063+13.1 · Ring Nebula

Powered byPixInsight

M 57 - The Ring Nebula with Ha shell

Powered byPixInsight

M 57 - The Ring Nebula with Ha shell

While M57 is a small, but bright and easily imaged target, this version was a challenge to process due to the high dynamic range of its brightness – a super bright core with a super faint surrounding hydrogen shell. Extended Ha imaging was required to adequately bring out the outer shell (see revisions for 13 hour starless Ha image) although I had a lot of similar processing practice with my previous target, "M27 - The Dumbbell Nebula with wings" shown here: https://astrob.in/d1njs0/0/

M57 is a well known planetary nebula located 2,750 light years away in Lyra. Photographs taken over a period of 50 years show the rate of expansion is roughly 1 arcsecond per century which corresponds to spectroscopic observations as 20-30 km per sec. The central white dwarf is of visual magnitude 15.75. M57 is a bipolar nebula with a symmetrical axis at about 30 degrees as viewed from Earth. The observed nebulosity has currently been expanding for approximately 1,600 years. (Wikipedia)

Taken over several nights: Jun 17, 22-23; Aug 24, 29; Sept 2-4, 2021

Original
Final
C

Schmidt-Cassegrain Telescope (SCT) Imagers
NOVAC
N.I.N.A. Users
Narrowband imaging
Images from the EdgeHD Series
ZWO ASI2600MM Pro

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	4975559
PixInsight job	OL7ZCPZ4C7P7GOGMF23PCL9SDHRGY054
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h53m33s.277
RA (top/left)	18h52m53s.517
RA (top/right)	18h52m56s.474
RA (bottom/right)	18h54m12s.946
RA (bottom/left)	18h54m10s.300

Dec (center)	+33°02′03″.33
Dec (top/left)	+33°08′56″.47
Dec (top/right)	+32°54′28″.56
Dec (bottom/right)	+32°55′09″.50
Dec (bottom/left)	+33°09′35″.19

Image Index:

Contribution Index (beta):

M 57 - The Ring Nebula with Ha shell

M 57 - The Ring Nebula with Ha shell

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

M 57 - The Ring Nebula with Ha shell

M 57 - The Ring Nebula with Ha shell

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these public groups

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?

Delete this revision?

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