Ring Nebula (sydney)

Celestial hemisphere: Northern · Constellation: Lyra (Lyr) · Contains: IC 1296 · M 57 · NGC 6720 · Ring nebula in Lyra

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Ring Nebula

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Ring Nebula

The Ring Nebula (M57) is the remnant of a dying sun-like star that is shedding shells of material into the interstellar medium. The star which formed this planetary nebula is now a white dwarf and is visible in the center of the structure. M57 is about 2,300 light-years away in the constellation Lyra.

The Ring Nebula is one of the first objects I viewed through my Tasco 4 ½ reflector many years ago, in part because its core is very bright and easily visible even from light polluted observing sites. This image is a combination of broadband RGB and narrowband Hα/OIII data. The challenge of combining the bright core with the faint outer shells discouraged me from processing this image for three months. The core is easily blown out while the signal from the outermost Hα shell is very weak. I think I am now finished and can move on to other images. Hope you like this.

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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	Basic success
Started	...
Astrometry.net job	2911244
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Ring Nebula

Ring Nebula

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Image Index:

Contribution Index (beta):

Ring Nebula

Ring Nebula

Equipment

Acquisition details

Description

Comments

Sky plot

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