M57 - Ring Nebula (Paul Ricker)

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

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M57 - Ring Nebula

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M57 - Ring Nebula

M57, the Ring Nebula in Lyra, is a planetary nebula about 790 pc away. The central star is a post-AGB/young white dwarf object. Longer exposures show the recombining AGB wind surrounding the bright central shell. Spectroscopic observations by O'Dell et al. (2007) allowed them to reconstruct the 3D structure of the nebula. It appears to be bipolar, with the pole almost along the line of sight and an equatorial density enhancement almost in the plane of the sky. If These nebulae can achieve shapes like this through the interaction of the ejected stellar envelope with a previous common envelope outflow; my colleagues Guillermo Garcia-Segura, Ronald Taam, and I have used hydrodynamical simulations to study the physical mechanisms behind this shaping in a series of papers over the past four years.

It's a fun, if small, nebula, and relatively easy to find. I would often go back to it in high school with my little 3" Newtonian. Eventually I'll go for more exposure to try to catch the fainter nebulosity. I did catch the little photo-bomb galaxy IC 1296!

A total of 71 minutes L, 56 minutes R, and 26 minutes each in G and B, with 15-60 second frames taken on 2019/09/16, 2020/09/25, 2020/10/07, and 2022/08/31. All but the last with the ASI 183 camera; the last is with the ASI 294 camera. All binning 1x1.

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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	6256873
PixInsight job	1OJ259O3MPHXAPNFU6N26RH09Z3UY6Y2
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h53m35s.335
RA (top/left)	18h53m58s.216
RA (top/right)	18h53m12s.577
RA (bottom/right)	18h53m12s.470
RA (bottom/left)	18h53m58s.910

Dec (center)	+33°01′49″.51
Dec (top/left)	+33°05′19″.66
Dec (top/right)	+33°05′21″.66
Dec (bottom/right)	+32°58′18″.69
Dec (bottom/left)	+32°58′16″.94

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M57 - Ring Nebula

M57 - Ring Nebula

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M57 - Ring Nebula

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