The Helix Nebula (NGC 7293) in Narrow Band (Ian Parr)

Celestial hemisphere: Southern · Constellation: Aquarius (Aqr) · Contains: Helix Nebula · NGC 7293

The Helix Nebula (NGC 7293) in Narrow Band, Ian Parr

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The Helix Nebula (NGC 7293) in Narrow Band

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The Helix Nebula (NGC 7293) in Narrow Band

The Helix Nebula (NGC 7293) is located in the constellation Aquarius and is one of the closest planetary nebula to the Earth at a distance of around 655 light-years.
It has an apparent magnitude of 7.6 and is about 25 arcminutes in size. The Helix Nebula has sometimes been referred to as the Eye of God or the Eye of Sauron.
The remnant central stellar core of the planetary nebula is destined to become a white dwarf star and the glow of the central star is so energetic that it causes the previously expelled gases to brightly fluoresce.

I last imaged it in the first week of September 2021 but the weather now is rubbish (again) so I thought I would revisit the data using new techniques and tools, including NormalizeScaleGradient and GeneralisedHyperbolicStretch in Pixinsight (which are brilliant).

It is now well placed so I plan to revisit it in RGB on the next new moon assuming La Nina takes a break.

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	Basic success
Started	...
Astrometry.net job	6250988
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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The Helix Nebula (NGC 7293) in Narrow Band

The Helix Nebula (NGC 7293) in Narrow Band

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The Helix Nebula (NGC 7293) in Narrow Band

The Helix Nebula (NGC 7293) in Narrow Band

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