NGC 7293 Helix Nebula #2 (Molly Wakeling)

Celestial hemisphere: Southern · Constellation: Aquarius (Aqr) · Contains: Helix Nebula · NGC 7293 · PK036-57.1

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NGC 7293 Helix Nebula #2

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NGC 7293 Helix Nebula #2

Most planetary nebula appear very small in telescopes, but this one is quite close (in astronomical terms), so it appears much larger - in visible light, nearly the size of the full Moon. It's only about 700 lightyears away. Planetary nebulae are the end state of smallish stars like our Sun that aren't massive enough to go supernova - they eject their gas over tens of thousands of years. It's about 2.5 lightyears across, and is called the Helix because it appears from our vantage point that we are looking down a helical structure. Some call it the Eye of God, or the Eye of Sauron. The red is hydrogen-alpha emission, and the blue-green is from a specific oxygen transition that occurs in low-density gas (called OIII).

Blog entry link: [url=http://astronomollylog.blogspot.com/2017/07/100-friday-july-28-2017-100th-trip.html"]Blog entry link< /a>

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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	3639346
PixInsight job	4NAPVGCXU5RHG8IJJ570DN6Q27R7HH5F
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	22h29m20s.72
RA (top/left)	22h27m07s.62
RA (top/right)	22h26m45s.11
RA (bottom/right)	22h31m35s.36
RA (bottom/left)	22h31m54s.67

Dec (center)	-20°51′58″.2
Dec (top/left)	-19°59′44″.5
Dec (top/right)	-21°40′48″.5
Dec (bottom/right)	-21°44′05″.2
Dec (bottom/left)	-20°02′59″.1

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NGC 7293 Helix Nebula #2

NGC 7293 Helix Nebula #2

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NGC 7293 Helix Nebula #2

NGC 7293 Helix Nebula #2

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