Headphone Nebula (PK 164+31.1) (Massimo Di Fusco)

Celestial hemisphere: Northern · Constellation: Lynx (Lyn) · Contains: PK164+31.1

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Headphone Nebula (PK 164+31.1)

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Headphone Nebula (PK 164+31.1)

Jones-Emberson 1 (also known as PK 164 + 31.1 or Headphone Nebula) is a 14th magnitude planetary nebula located in the northern part of the Lynx constellation at a distance of 1600 light years from Earth. It was discovered in 1939 by Rebecca B. Jones and Richard Emberson on a photographic plate acquired with the 40 cm diameter refracting telescope of the Oak Ridge Observatory.
Like many other planetary nebulae, its structure and shape are due to the expansion of a shell of gas ejected from a dying star. At its center there is a white dwarf of magnitude 16.8 of blue color, whose ultraviolet radiation excites and illuminates the envelope of gas, composed mainly of hydrogen, which gives the characteristic red color, while the blue areas are due to the presence of oxygen. This nebula is believed to have a bipolar shape, with the axis of the lobes oriented almost exactly in the direction of the Earth, to the point that it appears seen from a polar angle.

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AAA : Astronomes et Astrographes Amateurs
Reflecting Telescope Group
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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
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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
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Star trails
Northern lights
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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
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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	6517573
PixInsight job	07G1FWJL3X70MP0M2BZ4H1SYPAQ48BC9
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	07h57m51s.92
RA (top/left)	07h55m44s.80
RA (top/right)	08h00m01s.54
RA (bottom/right)	08h00m01s.28
RA (bottom/left)	07h55m40s.65

Dec (center)	+53°26′06″.9
Dec (top/left)	+53°09′31″.9
Dec (top/right)	+53°09′50″.4
Dec (bottom/right)	+53°42′31″.6
Dec (bottom/left)	+53°42′14″.0

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Headphone Nebula (PK 164+31.1)

Headphone Nebula (PK 164+31.1)

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Image Index:

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Headphone Nebula (PK 164+31.1)

Headphone Nebula (PK 164+31.1)

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