NGC 6891 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Delphinus (Del) · Contains: NGC 6891 · PK054-12.1

NGC 6891

This object is a rarely imaged tiny planetary nebula located 12,000 light years away in the constellation of Delphinus at a declination of +13 degrees. The nebula spans only 18 arc-seconds in our apparent view. This is a typically sized PN but it appears tiny to us because it is so far away.

This nebula has 4 distinct regions:

1) The bright 12th magnitude central star, white in color.

2) The bright elliptical inner shell with a diameter of 0.5 light years, turquoise in color.

3) The circular intermediate shell with a diameter of 1 light year, blue in color.

4) A very faint outer shell with a diameter of 5 light years, blue in color.

This outer shell is only faintly visible in the main image.

The 3 shells were formed from the progenitor star losing mass at various stages towards the end of its life. The color of the nebula in this RGB image should be a fairly accurate representation of the colors of the nebula.

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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	3254307
PixInsight job	UD8XW07PLDP33865T0U6CX86FDZ1EEEE
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h15m08s.735
RA (top/left)	20h14m36s.348
RA (top/right)	20h15m43s.984
RA (bottom/right)	20h15m41s.150
RA (bottom/left)	20h14m33s.475

Dec (center)	+12°42′17″.73
Dec (top/left)	+12°36′03″.30
Dec (top/right)	+12°37′03″.56
Dec (bottom/right)	+12°48′31″.93
Dec (bottom/left)	+12°47′31″.63

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NGC 6891

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NGC 6891

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